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<?php
declare(strict_types=1);
/**
* This file is part of phpDocumentor.
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @link http://phpdoc.org
*/
namespace phpDocumentor\Reflection;
use phpDocumentor\Reflection\Exception\PcreException;
use Webmozart\Assert\Assert;
use function preg_last_error;
use function preg_split as php_preg_split;
abstract class Utils
{
/**
* Wrapper function for phps preg_split
*
* This function is inspired by {@link https://github.com/thecodingmachine/safe/blob/master/generated/pcre.php}. But
* since this library is all about performance we decided to strip everything we don't need. Reducing the amount
* of files that have to be loaded, ect.
*
* @param string $pattern The pattern to search for, as a string.
* @param string $subject The input string.
* @param int $limit If specified, then only substrings up to limit are returned with the
* rest of the string being placed in the last substring. A limit of -1 or 0 means "no limit".
* @param int $flags flags can be any combination of the following flags (combined with the | bitwise operator):
* *PREG_SPLIT_NO_EMPTY*
* If this flag is set, only non-empty pieces will be returned by preg_split().
* *PREG_SPLIT_DELIM_CAPTURE*
* If this flag is set, parenthesized expression in the delimiter pattern will be captured
* and returned as well.
* *PREG_SPLIT_OFFSET_CAPTURE*
* If this flag is set, for every occurring match the appendant string offset will also be returned.
* Note that this changes the return value in an array where every element is an array consisting of the
* matched string at offset 0 and its string offset into subject at offset 1.
*
* @return string[] Returns an array containing substrings of subject
* split along boundaries matched by pattern
*
* @throws PcreException
*/
public static function pregSplit(string $pattern, string $subject, int $limit = -1, int $flags = 0): array
{
$parts = php_preg_split($pattern, $subject, $limit, $flags);
if ($parts === false) {
throw PcreException::createFromPhpError(preg_last_error());
}
Assert::allString($parts);
return $parts;
}
}
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