Initial go at PHPStan rule level 6.

1 files changed, 5 insertions, 1 deletions

diff --git a/classes/errors.php b/classes/errors.php
index 3599c2639..31be558cf 100644
--- a/classes/errors.php
+++ b/classes/errors.php
@@ -7,7 +7,11 @@ class Errors {
 	const E_SCHEMA_MISMATCH = "E_SCHEMA_MISMATCH";
 	const E_URL_SCHEME_MISMATCH = "E_URL_SCHEME_MISMATCH";
 
-	static function to_json(string $code, array $params = []) {
+	/**
+	 * @param Errors::E_* $code
+	 * @param array<string, string> $params
+	 */
+	static function to_json(string $code, array $params = []): string {
 		return json_encode(["error" => ["code" => $code, "params" => $params]]);
 	}
 }