Bug #60903 [Opn->Nab]: preg_match + operator fails with string exceeding length 18

Edit report at https://bugs.php.net/bug.php?id=60903&edit=1 ID: 60903 Updated by: felipe@php.net Reported by: gohanman at gmail dot com Summary: preg_match + operator fails with string exceeding length 18 -Status: Open +Status: Not a bug Type: Bug -Package: Regexps related +Package: PCRE related Operating System: Ubuntu PHP Version: 5.3.9 Block user comment: N Private report: N New Comment: Are you really using 5.3.9 with the built-in PCRE library? Your test case works just fine here. If it returns false, you can check preg_last_error() and adjust the INI configuration accordingly. About crashing, it's known behavior from PCRE library, take a look at the PCRE documentation for more information. Previous Comments: ------------------------------------------------------------------------ [2012-01-27 15:50:53] gohanman at gmail dot com Description: ------------ I'm trying to validate email addresses via regular expression. My regular expression fails if the first domain portion is longer than 18 characters. Overall string length does not seem relevant. Decreasing the length of the user portion or TLD does not make a 19+ character domain portion work. Test script: --------------- function is_email($str){ if(preg_match("/^[_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,4})$/i", $str)) return True; return False; } var_dump(is_email("user@123456789012345678.com")); var_dump(is_email("user@1234567890123456789.com")); Expected result: ---------------- bool(true); bool(true); Actual result: -------------- bool(true); bool(false); ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=60903&edit=1