remove $link

6 files changed, 301 insertions, 305 deletions

diff --git a/classes/pref/feeds.php b/classes/pref/feeds.php
index 9dc515556..27e03f0e2 100644
--- a/classes/pref/feeds.php
+++ b/classes/pref/feeds.php
@@ -15,11 +15,11 @@ class Pref_Feeds extends Handler_Protected {
 	}
 
 	function renamecat() {
-		$title = db_escape_string($this->link, $_REQUEST['title']);
-		$id = db_escape_string($this->link, $_REQUEST['id']);
+		$title = db_escape_string( $_REQUEST['title']);
+		$id = db_escape_string( $_REQUEST['id']);
 
 		if ($title) {
-			db_query($this->link, "UPDATE ttrss_feed_categories SET
+			db_query( "UPDATE ttrss_feed_categories SET
 				title = '$title' WHERE id = '$id' AND owner_uid = " . $_SESSION["uid"]);
 		}
 		return;
@@ -37,11 +37,11 @@ class Pref_Feeds extends Handler_Protected {
 		// first one is set by API
 		$show_empty_cats = $_REQUEST['force_show_empty'] ||
 			($_REQUEST['mode'] != 2 && !$search &&
-				get_pref($this->link, '_PREFS_SHOW_EMPTY_CATS'));
+				get_pref( '_PREFS_SHOW_EMPTY_CATS'));
 
 		$items = array();
 
-		$result = db_query($this->link, "SELECT id, title FROM ttrss_feed_categories
+		$result = db_query( "SELECT id, title FROM ttrss_feed_categories
 				WHERE owner_uid = " . $_SESSION["uid"] . " AND parent_cat = '$cat_id' ORDER BY order_id, title");
 
 		while ($line = db_fetch_assoc($result)) {
@@ -65,7 +65,7 @@ class Pref_Feeds extends Handler_Protected {
 
 		}
 
-		$feed_result = db_query($this->link, "SELECT id, title, last_error,
+		$feed_result = db_query( "SELECT id, title, last_error,
 			".SUBSTRING_FOR_DATE."(last_updated,1,19) AS last_updated
 			FROM ttrss_feeds
 			WHERE cat_id = '$cat_id' AND owner_uid = ".$_SESSION["uid"].
@@ -80,7 +80,7 @@ class Pref_Feeds extends Handler_Protected {
 			$feed['unread'] = 0;
 			$feed['error'] = $feed_line['last_error'];
 			$feed['icon'] = getFeedIcon($feed_line['id']);
-			$feed['param'] = make_local_datetime($this->link,
+			$feed['param'] = make_local_datetime(
 				$feed_line['last_updated'], true);
 
 			array_push($items, $feed);
@@ -108,7 +108,7 @@ class Pref_Feeds extends Handler_Protected {
 		$root['items'] = array();
 		$root['type'] = 'category';
 
-		$enable_cats = get_pref($this->link, 'ENABLE_FEED_CATS');
+		$enable_cats = get_pref( 'ENABLE_FEED_CATS');
 
 		if ($_REQUEST['mode'] == 2) {
 
@@ -154,12 +154,12 @@ class Pref_Feeds extends Handler_Protected {
 				$root['items'] = array_merge($root['items'], $cat['items']);
 			}
 
-			$result = db_query($this->link, "SELECT * FROM
+			$result = db_query( "SELECT * FROM
 				ttrss_labels2 WHERE owner_uid = ".$_SESSION['uid']." ORDER by caption");
 
 			if (db_num_rows($result) > 0) {
 
-				if (get_pref($this->link, 'ENABLE_FEED_CATS')) {
+				if (get_pref( 'ENABLE_FEED_CATS')) {
 					$cat = $this->feedlist_init_cat(-2);
 				} else {
 					$cat['items'] = array();
@@ -188,9 +188,9 @@ class Pref_Feeds extends Handler_Protected {
 		if ($enable_cats) {
 			$show_empty_cats = $_REQUEST['force_show_empty'] ||
 				($_REQUEST['mode'] != 2 && !$search &&
-				get_pref($this->link, '_PREFS_SHOW_EMPTY_CATS'));
+				get_pref( '_PREFS_SHOW_EMPTY_CATS'));
 
-			$result = db_query($this->link, "SELECT id, title FROM ttrss_feed_categories
+			$result = db_query( "SELECT id, title FROM ttrss_feed_categories
 				WHERE owner_uid = " . $_SESSION["uid"] . " AND parent_cat IS NULL ORDER BY order_id, title");
 
 			while ($line = db_fetch_assoc($result)) {
@@ -226,7 +226,7 @@ class Pref_Feeds extends Handler_Protected {
 			$cat['unread'] = 0;
 			$cat['child_unread'] = 0;
 
-			$feed_result = db_query($this->link, "SELECT id, title,last_error,
+			$feed_result = db_query( "SELECT id, title,last_error,
 				".SUBSTRING_FOR_DATE."(last_updated,1,19) AS last_updated
 				FROM ttrss_feeds
 				WHERE cat_id IS NULL AND owner_uid = ".$_SESSION["uid"].
@@ -240,7 +240,7 @@ class Pref_Feeds extends Handler_Protected {
 				$feed['checkbox'] = false;
 				$feed['error'] = $feed_line['last_error'];
 				$feed['icon'] = getFeedIcon($feed_line['id']);
-				$feed['param'] = make_local_datetime($this->link,
+				$feed['param'] = make_local_datetime(
 					$feed_line['last_updated'], true);
 				$feed['unread'] = 0;
 				$feed['type'] = 'feed';
@@ -257,7 +257,7 @@ class Pref_Feeds extends Handler_Protected {
 			$root['param'] = vsprintf(_ngettext('(%d feed)', '(%d feeds)', count($cat['items'])), count($cat['items']));
 
 		} else {
-			$feed_result = db_query($this->link, "SELECT id, title, last_error,
+			$feed_result = db_query( "SELECT id, title, last_error,
 				".SUBSTRING_FOR_DATE."(last_updated,1,19) AS last_updated
 				FROM ttrss_feeds
 				WHERE owner_uid = ".$_SESSION["uid"].
@@ -271,7 +271,7 @@ class Pref_Feeds extends Handler_Protected {
 				$feed['checkbox'] = false;
 				$feed['error'] = $feed_line['last_error'];
 				$feed['icon'] = getFeedIcon($feed_line['id']);
-				$feed['param'] = make_local_datetime($this->link,
+				$feed['param'] = make_local_datetime(
 					$feed_line['last_updated'], true);
 				$feed['unread'] = 0;
 				$feed['type'] = 'feed';
@@ -296,20 +296,20 @@ class Pref_Feeds extends Handler_Protected {
 	}
 
 	function catsortreset() {
-		db_query($this->link, "UPDATE ttrss_feed_categories
+		db_query( "UPDATE ttrss_feed_categories
 				SET order_id = 0 WHERE owner_uid = " . $_SESSION["uid"]);
 		return;
 	}
 
 	function feedsortreset() {
-		db_query($this->link, "UPDATE ttrss_feeds
+		db_query( "UPDATE ttrss_feeds
 				SET order_id = 0 WHERE owner_uid = " . $_SESSION["uid"]);
 		return;
 	}
 
 	function togglehiddenfeedcats() {
-		set_pref($this->link, '_PREFS_SHOW_EMPTY_CATS',
-			(get_pref($this->link, '_PREFS_SHOW_EMPTY_CATS') ? 'false' : 'true'));
+		set_pref( '_PREFS_SHOW_EMPTY_CATS',
+			(get_pref( '_PREFS_SHOW_EMPTY_CATS') ? 'false' : 'true'));
 	}
 
 	private function process_category_order(&$data_map, $item_id, $parent_id = false, $nest_level = 0) {
@@ -326,12 +326,12 @@ class Pref_Feeds extends Handler_Protected {
 		if ($item_id != 'root') {
 			if ($parent_id && $parent_id != 'root') {
 				$parent_bare_id = substr($parent_id, strpos($parent_id, ':')+1);
-				$parent_qpart = db_escape_string($this->link, $parent_bare_id);
+				$parent_qpart = db_escape_string( $parent_bare_id);
 			} else {
 				$parent_qpart = 'NULL';
 			}
 
-			db_query($this->link, "UPDATE ttrss_feed_categories
+			db_query( "UPDATE ttrss_feed_categories
 				SET parent_cat = $parent_qpart WHERE id = '$bare_item_id' AND
 				owner_uid = " . $_SESSION["uid"]);
 		}
@@ -352,12 +352,12 @@ class Pref_Feeds extends Handler_Protected {
 					if (strpos($id, "FEED") === 0) {
 
 						$cat_id = ($item_id != "root") ?
-							db_escape_string($this->link, $bare_item_id) : "NULL";
+							db_escape_string( $bare_item_id) : "NULL";
 
 						$cat_qpart = ($cat_id != 0) ? "cat_id = '$cat_id'" :
 							"cat_id = NULL";
 
-						db_query($this->link, "UPDATE ttrss_feeds
+						db_query( "UPDATE ttrss_feeds
 							SET order_id = $order_id, $cat_qpart
 							WHERE id = '$bare_id' AND
 								owner_uid = " . $_SESSION["uid"]);
@@ -367,12 +367,12 @@ class Pref_Feeds extends Handler_Protected {
 							$nest_level+1);
 
 						if ($item_id != 'root') {
-							$parent_qpart = db_escape_string($this->link, $bare_id);
+							$parent_qpart = db_escape_string( $bare_id);
 						} else {
 							$parent_qpart = 'NULL';
 						}
 
-						db_query($this->link, "UPDATE ttrss_feed_categories
+						db_query( "UPDATE ttrss_feed_categories
 								SET order_id = '$order_id' WHERE id = '$bare_id' AND
 								owner_uid = " . $_SESSION["uid"]);
 					}
@@ -424,7 +424,7 @@ class Pref_Feeds extends Handler_Protected {
 				++$cat_order_id;
 
 				if ($bare_id > 0) {
-					db_query($this->link, "UPDATE ttrss_feed_categories
+					db_query( "UPDATE ttrss_feed_categories
 						SET order_id = '$cat_order_id' WHERE id = '$bare_id' AND
 						owner_uid = " . $_SESSION["uid"]);
 				}
@@ -441,7 +441,7 @@ class Pref_Feeds extends Handler_Protected {
 						else
 							$cat_query = "cat_id = NULL";
 
-						db_query($this->link, "UPDATE ttrss_feeds
+						db_query( "UPDATE ttrss_feeds
 							SET order_id = '$feed_order_id',
 							$cat_query
 							WHERE id = '$feed_id' AND
@@ -457,15 +457,15 @@ class Pref_Feeds extends Handler_Protected {
 	}
 
 	function removeicon() {
-		$feed_id = db_escape_string($this->link, $_REQUEST["feed_id"]);
+		$feed_id = db_escape_string( $_REQUEST["feed_id"]);
 
-		$result = db_query($this->link, "SELECT id FROM ttrss_feeds
+		$result = db_query( "SELECT id FROM ttrss_feeds
 			WHERE id = '$feed_id' AND owner_uid = ". $_SESSION["uid"]);
 
 		if (db_num_rows($result) != 0) {
 			@unlink(ICONS_DIR . "/$feed_id.ico");
 
-			db_query($this->link, "UPDATE ttrss_feeds SET favicon_avg_color = NULL
+			db_query( "UPDATE ttrss_feeds SET favicon_avg_color = NULL
 				where id = '$feed_id'");
 		}
 
@@ -491,12 +491,12 @@ class Pref_Feeds extends Handler_Protected {
 		}
 
 		$icon_file = $tmp_file;
-		$feed_id = db_escape_string($this->link, $_REQUEST["feed_id"]);
+		$feed_id = db_escape_string( $_REQUEST["feed_id"]);
 
 		if (is_file($icon_file) && $feed_id) {
 			if (filesize($icon_file) < 20000) {
 
-				$result = db_query($this->link, "SELECT id FROM ttrss_feeds
+				$result = db_query( "SELECT id FROM ttrss_feeds
 					WHERE id = '$feed_id' AND owner_uid = ". $_SESSION["uid"]);
 
 				if (db_num_rows($result) != 0) {
@@ -505,10 +505,10 @@ class Pref_Feeds extends Handler_Protected {
 
 						require_once "colors.php";
 
-						$favicon_color = db_escape_string($this->link,
+						$favicon_color = db_escape_string(
 							calculate_avg_color(ICONS_DIR . "/$feed_id.ico"));
 
-						db_query($this->link, "UPDATE ttrss_feeds SET
+						db_query( "UPDATE ttrss_feeds SET
 							favicon_avg_color = '$favicon_color'
 							WHERE id = '$feed_id'");
 
@@ -536,9 +536,9 @@ class Pref_Feeds extends Handler_Protected {
 		global $purge_intervals;
 		global $update_intervals;
 
-		$feed_id = db_escape_string($this->link, $_REQUEST["id"]);
+		$feed_id = db_escape_string( $_REQUEST["id"]);
 
-		$result = db_query($this->link,
+		$result = db_query(
 			"SELECT * FROM ttrss_feeds WHERE id = '$feed_id' AND
 				owner_uid = " . $_SESSION["uid"]);
 
@@ -585,7 +585,7 @@ class Pref_Feeds extends Handler_Protected {
 
 		/* Category */
 
-		if (get_pref($this->link, 'ENABLE_FEED_CATS')) {
+		if (get_pref( 'ENABLE_FEED_CATS')) {
 
 			$cat_id = db_fetch_result($result, 0, "cat_id");
 
@@ -593,7 +593,7 @@ class Pref_Feeds extends Handler_Protected {
 
 			print __('Place in category:') . " ";
 
-			print_feed_cat_select($this->link, "cat_id", $cat_id,
+			print_feed_cat_select( "cat_id", $cat_id,
 				'dojoType="dijit.form.Select"');
 		}
 
@@ -782,7 +782,7 @@ class Pref_Feeds extends Handler_Protected {
 		global $purge_intervals;
 		global $update_intervals;
 
-		$feed_ids = db_escape_string($this->link, $_REQUEST["ids"]);
+		$feed_ids = db_escape_string( $_REQUEST["ids"]);
 
 		print_notice("Enable the options you wish to apply using checkboxes on the right:");
 
@@ -816,13 +816,13 @@ class Pref_Feeds extends Handler_Protected {
 
 		/* Category */
 
-		if (get_pref($this->link, 'ENABLE_FEED_CATS')) {
+		if (get_pref( 'ENABLE_FEED_CATS')) {
 
 			print "<br/>";
 
 			print __('Place in category:') . " ";
 
-			print_feed_cat_select($this->link, "cat_id", $cat_id,
+			print_feed_cat_select( "cat_id", $cat_id,
 				'disabled="1" dojoType="dijit.form.Select"');
 
 			$this->batch_edit_cbox("cat_id");
@@ -938,27 +938,27 @@ class Pref_Feeds extends Handler_Protected {
 
 	function editsaveops($batch) {
 
-		$feed_title = db_escape_string($this->link, trim($_POST["title"]));
-		$feed_link = db_escape_string($this->link, trim($_POST["feed_url"]));
-		$upd_intl = (int) db_escape_string($this->link, $_POST["update_interval"]);
-		$purge_intl = (int) db_escape_string($this->link, $_POST["purge_interval"]);
-		$feed_id = (int) db_escape_string($this->link, $_POST["id"]); /* editSave */
-		$feed_ids = db_escape_string($this->link, $_POST["ids"]); /* batchEditSave */
-		$cat_id = (int) db_escape_string($this->link, $_POST["cat_id"]);
-		$auth_login = db_escape_string($this->link, trim($_POST["auth_login"]));
+		$feed_title = db_escape_string( trim($_POST["title"]));
+		$feed_link = db_escape_string( trim($_POST["feed_url"]));
+		$upd_intl = (int) db_escape_string( $_POST["update_interval"]);
+		$purge_intl = (int) db_escape_string( $_POST["purge_interval"]);
+		$feed_id = (int) db_escape_string( $_POST["id"]); /* editSave */
+		$feed_ids = db_escape_string( $_POST["ids"]); /* batchEditSave */
+		$cat_id = (int) db_escape_string( $_POST["cat_id"]);
+		$auth_login = db_escape_string( trim($_POST["auth_login"]));
 		$auth_pass = trim($_POST["auth_pass"]);
-		$private = checkbox_to_sql_bool(db_escape_string($this->link, $_POST["private"]));
+		$private = checkbox_to_sql_bool(db_escape_string( $_POST["private"]));
 		$include_in_digest = checkbox_to_sql_bool(
-			db_escape_string($this->link, $_POST["include_in_digest"]));
+			db_escape_string( $_POST["include_in_digest"]));
 		$cache_images = checkbox_to_sql_bool(
-			db_escape_string($this->link, $_POST["cache_images"]));
+			db_escape_string( $_POST["cache_images"]));
 		$hide_images = checkbox_to_sql_bool(
-			db_escape_string($this->link, $_POST["hide_images"]));
+			db_escape_string( $_POST["hide_images"]));
 		$always_display_enclosures = checkbox_to_sql_bool(
-			db_escape_string($this->link, $_POST["always_display_enclosures"]));
+			db_escape_string( $_POST["always_display_enclosures"]));
 
 		$mark_unread_on_update = checkbox_to_sql_bool(
-			db_escape_string($this->link, $_POST["mark_unread_on_update"]));
+			db_escape_string( $_POST["mark_unread_on_update"]));
 
 		if (strlen(FEED_CRYPT_KEY) > 0) {
 			require_once "crypt.php";
@@ -968,9 +968,9 @@ class Pref_Feeds extends Handler_Protected {
 			$auth_pass_encrypted = 'false';
 		}
 
-		$auth_pass = db_escape_string($this->link, $auth_pass);
+		$auth_pass = db_escape_string( $auth_pass);
 
-		if (get_pref($this->link, 'ENABLE_FEED_CATS')) {
+		if (get_pref( 'ENABLE_FEED_CATS')) {
 			if ($cat_id && $cat_id != 0) {
 				$category_qpart = "cat_id = '$cat_id',";
 				$category_qpart_nocomma = "cat_id = '$cat_id'";
@@ -985,7 +985,7 @@ class Pref_Feeds extends Handler_Protected {
 
 		if (!$batch) {
 
-			$result = db_query($this->link, "UPDATE ttrss_feeds SET
+			$result = db_query( "UPDATE ttrss_feeds SET
 				$category_qpart
 				title = '$feed_title', feed_url = '$feed_link',
 				update_interval = '$upd_intl',
@@ -1010,7 +1010,7 @@ class Pref_Feeds extends Handler_Protected {
 				}
 			}
 
-			db_query($this->link, "BEGIN");
+			db_query( "BEGIN");
 
 			foreach (array_keys($feed_data) as $k) {
 
@@ -1073,23 +1073,23 @@ class Pref_Feeds extends Handler_Protected {
 				}
 
 				if ($qpart) {
-					db_query($this->link,
+					db_query(
 						"UPDATE ttrss_feeds SET $qpart WHERE id IN ($feed_ids)
 						AND owner_uid = " . $_SESSION["uid"]);
 					print "<br/>";
 				}
 			}
 
-			db_query($this->link, "COMMIT");
+			db_query( "COMMIT");
 		}
 		return;
 	}
 
 	function resetPubSub() {
 
-		$ids = db_escape_string($this->link, $_REQUEST["ids"]);
+		$ids = db_escape_string( $_REQUEST["ids"]);
 
-		db_query($this->link, "UPDATE ttrss_feeds SET pubsub_state = 0 WHERE id IN ($ids)
+		db_query( "UPDATE ttrss_feeds SET pubsub_state = 0 WHERE id IN ($ids)
 			AND owner_uid = " . $_SESSION["uid"]);
 
 		return;
@@ -1097,30 +1097,30 @@ class Pref_Feeds extends Handler_Protected {
 
 	function remove() {
 
-		$ids = explode(",", db_escape_string($this->link, $_REQUEST["ids"]));
+		$ids = explode(",", db_escape_string( $_REQUEST["ids"]));
 
 		foreach ($ids as $id) {
-			Pref_Feeds::remove_feed($this->link, $id, $_SESSION["uid"]);
+			Pref_Feeds::remove_feed( $id, $_SESSION["uid"]);
 		}
 
 		return;
 	}
 
 	function clear() {
-		$id = db_escape_string($this->link, $_REQUEST["id"]);
-		$this->clear_feed_articles($this->link, $id);
+		$id = db_escape_string( $_REQUEST["id"]);
+		$this->clear_feed_articles( $id);
 	}
 
 	function rescore() {
 		require_once "rssfuncs.php";
 
-		$ids = explode(",", db_escape_string($this->link, $_REQUEST["ids"]));
+		$ids = explode(",", db_escape_string( $_REQUEST["ids"]));
 
 		foreach ($ids as $id) {
 
-			$filters = load_filters($this->link, $id, $_SESSION["uid"], 6);
+			$filters = load_filters( $id, $_SESSION["uid"], 6);
 
-			$result = db_query($this->link, "SELECT
+			$result = db_query( "SELECT
 				title, content, link, ref_id, author,".
 				SUBSTRING_FOR_DATE."(updated, 1, 19) AS updated
 			  	FROM
@@ -1133,7 +1133,7 @@ class Pref_Feeds extends Handler_Protected {
 
 			while ($line = db_fetch_assoc($result)) {
 
-				$tags = get_article_tags($this->link, $line["ref_id"]);
+				$tags = get_article_tags( $line["ref_id"]);
 
 				$article_filters = get_article_filters($filters, $line['title'],
 					$line['content'], $line['link'], strtotime($line['updated']),
@@ -1148,15 +1148,15 @@ class Pref_Feeds extends Handler_Protected {
 
 			foreach (array_keys($scores) as $s) {
 				if ($s > 1000) {
-					db_query($this->link, "UPDATE ttrss_user_entries SET score = '$s',
+					db_query( "UPDATE ttrss_user_entries SET score = '$s',
 						marked = true WHERE
 						ref_id IN (" . join(',', $scores[$s]) . ")");
 				} else if ($s < -500) {
-					db_query($this->link, "UPDATE ttrss_user_entries SET score = '$s',
+					db_query( "UPDATE ttrss_user_entries SET score = '$s',
 						unread = false WHERE
 						ref_id IN (" . join(',', $scores[$s]) . ")");
 				} else {
-					db_query($this->link, "UPDATE ttrss_user_entries SET score = '$s' WHERE
+					db_query( "UPDATE ttrss_user_entries SET score = '$s' WHERE
 						ref_id IN (" . join(',', $scores[$s]) . ")");
 				}
 			}
@@ -1168,16 +1168,16 @@ class Pref_Feeds extends Handler_Protected {
 
 	function rescoreAll() {
 
-		$result = db_query($this->link,
+		$result = db_query(
 			"SELECT id FROM ttrss_feeds WHERE owner_uid = " . $_SESSION['uid']);
 
 		while ($feed_line = db_fetch_assoc($result)) {
 
 			$id = $feed_line["id"];
 
-			$filters = load_filters($this->link, $id, $_SESSION["uid"], 6);
+			$filters = load_filters( $id, $_SESSION["uid"], 6);
 
-			$tmp_result = db_query($this->link, "SELECT
+			$tmp_result = db_query( "SELECT
 				title, content, link, ref_id, author,".
 				  	SUBSTRING_FOR_DATE."(updated, 1, 19) AS updated
 					FROM
@@ -1190,7 +1190,7 @@ class Pref_Feeds extends Handler_Protected {
 
 			while ($line = db_fetch_assoc($tmp_result)) {
 
-				$tags = get_article_tags($this->link, $line["ref_id"]);
+				$tags = get_article_tags( $line["ref_id"]);
 
 				$article_filters = get_article_filters($filters, $line['title'],
 					$line['content'], $line['link'], strtotime($line['updated']),
@@ -1205,11 +1205,11 @@ class Pref_Feeds extends Handler_Protected {
 
 			foreach (array_keys($scores) as $s) {
 				if ($s > 1000) {
-					db_query($this->link, "UPDATE ttrss_user_entries SET score = '$s',
+					db_query( "UPDATE ttrss_user_entries SET score = '$s',
 						marked = true WHERE
 						ref_id IN (" . join(',', $scores[$s]) . ")");
 				} else {
-					db_query($this->link, "UPDATE ttrss_user_entries SET score = '$s' WHERE
+					db_query( "UPDATE ttrss_user_entries SET score = '$s' WHERE
 						ref_id IN (" . join(',', $scores[$s]) . ")");
 				}
 			}
@@ -1220,9 +1220,9 @@ class Pref_Feeds extends Handler_Protected {
 	}
 
 	function categorize() {
-		$ids = explode(",", db_escape_string($this->link, $_REQUEST["ids"]));
+		$ids = explode(",", db_escape_string( $_REQUEST["ids"]));
 
-		$cat_id = db_escape_string($this->link, $_REQUEST["cat_id"]);
+		$cat_id = db_escape_string( $_REQUEST["cat_id"]);
 
 		if ($cat_id == 0) {
 			$cat_id_qpart = 'NULL';
@@ -1230,30 +1230,30 @@ class Pref_Feeds extends Handler_Protected {
 			$cat_id_qpart = "'$cat_id'";
 		}
 
-		db_query($this->link, "BEGIN");
+		db_query( "BEGIN");
 
 		foreach ($ids as $id) {
 
-			db_query($this->link, "UPDATE ttrss_feeds SET cat_id = $cat_id_qpart
+			db_query( "UPDATE ttrss_feeds SET cat_id = $cat_id_qpart
 				WHERE id = '$id'
 			  	AND owner_uid = " . $_SESSION["uid"]);
 
 		}
 
-		db_query($this->link, "COMMIT");
+		db_query( "COMMIT");
 	}
 
 	function removeCat() {
-		$ids = explode(",", db_escape_string($this->link, $_REQUEST["ids"]));
+		$ids = explode(",", db_escape_string( $_REQUEST["ids"]));
 		foreach ($ids as $id) {
-			$this->remove_feed_category($this->link, $id, $_SESSION["uid"]);
+			$this->remove_feed_category( $id, $_SESSION["uid"]);
 		}
 	}
 
 	function addCat() {
-		$feed_cat = db_escape_string($this->link, trim($_REQUEST["cat"]));
+		$feed_cat = db_escape_string( trim($_REQUEST["cat"]));
 
-		add_feed_category($this->link, $feed_cat);
+		add_feed_category( $feed_cat);
 	}
 
 	function index() {
@@ -1261,7 +1261,7 @@ class Pref_Feeds extends Handler_Protected {
 		print "<div dojoType=\"dijit.layout.AccordionContainer\" region=\"center\">";
 		print "<div id=\"pref-feeds-feeds\" dojoType=\"dijit.layout.AccordionPane\" title=\"".__('Feeds')."\">";
 
-		$result = db_query($this->link, "SELECT COUNT(id) AS num_errors
+		$result = db_query( "SELECT COUNT(id) AS num_errors
 			FROM ttrss_feeds WHERE last_error != '' AND owner_uid = ".$_SESSION["uid"]);
 
 		$num_errors = db_fetch_result($result, 0, "num_errors");
@@ -1279,7 +1279,7 @@ class Pref_Feeds extends Handler_Protected {
 			$interval_qpart = "DATE_SUB(NOW(), INTERVAL 3 MONTH)";
 		}
 
-		$result = db_query($this->link, "SELECT COUNT(*) AS num_inactive FROM ttrss_feeds WHERE
+		$result = db_query( "SELECT COUNT(*) AS num_inactive FROM ttrss_feeds WHERE
 					(SELECT MAX(updated) FROM ttrss_entries, ttrss_user_entries WHERE
 						ttrss_entries.id = ref_id AND
 							ttrss_user_entries.feed_id = ttrss_feeds.id) < $interval_qpart AND
@@ -1293,7 +1293,7 @@ class Pref_Feeds extends Handler_Protected {
 					__("Inactive feeds") . "</button>";
 		}
 
-		$feed_search = db_escape_string($this->link, $_REQUEST["search"]);
+		$feed_search = db_escape_string( $_REQUEST["search"]);
 
 		if (array_key_exists("search", $_REQUEST)) {
 			$_SESSION["prefs_feed_search"] = $feed_search;
@@ -1336,7 +1336,7 @@ class Pref_Feeds extends Handler_Protected {
 			.__('Unsubscribe')."</div> ";
 		print "</div></div>";
 
-		if (get_pref($this->link, 'ENABLE_FEED_CATS')) {
+		if (get_pref( 'ENABLE_FEED_CATS')) {
 			print "<div dojoType=\"dijit.form.DropDownButton\">".
 					"<span>" . __('Categories')."</span>";
 			print "<div dojoType=\"dijit.Menu\" style=\"display: none;\">";
@@ -1522,14 +1522,14 @@ class Pref_Feeds extends Handler_Protected {
 		$cat_id = (int) $cat_id;
 
 		if ($cat_id > 0) {
-			$cat_unread = ccache_find($this->link, $cat_id, $_SESSION["uid"], true);
+			$cat_unread = ccache_find( $cat_id, $_SESSION["uid"], true);
 		} else if ($cat_id == 0 || $cat_id == -2) {
-			$cat_unread = getCategoryUnread($this->link, $cat_id);
+			$cat_unread = getCategoryUnread( $cat_id);
 		}
 
 		$obj['id'] = 'CAT:' . $cat_id;
 		$obj['items'] = array();
-		$obj['name'] = getCategoryTitle($this->link, $cat_id);
+		$obj['name'] = getCategoryTitle( $cat_id);
 		$obj['type'] = 'category';
 		$obj['unread'] = (int) $cat_unread;
 		$obj['bare_id'] = $cat_id;
@@ -1542,10 +1542,10 @@ class Pref_Feeds extends Handler_Protected {
 		$feed_id = (int) $feed_id;
 
 		if (!$title)
-			$title = getFeedTitle($this->link, $feed_id, false);
+			$title = getFeedTitle( $feed_id, false);
 
 		if ($unread === false)
-			$unread = getFeedUnread($this->link, $feed_id, false);
+			$unread = getFeedUnread( $feed_id, false);
 
 		$obj['id'] = 'FEED:' . $feed_id;
 		$obj['name'] = $title;
@@ -1567,7 +1567,7 @@ class Pref_Feeds extends Handler_Protected {
 			$interval_qpart = "DATE_SUB(NOW(), INTERVAL 3 MONTH)";
 		}
 
-		$result = db_query($this->link, "SELECT ttrss_feeds.title, ttrss_feeds.site_url,
+		$result = db_query( "SELECT ttrss_feeds.title, ttrss_feeds.site_url,
 		  		ttrss_feeds.feed_url, ttrss_feeds.id, MAX(updated) AS last_article
 			FROM ttrss_feeds, ttrss_entries, ttrss_user_entries WHERE
 				(SELECT MAX(updated) FROM ttrss_entries, ttrss_user_entries WHERE
@@ -1621,7 +1621,7 @@ class Pref_Feeds extends Handler_Protected {
 				htmlspecialchars($line["title"])."</a>";
 
 			print "</td><td class=\"insensitive\" align='right'>";
-			print make_local_datetime($this->link, $line['last_article'], false);
+			print make_local_datetime( $line['last_article'], false);
 			print "</td>";
 			print "</tr>";
 
@@ -1648,7 +1648,7 @@ class Pref_Feeds extends Handler_Protected {
 		print "<h2>" . __("These feeds have not been updated because of errors:") .
 			"</h2>";
 
-		$result = db_query($this->link, "SELECT id,title,feed_url,last_error,site_url
+		$result = db_query( "SELECT id,title,feed_url,last_error,site_url
 		FROM ttrss_feeds WHERE last_error != '' AND owner_uid = ".$_SESSION["uid"]);
 
 		print "<div dojoType=\"dijit.Toolbar\">";
@@ -1722,53 +1722,53 @@ class Pref_Feeds extends Handler_Protected {
 	 * @param integer $id The id of the feed to purge.
 	 * @return void
 	 */
-	private function clear_feed_articles($link, $id) {
+	private function clear_feed_articles($id) {
 
 		if ($id != 0) {
-			$result = db_query($link, "DELETE FROM ttrss_user_entries
+			$result = db_query( "DELETE FROM ttrss_user_entries
 			WHERE feed_id = '$id' AND marked = false AND owner_uid = " . $_SESSION["uid"]);
 		} else {
-			$result = db_query($link, "DELETE FROM ttrss_user_entries
+			$result = db_query( "DELETE FROM ttrss_user_entries
 			WHERE feed_id IS NULL AND marked = false AND owner_uid = " . $_SESSION["uid"]);
 		}
 
-		$result = db_query($link, "DELETE FROM ttrss_entries WHERE
+		$result = db_query( "DELETE FROM ttrss_entries WHERE
 			(SELECT COUNT(int_id) FROM ttrss_user_entries WHERE ref_id = id) = 0");
 
-		ccache_update($link, $id, $_SESSION['uid']);
+		ccache_update( $id, $_SESSION['uid']);
 	} // function clear_feed_articles
 
-	private function remove_feed_category($link, $id, $owner_uid) {
+	private function remove_feed_category( $id, $owner_uid) {
 
-		db_query($link, "DELETE FROM ttrss_feed_categories
+		db_query( "DELETE FROM ttrss_feed_categories
 			WHERE id = '$id' AND owner_uid = $owner_uid");
 
-		ccache_remove($link, $id, $owner_uid, true);
+		ccache_remove( $id, $owner_uid, true);
 	}
 
-	static function remove_feed($link, $id, $owner_uid) {
+	static function remove_feed( $id, $owner_uid) {
 
 		if ($id > 0) {
 
 			/* save starred articles in Archived feed */
 
-			db_query($link, "BEGIN");
+			db_query( "BEGIN");
 
 			/* prepare feed if necessary */
 
-			$result = db_query($link, "SELECT feed_url FROM ttrss_feeds WHERE id = $id
+			$result = db_query( "SELECT feed_url FROM ttrss_feeds WHERE id = $id
 				AND owner_uid = $owner_uid");
 
-			$feed_url = db_escape_string($link, db_fetch_result($result, 0, "feed_url"));
+			$feed_url = db_escape_string( db_fetch_result($result, 0, "feed_url"));
 
-			$result = db_query($link, "SELECT id FROM ttrss_archived_feeds
+			$result = db_query( "SELECT id FROM ttrss_archived_feeds
 				WHERE feed_url = '$feed_url' AND owner_uid = $owner_uid");
 
 			if (db_num_rows($result) == 0) {
-				$result = db_query($link, "SELECT MAX(id) AS id FROM ttrss_archived_feeds");
+				$result = db_query( "SELECT MAX(id) AS id FROM ttrss_archived_feeds");
 				$new_feed_id = (int)db_fetch_result($result, 0, "id") + 1;
 
-				db_query($link, "INSERT INTO ttrss_archived_feeds
+				db_query( "INSERT INTO ttrss_archived_feeds
 					(id, owner_uid, title, feed_url, site_url)
 				SELECT $new_feed_id, owner_uid, title, feed_url, site_url from ttrss_feeds
 				WHERE id = '$id'");
@@ -1778,31 +1778,31 @@ class Pref_Feeds extends Handler_Protected {
 				$archive_id = db_fetch_result($result, 0, "id");
 			}
 
-			db_query($link, "UPDATE ttrss_user_entries SET feed_id = NULL,
+			db_query( "UPDATE ttrss_user_entries SET feed_id = NULL,
 				orig_feed_id = '$archive_id' WHERE feed_id = '$id' AND
 					marked = true AND owner_uid = $owner_uid");
 
 			/* Remove access key for the feed */
 
-			db_query($link, "DELETE FROM ttrss_access_keys WHERE
+			db_query( "DELETE FROM ttrss_access_keys WHERE
 				feed_id = '$id' AND owner_uid = $owner_uid");
 
 			/* remove the feed */
 
-			db_query($link, "DELETE FROM ttrss_feeds
+			db_query( "DELETE FROM ttrss_feeds
 					WHERE id = '$id' AND owner_uid = $owner_uid");
 
-			db_query($link, "COMMIT");
+			db_query( "COMMIT");
 
 			if (file_exists(ICONS_DIR . "/$id.ico")) {
 				unlink(ICONS_DIR . "/$id.ico");
 			}
 
-			ccache_remove($link, $id, $owner_uid);
+			ccache_remove( $id, $owner_uid);
 
 		} else {
-			label_remove($link, feed_to_label_id($id), $owner_uid);
-			//ccache_remove($link, $id, $owner_uid); don't think labels are cached
+			label_remove( feed_to_label_id($id), $owner_uid);
+			//ccache_remove( $id, $owner_uid); don't think labels are cached
 		}
 	}
 
@@ -1813,9 +1813,9 @@ class Pref_Feeds extends Handler_Protected {
 		print "<table width='100%'><tr><td>
 			".__("Add one valid RSS feed per line (no feed detection is done)")."
 		</td><td align='right'>";
-		if (get_pref($this->link, 'ENABLE_FEED_CATS')) {
+		if (get_pref( 'ENABLE_FEED_CATS')) {
 			print __('Place in category:') . " ";
-			print_feed_cat_select($this->link, "cat", false, 'dojoType="dijit.form.Select"');
+			print_feed_cat_select( "cat", false, 'dojoType="dijit.form.Select"');
 		}
 		print "</td></tr><tr><td colspan='2'>";
 		print "<textarea
@@ -1855,17 +1855,17 @@ class Pref_Feeds extends Handler_Protected {
 	}
 
 	function batchAddFeeds() {
-		$cat_id = db_escape_string($this->link, $_REQUEST['cat']);
+		$cat_id = db_escape_string( $_REQUEST['cat']);
 		$feeds = explode("\n", $_REQUEST['feeds']);
-		$login = db_escape_string($this->link, $_REQUEST['login']);
+		$login = db_escape_string( $_REQUEST['login']);
 		$pass = trim($_REQUEST['pass']);
 
 		foreach ($feeds as $feed) {
-			$feed = db_escape_string($this->link, trim($feed));
+			$feed = db_escape_string( trim($feed));
 
 			if (validate_feed_url($feed)) {
 
-				db_query($this->link, "BEGIN");
+				db_query( "BEGIN");
 
 				if ($cat_id == "0" || !$cat_id) {
 					$cat_qpart = "NULL";
@@ -1873,7 +1873,7 @@ class Pref_Feeds extends Handler_Protected {
 					$cat_qpart = "'$cat_id'";
 				}
 
-				$result = db_query($this->link,
+				$result = db_query(
 					"SELECT id FROM ttrss_feeds
 					WHERE feed_url = '$feed' AND owner_uid = ".$_SESSION["uid"]);
 
@@ -1885,66 +1885,66 @@ class Pref_Feeds extends Handler_Protected {
 					$auth_pass_encrypted = 'false';
 				}
 
-				$pass = db_escape_string($this->link, $pass);
+				$pass = db_escape_string( $pass);
 
 				if (db_num_rows($result) == 0) {
-					$result = db_query($this->link,
+					$result = db_query(
 						"INSERT INTO ttrss_feeds
 							(owner_uid,feed_url,title,cat_id,auth_login,auth_pass,update_method,auth_pass_encrypted)
 						VALUES ('".$_SESSION["uid"]."', '$feed',
 							'[Unknown]', $cat_qpart, '$login', '$pass', 0, $auth_pass_encrypted)");
 				}
 
-				db_query($this->link, "COMMIT");
+				db_query( "COMMIT");
 			}
 		}
 	}
 
 	function regenOPMLKey() {
-		$this->update_feed_access_key($this->link, 'OPML:Publish',
+		$this->update_feed_access_key( 'OPML:Publish',
 		false, $_SESSION["uid"]);
 
-		$new_link = Opml::opml_publish_url($this->link);
+		$new_link = Opml::opml_publish_url();
 
 		print json_encode(array("link" => $new_link));
 	}
 
 	function regenFeedKey() {
-		$feed_id = db_escape_string($this->link, $_REQUEST['id']);
-		$is_cat = db_escape_string($this->link, $_REQUEST['is_cat']) == "true";
+		$feed_id = db_escape_string( $_REQUEST['id']);
+		$is_cat = db_escape_string( $_REQUEST['is_cat']) == "true";
 
-		$new_key = $this->update_feed_access_key($this->link, $feed_id, $is_cat);
+		$new_key = $this->update_feed_access_key( $feed_id, $is_cat);
 
 		print json_encode(array("link" => $new_key));
 	}
 
 
-	private function update_feed_access_key($link, $feed_id, $is_cat, $owner_uid = false) {
+	private function update_feed_access_key( $feed_id, $is_cat, $owner_uid = false) {
 		if (!$owner_uid) $owner_uid = $_SESSION["uid"];
 
 		$sql_is_cat = bool_to_sql_bool($is_cat);
 
-		$result = db_query($link, "SELECT access_key FROM ttrss_access_keys
+		$result = db_query( "SELECT access_key FROM ttrss_access_keys
 			WHERE feed_id = '$feed_id'	AND is_cat = $sql_is_cat
 			AND owner_uid = " . $owner_uid);
 
 		if (db_num_rows($result) == 1) {
-			$key = db_escape_string($this->link, sha1(uniqid(rand(), true)));
+			$key = db_escape_string( sha1(uniqid(rand(), true)));
 
-			db_query($link, "UPDATE ttrss_access_keys SET access_key = '$key'
+			db_query( "UPDATE ttrss_access_keys SET access_key = '$key'
 				WHERE feed_id = '$feed_id' AND is_cat = $sql_is_cat
 				AND owner_uid = " . $owner_uid);
 
 			return $key;
 
 		} else {
-			return get_feed_access_key($link, $feed_id, $is_cat, $owner_uid);
+			return get_feed_access_key( $feed_id, $is_cat, $owner_uid);
 		}
 	}
 
 	// Silent
 	function clearKeys() {
-		db_query($this->link, "DELETE FROM ttrss_access_keys WHERE
+		db_query( "DELETE FROM ttrss_access_keys WHERE
 			owner_uid = " . $_SESSION["uid"]);
 	}
 
diff --git a/classes/pref/filters.php b/classes/pref/filters.php
index 586626dd7..12c2f271c 100644
--- a/classes/pref/filters.php
+++ b/classes/pref/filters.php
@@ -9,7 +9,7 @@ class Pref_Filters extends Handler_Protected {
 	}
 
 	function filtersortreset() {
-		db_query($this->link, "UPDATE ttrss_filters2
+		db_query( "UPDATE ttrss_filters2
 				SET order_id = 0 WHERE owner_uid = " . $_SESSION["uid"]);
 		return;
 	}
@@ -31,7 +31,7 @@ class Pref_Filters extends Handler_Protected {
 
 				if ($filter_id > 0) {
 
-					db_query($this->link, "UPDATE ttrss_filters2 SET
+					db_query( "UPDATE ttrss_filters2 SET
 						order_id = $index WHERE id = '$filter_id' AND
 						owner_uid = " .$_SESSION["uid"]);
 
@@ -49,13 +49,13 @@ class Pref_Filters extends Handler_Protected {
 
 		$filter["enabled"] = true;
 		$filter["match_any_rule"] = sql_bool_to_bool(
-			checkbox_to_sql_bool(db_escape_string($this->link, $_REQUEST["match_any_rule"])));
+			checkbox_to_sql_bool(db_escape_string( $_REQUEST["match_any_rule"])));
 		$filter["inverse"] = sql_bool_to_bool(
-			checkbox_to_sql_bool(db_escape_string($this->link, $_REQUEST["inverse"])));
+			checkbox_to_sql_bool(db_escape_string( $_REQUEST["inverse"])));
 
 		$filter["rules"] = array();
 
-		$result = db_query($this->link, "SELECT id,name FROM ttrss_filter_types");
+		$result = db_query( "SELECT id,name FROM ttrss_filter_types");
 
 		$filter_types = array();
 		while ($line = db_fetch_assoc($result)) {
@@ -83,9 +83,9 @@ class Pref_Filters extends Handler_Protected {
 			}
 		}
 
-		$feed_title = getFeedTitle($this->link, $feed);
+		$feed_title = getFeedTitle( $feed);
 
-		$qfh_ret = queryFeedHeadlines($this->link, -4, 30, "", false, false, false,
+		$qfh_ret = queryFeedHeadlines( -4, 30, "", false, false, false,
 			"date_entered DESC", 0, $_SESSION["uid"], $filter);
 
 		$result = $qfh_ret[0];
@@ -101,7 +101,7 @@ class Pref_Filters extends Handler_Protected {
 		while ($line = db_fetch_assoc($result)) {
 
 			$entry_timestamp = strtotime($line["updated"]);
-			$entry_tags = get_article_tags($this->link, $line["id"], $_SESSION["uid"]);
+			$entry_tags = get_article_tags( $line["id"], $_SESSION["uid"]);
 
 			$content_preview = truncate_string(
 				strip_tags($line["content_preview"]), 100, '...');
@@ -158,7 +158,7 @@ class Pref_Filters extends Handler_Protected {
 
 		$filter_search = $_SESSION["prefs_filter_search"];
 
-		$result = db_query($this->link, "SELECT *,
+		$result = db_query( "SELECT *,
 			(SELECT action_param FROM ttrss_filters2_actions
 				WHERE filter_id = ttrss_filters2.id ORDER BY id LIMIT 1) AS action_param,
 			(SELECT action_id FROM ttrss_filters2_actions
@@ -194,7 +194,7 @@ class Pref_Filters extends Handler_Protected {
 
 			$match_ok = false;
 			if ($filter_search) {
-				$rules_result = db_query($this->link,
+				$rules_result = db_query(
 					"SELECT reg_exp FROM ttrss_filters2_rules WHERE filter_id = ".$line["id"]);
 
 				while ($rule_line = db_fetch_assoc($rules_result)) {
@@ -206,8 +206,8 @@ class Pref_Filters extends Handler_Protected {
 			}
 
 			if ($line['action_id'] == 7) {
-				$label_result = db_query($this->link, "SELECT fg_color, bg_color
-					FROM ttrss_labels2 WHERE caption = '".db_escape_string($this->link, $line['action_param'])."' AND
+				$label_result = db_query( "SELECT fg_color, bg_color
+					FROM ttrss_labels2 WHERE caption = '".db_escape_string( $line['action_param'])."' AND
 						owner_uid = " . $_SESSION["uid"]);
 
 				if (db_num_rows($label_result) > 0) {
@@ -248,9 +248,9 @@ class Pref_Filters extends Handler_Protected {
 
 	function edit() {
 
-		$filter_id = db_escape_string($this->link, $_REQUEST["id"]);
+		$filter_id = db_escape_string( $_REQUEST["id"]);
 
-		$result = db_query($this->link,
+		$result = db_query(
 			"SELECT * FROM ttrss_filters2 WHERE id = '$filter_id' AND owner_uid = " . $_SESSION["uid"]);
 
 		$enabled = sql_bool_to_bool(db_fetch_result($result, 0, "enabled"));
@@ -294,7 +294,7 @@ class Pref_Filters extends Handler_Protected {
 
 		print "<ul id='filterDlg_Matches'>";
 
-		$rules_result = db_query($this->link, "SELECT * FROM ttrss_filters2_rules
+		$rules_result = db_query( "SELECT * FROM ttrss_filters2_rules
 			WHERE filter_id = '$filter_id' ORDER BY reg_exp, id");
 
 		while ($line = db_fetch_assoc($rules_result)) {
@@ -342,7 +342,7 @@ class Pref_Filters extends Handler_Protected {
 
 		print "<ul id='filterDlg_Actions'>";
 
-		$actions_result = db_query($this->link, "SELECT * FROM ttrss_filters2_actions
+		$actions_result = db_query( "SELECT * FROM ttrss_filters2_actions
 			WHERE filter_id = '$filter_id' ORDER BY id");
 
 		while ($line = db_fetch_assoc($actions_result)) {
@@ -417,17 +417,17 @@ class Pref_Filters extends Handler_Protected {
 
 		if (strpos($feed_id, "CAT:") === 0) {
 			$feed_id = (int) substr($feed_id, 4);
-			$feed = getCategoryTitle($this->link, $feed_id);
+			$feed = getCategoryTitle( $feed_id);
 		} else {
 			$feed_id = (int) $feed_id;
 
 			if ($rule["feed_id"])
-				$feed = getFeedTitle($this->link, (int)$rule["feed_id"]);
+				$feed = getFeedTitle( (int)$rule["feed_id"]);
 			else
 				$feed = __("All feeds");
 		}
 
-		$result = db_query($this->link, "SELECT description FROM ttrss_filter_types
+		$result = db_query( "SELECT description FROM ttrss_filter_types
 			WHERE id = ".(int)$rule["filter_type"]);
 		$filter_type = db_fetch_result($result, 0, "description");
 
@@ -440,7 +440,7 @@ class Pref_Filters extends Handler_Protected {
 	}
 
 	private function getActionName($action) {
-		$result = db_query($this->link, "SELECT description FROM
+		$result = db_query( "SELECT description FROM
 			ttrss_filter_actions WHERE id = " .(int)$action["action_id"]);
 
 		$title = __(db_fetch_result($result, 0, "description"));
@@ -463,13 +463,13 @@ class Pref_Filters extends Handler_Protected {
 
 #		print_r($_REQUEST);
 
-		$filter_id = db_escape_string($this->link, $_REQUEST["id"]);
-		$enabled = checkbox_to_sql_bool(db_escape_string($this->link, $_REQUEST["enabled"]));
-		$match_any_rule = checkbox_to_sql_bool(db_escape_string($this->link, $_REQUEST["match_any_rule"]));
-		$inverse = checkbox_to_sql_bool(db_escape_string($this->link, $_REQUEST["inverse"]));
-		$title = db_escape_string($this->link, $_REQUEST["title"]);
+		$filter_id = db_escape_string( $_REQUEST["id"]);
+		$enabled = checkbox_to_sql_bool(db_escape_string( $_REQUEST["enabled"]));
+		$match_any_rule = checkbox_to_sql_bool(db_escape_string( $_REQUEST["match_any_rule"]));
+		$inverse = checkbox_to_sql_bool(db_escape_string( $_REQUEST["inverse"]));
+		$title = db_escape_string( $_REQUEST["title"]);
 
-		$result = db_query($this->link, "UPDATE ttrss_filters2 SET enabled = $enabled,
+		$result = db_query( "UPDATE ttrss_filters2 SET enabled = $enabled,
 			match_any_rule = $match_any_rule,
 			inverse = $inverse,
 			title = '$title'
@@ -482,17 +482,17 @@ class Pref_Filters extends Handler_Protected {
 
 	function remove() {
 
-		$ids = explode(",", db_escape_string($this->link, $_REQUEST["ids"]));
+		$ids = explode(",", db_escape_string( $_REQUEST["ids"]));
 
 		foreach ($ids as $id) {
-			db_query($this->link, "DELETE FROM ttrss_filters2 WHERE id = '$id' AND owner_uid = ". $_SESSION["uid"]);
+			db_query( "DELETE FROM ttrss_filters2 WHERE id = '$id' AND owner_uid = ". $_SESSION["uid"]);
 		}
 	}
 
 	private function saveRulesAndActions($filter_id) {
 
-		db_query($this->link, "DELETE FROM ttrss_filters2_rules WHERE filter_id = '$filter_id'");
-		db_query($this->link, "DELETE FROM ttrss_filters2_actions WHERE filter_id = '$filter_id'");
+		db_query( "DELETE FROM ttrss_filters2_rules WHERE filter_id = '$filter_id'");
+		db_query( "DELETE FROM ttrss_filters2_actions WHERE filter_id = '$filter_id'");
 
 		if ($filter_id) {
 			/* create rules */
@@ -521,11 +521,11 @@ class Pref_Filters extends Handler_Protected {
 			foreach ($rules as $rule) {
 				if ($rule) {
 
-					$reg_exp = strip_tags(db_escape_string($this->link, trim($rule["reg_exp"])));
+					$reg_exp = strip_tags(db_escape_string( trim($rule["reg_exp"])));
 					$inverse = isset($rule["inverse"]) ? "true" : "false";
 
-					$filter_type = (int) db_escape_string($this->link, trim($rule["filter_type"]));
-					$feed_id = db_escape_string($this->link, trim($rule["feed_id"]));
+					$filter_type = (int) db_escape_string( trim($rule["filter_type"]));
+					$feed_id = db_escape_string( trim($rule["feed_id"]));
 
 					if (strpos($feed_id, "CAT:") === 0) {
 
@@ -546,16 +546,16 @@ class Pref_Filters extends Handler_Protected {
 						(filter_id, reg_exp,filter_type,feed_id,cat_id,cat_filter,inverse) VALUES
 						('$filter_id', '$reg_exp', '$filter_type', $feed_id, $cat_id, $cat_filter, $inverse)";
 
-					db_query($this->link, $query);
+					db_query( $query);
 				}
 			}
 
 			foreach ($actions as $action) {
 				if ($action) {
 
-					$action_id = (int) db_escape_string($this->link, $action["action_id"]);
-					$action_param = db_escape_string($this->link, $action["action_param"]);
-					$action_param_label = db_escape_string($this->link, $action["action_param_label"]);
+					$action_id = (int) db_escape_string( $action["action_id"]);
+					$action_param = db_escape_string( $action["action_param"]);
+					$action_param_label = db_escape_string( $action["action_param_label"]);
 
 					if ($action_id == 7) {
 						$action_param = $action_param_label;
@@ -569,7 +569,7 @@ class Pref_Filters extends Handler_Protected {
 						(filter_id, action_id, action_param) VALUES
 						('$filter_id', '$action_id', '$action_param')";
 
-					db_query($this->link, $query);
+					db_query( $query);
 				}
 			}
 		}
@@ -586,35 +586,35 @@ class Pref_Filters extends Handler_Protected {
 
 		$enabled = checkbox_to_sql_bool($_REQUEST["enabled"]);
 		$match_any_rule = checkbox_to_sql_bool($_REQUEST["match_any_rule"]);
-		$title = db_escape_string($this->link, $_REQUEST["title"]);
+		$title = db_escape_string( $_REQUEST["title"]);
 
-		db_query($this->link, "BEGIN");
+		db_query( "BEGIN");
 
 		/* create base filter */
 
-		$result = db_query($this->link, "INSERT INTO ttrss_filters2
+		$result = db_query( "INSERT INTO ttrss_filters2
 			(owner_uid, match_any_rule, enabled, title) VALUES
 			(".$_SESSION["uid"].",$match_any_rule,$enabled, '$title')");
 
-		$result = db_query($this->link, "SELECT MAX(id) AS id FROM ttrss_filters2
+		$result = db_query( "SELECT MAX(id) AS id FROM ttrss_filters2
 			WHERE owner_uid = ".$_SESSION["uid"]);
 
 		$filter_id = db_fetch_result($result, 0, "id");
 
 		$this->saveRulesAndActions($filter_id);
 
-		db_query($this->link, "COMMIT");
+		db_query( "COMMIT");
 	}
 
 	function index() {
 
-		$sort = db_escape_string($this->link, $_REQUEST["sort"]);
+		$sort = db_escape_string( $_REQUEST["sort"]);
 
 		if (!$sort || $sort == "undefined") {
 			$sort = "reg_exp";
 		}
 
-		$filter_search = db_escape_string($this->link, $_REQUEST["search"]);
+		$filter_search = db_escape_string( $_REQUEST["search"]);
 
 		if (array_key_exists("search", $_REQUEST)) {
 			$_SESSION["prefs_filter_search"] = $filter_search;
@@ -626,7 +626,7 @@ class Pref_Filters extends Handler_Protected {
 		print "<div id=\"pref-filter-header\" dojoType=\"dijit.layout.ContentPane\" region=\"top\">";
 		print "<div id=\"pref-filter-toolbar\" dojoType=\"dijit.Toolbar\">";
 
-		$filter_search = db_escape_string($this->link, $_REQUEST["search"]);
+		$filter_search = db_escape_string( $_REQUEST["search"]);
 
 		if (array_key_exists("search", $_REQUEST)) {
 			$_SESSION["prefs_filter_search"] = $filter_search;
@@ -832,7 +832,7 @@ class Pref_Filters extends Handler_Protected {
 
 		print "<form name='filter_new_rule_form' id='filter_new_rule_form'>";
 
-		$result = db_query($this->link, "SELECT id,description
+		$result = db_query( "SELECT id,description
 			FROM ttrss_filter_types WHERE id != 5 ORDER BY description");
 
 		$filter_types = array();
@@ -864,7 +864,7 @@ class Pref_Filters extends Handler_Protected {
 		print __("in") . " ";
 
 		print "<span id='filterDlg_feeds'>";
-		print_feed_select($this->link, "feed_id",
+		print_feed_select( "feed_id",
 			$cat_filter ? "CAT:$feed_id" : $feed_id,
 			'dojoType="dijit.form.FilteringSelect"');
 		print "</span>";
@@ -888,7 +888,7 @@ class Pref_Filters extends Handler_Protected {
 		$action = json_decode($_REQUEST["action"], true);
 
 		if ($action) {
-			$action_param = db_escape_string($this->link, $action["action_param"]);
+			$action_param = db_escape_string( $action["action_param"]);
 			$action_id = (int)$action["action_id"];
 		} else {
 			$action_param = "";
@@ -904,7 +904,7 @@ class Pref_Filters extends Handler_Protected {
 		print "<select name=\"action_id\" dojoType=\"dijit.form.Select\"
 			onchange=\"filterDlgCheckAction(this)\">";
 
-		$result = db_query($this->link, "SELECT id,description FROM ttrss_filter_actions
+		$result = db_query( "SELECT id,description FROM ttrss_filter_actions
 			ORDER BY name");
 
 		while ($line = db_fetch_assoc($result)) {
@@ -928,7 +928,7 @@ class Pref_Filters extends Handler_Protected {
 			id=\"filterDlg_actionParam\" style=\"$param_hidden\"
 			name=\"action_param\" value=\"$action_param\">";
 
-		print_label_select($this->link, "action_param_label", $action_param,
+		print_label_select( "action_param_label", $action_param,
 			"id=\"filterDlg_actionParamLabel\" style=\"$label_param_hidden\"
 			dojoType=\"dijit.form.Select\"");
 
@@ -953,7 +953,7 @@ class Pref_Filters extends Handler_Protected {
 
 	private function getFilterName($id) {
 
-		$result = db_query($this->link,
+		$result = db_query(
 			"SELECT title,COUNT(DISTINCT r.id) AS num_rules,COUNT(DISTINCT a.id) AS num_actions
 				FROM ttrss_filters2 AS f LEFT JOIN ttrss_filters2_rules AS r
 					ON (r.filter_id = f.id)
@@ -968,7 +968,7 @@ class Pref_Filters extends Handler_Protected {
 
 		$title = sprintf(_ngettext("%s (%d rule)", "%s (%d rules)", $num_rules), $title, $num_rules);
 
-		$result = db_query($this->link,
+		$result = db_query(
 			"SELECT * FROM ttrss_filters2_actions WHERE filter_id = '$id' ORDER BY id LIMIT 1");
 
 		$actions = "";
@@ -987,22 +987,22 @@ class Pref_Filters extends Handler_Protected {
 	}
 
 	function join() {
-		$ids = explode(",", db_escape_string($this->link, $_REQUEST["ids"]));
+		$ids = explode(",", db_escape_string( $_REQUEST["ids"]));
 
 		if (count($ids) > 1) {
 			$base_id = array_shift($ids);
 			$ids_str = join(",", $ids);
 
-			db_query($this->link, "BEGIN");
-			db_query($this->link, "UPDATE ttrss_filters2_rules
+			db_query( "BEGIN");
+			db_query( "UPDATE ttrss_filters2_rules
 				SET filter_id = '$base_id' WHERE filter_id IN ($ids_str)");
-			db_query($this->link, "UPDATE ttrss_filters2_actions
+			db_query( "UPDATE ttrss_filters2_actions
 				SET filter_id = '$base_id' WHERE filter_id IN ($ids_str)");
 
-			db_query($this->link, "DELETE FROM ttrss_filters2 WHERE id IN ($ids_str)");
-			db_query($this->link, "UPDATE ttrss_filters2 SET match_any_rule = true WHERE id = '$base_id'");
+			db_query( "DELETE FROM ttrss_filters2 WHERE id IN ($ids_str)");
+			db_query( "UPDATE ttrss_filters2 SET match_any_rule = true WHERE id = '$base_id'");
 
-			db_query($this->link, "COMMIT");
+			db_query( "COMMIT");
 
 			$this->optimizeFilter($base_id);
 
@@ -1010,8 +1010,8 @@ class Pref_Filters extends Handler_Protected {
 	}
 
 	private function optimizeFilter($id) {
-		db_query($this->link, "BEGIN");
-		$result = db_query($this->link, "SELECT * FROM ttrss_filters2_actions
+		db_query( "BEGIN");
+		$result = db_query( "SELECT * FROM ttrss_filters2_actions
 			WHERE filter_id = '$id'");
 
 		$tmp = array();
@@ -1030,11 +1030,11 @@ class Pref_Filters extends Handler_Protected {
 
 		if (count($dupe_ids) > 0) {
 			$ids_str = join(",", $dupe_ids);
-			db_query($this->link, "DELETE FROM ttrss_filters2_actions
+			db_query( "DELETE FROM ttrss_filters2_actions
 				WHERE id IN ($ids_str)");
 		}
 
-		$result = db_query($this->link, "SELECT * FROM ttrss_filters2_rules
+		$result = db_query( "SELECT * FROM ttrss_filters2_rules
 			WHERE filter_id = '$id'");
 
 		$tmp = array();
@@ -1053,11 +1053,11 @@ class Pref_Filters extends Handler_Protected {
 
 		if (count($dupe_ids) > 0) {
 			$ids_str = join(",", $dupe_ids);
-			db_query($this->link, "DELETE FROM ttrss_filters2_rules
+			db_query( "DELETE FROM ttrss_filters2_rules
 				WHERE id IN ($ids_str)");
 		}
 
-		db_query($this->link, "COMMIT");
+		db_query( "COMMIT");
 	}
 }
 ?>
diff --git a/classes/pref/labels.php b/classes/pref/labels.php
index 15fa7b20b..e0b118e81 100644
--- a/classes/pref/labels.php
+++ b/classes/pref/labels.php
@@ -8,9 +8,9 @@ class Pref_Labels extends Handler_Protected {
 	}
 
 	function edit() {
-		$label_id = db_escape_string($this->link, $_REQUEST['id']);
+		$label_id = db_escape_string( $_REQUEST['id']);
 
-		$result = db_query($this->link, "SELECT * FROM ttrss_labels2 WHERE
+		$result = db_query( "SELECT * FROM ttrss_labels2 WHERE
 			id = '$label_id' AND owner_uid = " . $_SESSION["uid"]);
 
 		$line = db_fetch_assoc($result);
@@ -90,7 +90,7 @@ class Pref_Labels extends Handler_Protected {
 		$root['name'] = __('Labels');
 		$root['items'] = array();
 
-		$result = db_query($this->link, "SELECT *
+		$result = db_query( "SELECT *
 			FROM ttrss_labels2
 			WHERE owner_uid = ".$_SESSION["uid"]."
 			ORDER BY caption");
@@ -118,29 +118,29 @@ class Pref_Labels extends Handler_Protected {
 	}
 
 	function colorset() {
-		$kind = db_escape_string($this->link, $_REQUEST["kind"]);
-		$ids = explode(',', db_escape_string($this->link, $_REQUEST["ids"]));
-		$color = db_escape_string($this->link, $_REQUEST["color"]);
-		$fg = db_escape_string($this->link, $_REQUEST["fg"]);
-		$bg = db_escape_string($this->link, $_REQUEST["bg"]);
+		$kind = db_escape_string( $_REQUEST["kind"]);
+		$ids = explode(',', db_escape_string( $_REQUEST["ids"]));
+		$color = db_escape_string( $_REQUEST["color"]);
+		$fg = db_escape_string( $_REQUEST["fg"]);
+		$bg = db_escape_string( $_REQUEST["bg"]);
 
 		foreach ($ids as $id) {
 
 			if ($kind == "fg" || $kind == "bg") {
-				db_query($this->link, "UPDATE ttrss_labels2 SET
+				db_query( "UPDATE ttrss_labels2 SET
 					${kind}_color = '$color' WHERE id = '$id'
 					AND owner_uid = " . $_SESSION["uid"]);
 			} else {
-				db_query($this->link, "UPDATE ttrss_labels2 SET
+				db_query( "UPDATE ttrss_labels2 SET
 					fg_color = '$fg', bg_color = '$bg' WHERE id = '$id'
 					AND owner_uid = " . $_SESSION["uid"]);
 			}
 
-			$caption = db_escape_string($this->link, label_find_caption($this->link, $id, $_SESSION["uid"]));
+			$caption = db_escape_string( label_find_caption($id, $_SESSION["uid"]));
 
 			/* Remove cached data */
 
-			db_query($this->link, "UPDATE ttrss_user_entries SET label_cache = ''
+			db_query( "UPDATE ttrss_user_entries SET label_cache = ''
 				WHERE label_cache LIKE '%$caption%' AND owner_uid = " . $_SESSION["uid"]);
 
 		}
@@ -149,18 +149,18 @@ class Pref_Labels extends Handler_Protected {
 	}
 
 	function colorreset() {
-		$ids = explode(',', db_escape_string($this->link, $_REQUEST["ids"]));
+		$ids = explode(',', db_escape_string( $_REQUEST["ids"]));
 
 		foreach ($ids as $id) {
-			db_query($this->link, "UPDATE ttrss_labels2 SET
+			db_query( "UPDATE ttrss_labels2 SET
 				fg_color = '', bg_color = '' WHERE id = '$id'
 				AND owner_uid = " . $_SESSION["uid"]);
 
-			$caption = db_escape_string($this->link, label_find_caption($this->link, $id, $_SESSION["uid"]));
+			$caption = db_escape_string( label_find_caption($id, $_SESSION["uid"]));
 
 			/* Remove cached data */
 
-			db_query($this->link, "UPDATE ttrss_user_entries SET label_cache = ''
+			db_query( "UPDATE ttrss_user_entries SET label_cache = ''
 				WHERE label_cache LIKE '%$caption%' AND owner_uid = " . $_SESSION["uid"]);
 		}
 
@@ -168,31 +168,31 @@ class Pref_Labels extends Handler_Protected {
 
 	function save() {
 
-		$id = db_escape_string($this->link, $_REQUEST["id"]);
-		$caption = db_escape_string($this->link, trim($_REQUEST["caption"]));
+		$id = db_escape_string( $_REQUEST["id"]);
+		$caption = db_escape_string( trim($_REQUEST["caption"]));
 
-		db_query($this->link, "BEGIN");
+		db_query( "BEGIN");
 
-		$result = db_query($this->link, "SELECT caption FROM ttrss_labels2
+		$result = db_query( "SELECT caption FROM ttrss_labels2
 			WHERE id = '$id' AND owner_uid = ". $_SESSION["uid"]);
 
 		if (db_num_rows($result) != 0) {
 			$old_caption = db_fetch_result($result, 0, "caption");
 
-			$result = db_query($this->link, "SELECT id FROM ttrss_labels2
+			$result = db_query( "SELECT id FROM ttrss_labels2
 				WHERE caption = '$caption' AND owner_uid = ". $_SESSION["uid"]);
 
 			if (db_num_rows($result) == 0) {
 				if ($caption) {
-					$result = db_query($this->link, "UPDATE ttrss_labels2 SET
+					$result = db_query( "UPDATE ttrss_labels2 SET
 						caption = '$caption' WHERE id = '$id' AND
 						owner_uid = " . $_SESSION["uid"]);
 
 					/* Update filters that reference label being renamed */
 
-					$old_caption = db_escape_string($this->link, $old_caption);
+					$old_caption = db_escape_string( $old_caption);
 
-					db_query($this->link, "UPDATE ttrss_filters2_actions SET
+					db_query( "UPDATE ttrss_filters2_actions SET
 						action_param = '$caption' WHERE action_param = '$old_caption'
 						AND action_id = 7
 						AND filter_id IN (SELECT id FROM ttrss_filters2 WHERE owner_uid = ".$_SESSION["uid"].")");
@@ -206,28 +206,28 @@ class Pref_Labels extends Handler_Protected {
 			}
 		}
 
-		db_query($this->link, "COMMIT");
+		db_query( "COMMIT");
 
 		return;
 	}
 
 	function remove() {
 
-		$ids = explode(",", db_escape_string($this->link, $_REQUEST["ids"]));
+		$ids = explode(",", db_escape_string( $_REQUEST["ids"]));
 
 		foreach ($ids as $id) {
-			label_remove($this->link, $id, $_SESSION["uid"]);
+			label_remove( $id, $_SESSION["uid"]);
 		}
 
 	}
 
 	function add() {
-		$caption = db_escape_string($this->link, $_REQUEST["caption"]);
-		$output = db_escape_string($this->link, $_REQUEST["output"]);
+		$caption = db_escape_string( $_REQUEST["caption"]);
+		$output = db_escape_string( $_REQUEST["output"]);
 
 		if ($caption) {
 
-			if (label_create($this->link, $caption)) {
+			if (label_create( $caption)) {
 				if (!$output) {
 					print T_sprintf("Created label <b>%s</b>", htmlspecialchars($caption));
 				}
@@ -238,7 +238,7 @@ class Pref_Labels extends Handler_Protected {
 
 				print "<rpc-reply><payload>";
 
-				print_label_select($this->link, "select_label",
+				print_label_select( "select_label",
 					$caption, "");
 
 				print "</payload></rpc-reply>";
@@ -250,13 +250,13 @@ class Pref_Labels extends Handler_Protected {
 
 	function index() {
 
-		$sort = db_escape_string($this->link, $_REQUEST["sort"]);
+		$sort = db_escape_string( $_REQUEST["sort"]);
 
 		if (!$sort || $sort == "undefined") {
 			$sort = "caption";
 		}
 
-		$label_search = db_escape_string($this->link, $_REQUEST["search"]);
+		$label_search = db_escape_string( $_REQUEST["search"]);
 
 		if (array_key_exists("search", $_REQUEST)) {
 			$_SESSION["prefs_label_search"] = $label_search;
diff --git a/classes/pref/prefs.php b/classes/pref/prefs.php
index 2f316b48b..faab69235 100644
--- a/classes/pref/prefs.php
+++ b/classes/pref/prefs.php
@@ -103,13 +103,13 @@ class Pref_Prefs extends Handler_Protected {
 
 		foreach (array_keys($_POST) as $pref_name) {
 
-			$pref_name = db_escape_string($this->link, $pref_name);
-			$value = db_escape_string($this->link, $_POST[$pref_name]);
+			$pref_name = db_escape_string( $pref_name);
+			$value = db_escape_string( $_POST[$pref_name]);
 
 			if ($pref_name == 'DIGEST_PREFERRED_TIME') {
-				if (get_pref($this->link, 'DIGEST_PREFERRED_TIME') != $value) {
+				if (get_pref( 'DIGEST_PREFERRED_TIME') != $value) {
 
-					db_query($this->link, "UPDATE ttrss_users SET
+					db_query( "UPDATE ttrss_users SET
 						last_digest_sent = NULL WHERE id = " . $_SESSION['uid']);
 
 				}
@@ -124,7 +124,7 @@ class Pref_Prefs extends Handler_Protected {
 					$need_reload = true;
 				}
 			} else {
-				set_pref($this->link, $pref_name, $value);
+				set_pref( $pref_name, $value);
 			}
 
 		}
@@ -138,9 +138,9 @@ class Pref_Prefs extends Handler_Protected {
 
 	function getHelp() {
 
-		$pref_name = db_escape_string($this->link, $_REQUEST["pn"]);
+		$pref_name = db_escape_string( $_REQUEST["pn"]);
 
-		$result = db_query($this->link, "SELECT help_text FROM ttrss_prefs
+		$result = db_query( "SELECT help_text FROM ttrss_prefs
 			WHERE pref_name = '$pref_name'");
 
 		if (db_num_rows($result) > 0) {
@@ -153,12 +153,12 @@ class Pref_Prefs extends Handler_Protected {
 
 	function changeemail() {
 
-		$email = db_escape_string($this->link, $_POST["email"]);
-		$full_name = db_escape_string($this->link, $_POST["full_name"]);
+		$email = db_escape_string( $_POST["email"]);
+		$full_name = db_escape_string( $_POST["full_name"]);
 
 		$active_uid = $_SESSION["uid"];
 
-		db_query($this->link, "UPDATE ttrss_users SET email = '$email',
+		db_query( "UPDATE ttrss_users SET email = '$email',
 			full_name = '$full_name' WHERE id = '$active_uid'");
 
 		print __("Your personal data has been saved.");
@@ -176,10 +176,10 @@ class Pref_Prefs extends Handler_Protected {
 			$profile_qpart = "profile IS NULL";
 		}
 
-		db_query($this->link, "DELETE FROM ttrss_user_prefs
+		db_query( "DELETE FROM ttrss_user_prefs
 			WHERE $profile_qpart AND owner_uid = ".$_SESSION["uid"]);
 
-		initialize_user_prefs($this->link, $_SESSION["uid"], $_SESSION["profile"]);
+		initialize_user_prefs( $_SESSION["uid"], $_SESSION["profile"]);
 
 		echo __("Your preferences are now set to default values.");
 	}
@@ -225,7 +225,7 @@ class Pref_Prefs extends Handler_Protected {
 
 		print "<h2>" . __("Personal data") . "</h2>";
 
-		$result = db_query($this->link, "SELECT email,full_name,otp_enabled,
+		$result = db_query( "SELECT email,full_name,otp_enabled,
 			access_level FROM ttrss_users
 			WHERE id = ".$_SESSION["uid"]);
 
@@ -270,7 +270,7 @@ class Pref_Prefs extends Handler_Protected {
 
 			print "<h2>" . __("Password") . "</h2>";
 
-			$result = db_query($this->link, "SELECT id FROM ttrss_users
+			$result = db_query( "SELECT id FROM ttrss_users
 				WHERE id = ".$_SESSION["uid"]." AND pwd_hash
 				= 'SHA1:5baa61e4c9b93f3f0682250b6cf8331b7ee68fd8'");
 
@@ -480,10 +480,10 @@ class Pref_Prefs extends Handler_Protected {
 		}
 
 		if ($_SESSION["profile"]) {
-			initialize_user_prefs($this->link, $_SESSION["uid"], $_SESSION["profile"]);
+			initialize_user_prefs( $_SESSION["uid"], $_SESSION["profile"]);
 			$profile_qpart = "profile = '" . $_SESSION["profile"] . "'";
 		} else {
-			initialize_user_prefs($this->link, $_SESSION["uid"]);
+			initialize_user_prefs( $_SESSION["uid"]);
 			$profile_qpart = "profile IS NULL";
 		}
 
@@ -494,7 +494,7 @@ class Pref_Prefs extends Handler_Protected {
 
 		$access_query = 'true';
 
-		$result = db_query($this->link, "SELECT DISTINCT
+		$result = db_query( "SELECT DISTINCT
 			ttrss_user_prefs.pref_name,value,type_name,
 			ttrss_prefs_sections.order_id,
 			def_value,section_id
@@ -767,9 +767,9 @@ class Pref_Prefs extends Handler_Protected {
 				<td width='10%'>".__('Author')."</td></tr>";
 
 		$system_enabled = array_map("trim", explode(",", PLUGINS));
-		$user_enabled = array_map("trim", explode(",", get_pref($this->link, "_ENABLED_PLUGINS")));
+		$user_enabled = array_map("trim", explode(",", get_pref( "_ENABLED_PLUGINS")));
 
-		$tmppluginhost = new PluginHost($this->link);
+		$tmppluginhost = new PluginHost();
 		$tmppluginhost->load_all($tmppluginhost::KIND_ALL, $_SESSION["uid"]);
 		$tmppluginhost->load_data(true);
 
@@ -897,7 +897,7 @@ class Pref_Prefs extends Handler_Protected {
 		require_once "lib/otphp/lib/totp.php";
 		require_once "lib/phpqrcode/phpqrcode.php";
 
-		$result = db_query($this->link, "SELECT login,salt,otp_enabled
+		$result = db_query( "SELECT login,salt,otp_enabled
 			FROM ttrss_users
 			WHERE id = ".$_SESSION["uid"]);
 
@@ -926,7 +926,7 @@ class Pref_Prefs extends Handler_Protected {
 
 		if ($authenticator->check_password($_SESSION["uid"], $password)) {
 
-			$result = db_query($this->link, "SELECT salt
+			$result = db_query( "SELECT salt
 				FROM ttrss_users
 				WHERE id = ".$_SESSION["uid"]);
 
@@ -938,7 +938,7 @@ class Pref_Prefs extends Handler_Protected {
 			$otp_check = $topt->now();
 
 			if ($otp == $otp_check) {
-				db_query($this->link, "UPDATE ttrss_users SET otp_enabled = true WHERE
+				db_query( "UPDATE ttrss_users SET otp_enabled = true WHERE
 					id = " . $_SESSION["uid"]);
 
 				print "OK";
@@ -952,14 +952,14 @@ class Pref_Prefs extends Handler_Protected {
 	}
 
 	function otpdisable() {
-		$password = db_escape_string($this->link, $_REQUEST["password"]);
+		$password = db_escape_string( $_REQUEST["password"]);
 
 		global $pluginhost;
 		$authenticator = $pluginhost->get_plugin($_SESSION["auth_module"]);
 
 		if ($authenticator->check_password($_SESSION["uid"], $password)) {
 
-			db_query($this->link, "UPDATE ttrss_users SET otp_enabled = false WHERE
+			db_query( "UPDATE ttrss_users SET otp_enabled = false WHERE
 				id = " . $_SESSION["uid"]);
 
 			print "OK";
@@ -975,18 +975,18 @@ class Pref_Prefs extends Handler_Protected {
 		else
 			$plugins = "";
 
-		set_pref($this->link, "_ENABLED_PLUGINS", $plugins);
+		set_pref( "_ENABLED_PLUGINS", $plugins);
 	}
 
 	function clearplugindata() {
-		$name = db_escape_string($this->link, $_REQUEST["name"]);
+		$name = db_escape_string( $_REQUEST["name"]);
 
 		global $pluginhost;
 		$pluginhost->clear_data($pluginhost->get_plugin($name));
 	}
 
 	function customizeCSS() {
-		$value = get_pref($this->link, "USER_STYLESHEET");
+		$value = get_pref( "USER_STYLESHEET");
 
 		$value = str_replace("<br/>", "\n", $value);
 
@@ -1034,7 +1034,7 @@ class Pref_Prefs extends Handler_Protected {
 
 		print "</div>";
 
-		$result = db_query($this->link, "SELECT title,id FROM ttrss_settings_profiles
+		$result = db_query( "SELECT title,id FROM ttrss_settings_profiles
 			WHERE owner_uid = ".$_SESSION["uid"]." ORDER BY title");
 
 		print "<div class=\"prefProfileHolder\">";
diff --git a/classes/pref/system.php b/classes/pref/system.php
index 2957b7b96..0282b2d73 100644
--- a/classes/pref/system.php
+++ b/classes/pref/system.php
@@ -2,10 +2,6 @@
 
 class Pref_System extends Handler_Protected {
 
-	function __construct($link, $args) {
-		parent::__construct($link, $args);
-	}
-
 	function before($method) {
 		if (parent::before($method)) {
 			if ($_SESSION["access_level"] < 10) {
@@ -28,7 +24,7 @@ class Pref_System extends Handler_Protected {
 		print "<div dojoType=\"dijit.layout.AccordionContainer\" region=\"center\">";
 		print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('Error Log')."\">";
 
-		$result = db_query($this->link, "SELECT errno, errstr, filename, lineno,
+		$result = db_query( "SELECT errno, errstr, filename, lineno,
 			created_at, login FROM ttrss_error_log
 			LEFT JOIN ttrss_users ON (owner_uid = ttrss_users.id)
 			ORDER BY ttrss_error_log.id DESC
@@ -57,7 +53,7 @@ class Pref_System extends Handler_Protected {
 			print "<td class='login'>" . $line["login"] . "</td>";
 
 			print "<td class='timestamp'>" .
-				make_local_datetime($this->link,
+				make_local_datetime(
 				$line["created_at"], false) . "</td>";
 
 			print "</tr>";
diff --git a/classes/pref/users.php b/classes/pref/users.php
index bd2fff735..a9c3689fd 100644
--- a/classes/pref/users.php
+++ b/classes/pref/users.php
@@ -21,7 +21,7 @@ class Pref_Users extends Handler_Protected {
 
 			$uid = sprintf("%d", $_REQUEST["id"]);
 
-			$result = db_query($this->link, "SELECT login,
+			$result = db_query( "SELECT login,
 				".SUBSTRING_FOR_DATE."(last_login,1,16) AS last_login,
 				access_level,
 				(SELECT COUNT(int_id) FROM ttrss_user_entries
@@ -41,10 +41,10 @@ class Pref_Users extends Handler_Protected {
 
 			print "<table width='100%'>";
 
-			$last_login = make_local_datetime($this->link,
+			$last_login = make_local_datetime(
 				db_fetch_result($result, 0, "last_login"), true);
 
-			$created = make_local_datetime($this->link,
+			$created = make_local_datetime(
 				db_fetch_result($result, 0, "created"), true);
 
 			$access_level = db_fetch_result($result, 0, "access_level");
@@ -53,7 +53,7 @@ class Pref_Users extends Handler_Protected {
 			print "<tr><td>".__('Registered')."</td><td>$created</td></tr>";
 			print "<tr><td>".__('Last logged in')."</td><td>$last_login</td></tr>";
 
-			$result = db_query($this->link, "SELECT COUNT(id) as num_feeds FROM ttrss_feeds
+			$result = db_query( "SELECT COUNT(id) as num_feeds FROM ttrss_feeds
 				WHERE owner_uid = '$uid'");
 
 			$num_feeds = db_fetch_result($result, 0, "num_feeds");
@@ -64,7 +64,7 @@ class Pref_Users extends Handler_Protected {
 
 			print "<h1>".__('Subscribed feeds')."</h1>";
 
-			$result = db_query($this->link, "SELECT id,title,site_url FROM ttrss_feeds
+			$result = db_query( "SELECT id,title,site_url FROM ttrss_feeds
 				WHERE owner_uid = '$uid' ORDER BY title");
 
 			print "<ul class=\"userFeedList\">";
@@ -105,14 +105,14 @@ class Pref_Users extends Handler_Protected {
 		function edit() {
 			global $access_level_names;
 
-			$id = db_escape_string($this->link, $_REQUEST["id"]);
+			$id = db_escape_string( $_REQUEST["id"]);
 			print "<form id=\"user_edit_form\" onsubmit='return false'>";
 
 			print "<input type=\"hidden\" name=\"id\" value=\"$id\">";
 			print "<input type=\"hidden\" name=\"op\" value=\"pref-users\">";
 			print "<input type=\"hidden\" name=\"method\" value=\"editSave\">";
 
-			$result = db_query($this->link, "SELECT * FROM ttrss_users WHERE id = '$id'");
+			$result = db_query( "SELECT * FROM ttrss_users WHERE id = '$id'");
 
 			$login = db_fetch_result($result, 0, "login");
 			$access_level = db_fetch_result($result, 0, "access_level");
@@ -181,10 +181,10 @@ class Pref_Users extends Handler_Protected {
 		}
 
 		function editSave() {
-			$login = db_escape_string($this->link, trim($_REQUEST["login"]));
-			$uid = db_escape_string($this->link, $_REQUEST["id"]);
+			$login = db_escape_string( trim($_REQUEST["login"]));
+			$uid = db_escape_string( $_REQUEST["id"]);
 			$access_level = (int) $_REQUEST["access_level"];
-			$email = db_escape_string($this->link, trim($_REQUEST["email"]));
+			$email = db_escape_string( trim($_REQUEST["email"]));
 			$password = $_REQUEST["password"];
 
 			if ($password) {
@@ -195,42 +195,42 @@ class Pref_Users extends Handler_Protected {
 				$pass_query_part = "";
 			}
 
-			db_query($this->link, "UPDATE ttrss_users SET $pass_query_part login = '$login',
+			db_query( "UPDATE ttrss_users SET $pass_query_part login = '$login',
 				access_level = '$access_level', email = '$email', otp_enabled = false
 				WHERE id = '$uid'");
 
 		}
 
 		function remove() {
-			$ids = explode(",", db_escape_string($this->link, $_REQUEST["ids"]));
+			$ids = explode(",", db_escape_string( $_REQUEST["ids"]));
 
 			foreach ($ids as $id) {
 				if ($id != $_SESSION["uid"] && $id != 1) {
-					db_query($this->link, "DELETE FROM ttrss_tags WHERE owner_uid = '$id'");
-					db_query($this->link, "DELETE FROM ttrss_feeds WHERE owner_uid = '$id'");
-					db_query($this->link, "DELETE FROM ttrss_users WHERE id = '$id'");
+					db_query( "DELETE FROM ttrss_tags WHERE owner_uid = '$id'");
+					db_query( "DELETE FROM ttrss_feeds WHERE owner_uid = '$id'");
+					db_query( "DELETE FROM ttrss_users WHERE id = '$id'");
 				}
 			}
 		}
 
 		function add() {
 
-			$login = db_escape_string($this->link, trim($_REQUEST["login"]));
+			$login = db_escape_string( trim($_REQUEST["login"]));
 			$tmp_user_pwd = make_password(8);
 			$salt = substr(bin2hex(get_random_bytes(125)), 0, 250);
 			$pwd_hash = encrypt_password($tmp_user_pwd, $salt, true);
 
-			$result = db_query($this->link, "SELECT id FROM ttrss_users WHERE
+			$result = db_query( "SELECT id FROM ttrss_users WHERE
 				login = '$login'");
 
 			if (db_num_rows($result) == 0) {
 
-				db_query($this->link, "INSERT INTO ttrss_users
+				db_query( "INSERT INTO ttrss_users
 					(login,pwd_hash,access_level,last_login,created, salt)
 					VALUES ('$login', '$pwd_hash', 0, null, NOW(), '$salt')");
 
 
-				$result = db_query($this->link, "SELECT id FROM ttrss_users WHERE
+				$result = db_query( "SELECT id FROM ttrss_users WHERE
 					login = '$login' AND pwd_hash = '$pwd_hash'");
 
 				if (db_num_rows($result) == 1) {
@@ -240,7 +240,7 @@ class Pref_Users extends Handler_Protected {
 					print format_notice(T_sprintf("Added user <b>%s</b> with password <b>%s</b>",
 						$login, $tmp_user_pwd));
 
-					initialize_user($this->link, $new_uid);
+					initialize_user( $new_uid);
 
 				} else {
 
@@ -304,8 +304,8 @@ class Pref_Users extends Handler_Protected {
 		}
 
 		function resetPass() {
-			$uid = db_escape_string($this->link, $_REQUEST["id"]);
-			Pref_Users::resetUserPassword($this->link, $uid, true);
+			$uid = db_escape_string( $_REQUEST["id"]);
+			Pref_Users::resetUserPassword( $uid, true);
 		}
 
 		function index() {
@@ -317,7 +317,7 @@ class Pref_Users extends Handler_Protected {
 
 			print "<div id=\"pref-user-toolbar\" dojoType=\"dijit.Toolbar\">";
 
-			$user_search = db_escape_string($this->link, $_REQUEST["search"]);
+			$user_search = db_escape_string( $_REQUEST["search"]);
 
 			if (array_key_exists("search", $_REQUEST)) {
 				$_SESSION["prefs_user_search"] = $user_search;
@@ -332,7 +332,7 @@ class Pref_Users extends Handler_Protected {
 					__('Search')."</button>
 				</div>";
 
-			$sort = db_escape_string($this->link, $_REQUEST["sort"]);
+			$sort = db_escape_string( $_REQUEST["sort"]);
 
 			if (!$sort || $sort == "undefined") {
 				$sort = "login";
@@ -381,7 +381,7 @@ class Pref_Users extends Handler_Protected {
 				$user_search_query = "";
 			}
 
-			$result = db_query($this->link, "SELECT
+			$result = db_query( "SELECT
 					id,login,access_level,email,
 					".SUBSTRING_FOR_DATE."(last_login,1,16) as last_login,
 					".SUBSTRING_FOR_DATE."(created,1,16) as created
@@ -416,8 +416,8 @@ class Pref_Users extends Handler_Protected {
 
 				$line["login"] = htmlspecialchars($line["login"]);
 
-				$line["created"] = make_local_datetime($this->link, $line["created"], false);
-				$line["last_login"] = make_local_datetime($this->link, $line["last_login"], false);
+				$line["created"] = make_local_datetime( $line["created"], false);
+				$line["last_login"] = make_local_datetime( $line["last_login"], false);
 
 				print "<td align='center'><input onclick='toggleSelectRow2(this);'
 					dojoType=\"dijit.form.CheckBox\" type=\"checkbox\"