#38000 [Opn]: preg_match fails if strlen >= 1630

ID: 38000 User updated by: dave at smartboy dot com Reported By: dave at smartboy dot com Status: Open Bug Type: PCRE related Operating System: Windows XP PHP Version: 5.1.4 New Comment: $str = str_repeat('a', 1000000); //works in PHP 5.1.2 Previous Comments: ------------------------------------------------------------------------ [2006-07-04 21:23:49] dave at smartboy dot com It turns out that no test file is needed $str = str_repeat('a', 1575); //works $str = str_repeat('a', 1576); //fails There are really two issues: - PCRE not working for "long" strings (although 1576 bytes is not really a "long" string). This greatly limits the usefulness of regexp pattern matching. - When PCRE fails the error message is VERY misleading. Surely an E_NOTICE should be issued by preg_match() if match has failed due to out of memory, etc.? "Could not open input file" is just plain wrong. ------------------------------------------------------------------------ [2006-07-04 14:40:01] nlopess@php.net please provide the zzz file. (either post a link to it or send it to my e-mail). ------------------------------------------------------------------------ [2006-07-04 00:46:02] dave at smartboy dot com Description: ------------ preg_match() with regexp to test for valid UTF-8 sequence - fails and causes the error message: 'Could not open input file: <name of script>.php' IF the subject string passed to preg_match() is longer than 1629 characters. (Or in this case the size of the file 'zzz' which contains ASCII) There was no such limitation in preg_match() in the previous version of PHP (5.1.2) Reproduce code: --------------- $str = file_get_contents('zzz'); echo "Loaded file...\n"; $result = preg_match('/^([\x00-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|' . '[\xe1-\xec][\x80-\xbf]{2}|\xed[\x80-\x9f][\x80-\xbf]|[\xee-\xef][\x80-\xbf]{2}|' . '\xf0[\x90-\xbf][\x80-\xbf]{2}|[\xf1-\xf3][\x80-\xbf]{3}|\xf4[\x80-\x8f][\x80-\xbf]{2})*$/S', $str) === 1; echo "Back from preg_match()\n"; var_export($result); echo "\n"; Expected result: ---------------- Loaded file... Back from preg_match() true Actual result: -------------- Loaded file... Could not open input file: u8.php ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=38000&edit=1