#43994 [Fbk]: mb_ereg 'successfully' matching incorrectly

ID: 43994 Updated by: jmessa@php.net -Reported By: josmessa at uk dot ibm dot com +Reported By: jmessa@php.net Status: Feedback Bug Type: mbstring related Operating System: Windows XP SP2 PHP Version: 5.2CVS-2008-01-31 (snap) Assigned To: hirokawa New Comment: I've run the above example on the latest 5.2 and 5.3 snapshots and am getting error messages warning about empty patterns similar to that in ereg() which is great. Thanks for making the change! Previous Comments: ------------------------------------------------------------------------ [2008-02-16 11:46:16] hirokawa@php.net Please try using this CVS snapshot: http://snaps.php.net/php5.3-latest.tar.gz For Windows (zip): http://snaps.php.net/win32/php5.3-win32-latest.zip For Windows (installer): http://snaps.php.net/win32/php5.3-win32-installer-latest.msi ------------------------------------------------------------------------ [2008-01-31 17:06:05] nicholsr@php.net Assign to extension maintainer ------------------------------------------------------------------------ [2008-01-31 15:04:31] jmessa@php.net Description: ------------ When mb_ereg is passed certain data types as the $pattern argument it will return int(1), i.e. a successful match, when in fact it has not matched. This is shown by setting the $regs argument and looking at the returned array which only contains one element which is bool(false). Reproduce code: --------------- <?php $unset_var = 10; unset ($unset_var); $inputs = array(NULL, null, false, FALSE, "", '', @$undefined_var, @$unset_var); $iterator = 1; foreach($inputs as $input) { if(@is_array($mb_regs)){ $mb_regs = ''; } echo "\n-- Iteration $iterator --\n"; echo "Without \$regs arg:\n"; var_dump( mb_ereg($input, 'hello, world') ); echo "With \$regs arg:\n"; var_dump(mb_ereg($input, 'hello, world', $mb_regs)); var_dump($mb_regs); $iterator++; }; ?> Expected result: ---------------- http://pastebin.com/f5f5c20ff Actual result: -------------- http://pastebin.com/f3f966bd0 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=43994&edit=1