[Bug 565481] Re: PHP preg_match doesn't match matching string

[Vladimir Kolesnikov]

This is neither PHP nor PCRE bug — the default backtrack limit
(xontrolled by pcre.backtrack_limit configuration directive) used by PHP
is too low for this case.

That is,

$ php
<?php
    $res = preg_match("/^(?:[^\[\]{}']+|'[^']*')+:(?:[^\[\]{}']+|'[^']*')+$/", "a:bbbbbbbbbbbbb");
    echo $res, ' ', preg_last_error(), "\n";
?>

0 2

2 is PREG_BACKTRACK_LIMIT_ERROR.

-- 
PHP preg_match doesn't match matching string
https://bugs.launchpad.net/bugs/565481
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