note 97813 added to function.preg-replace

preg_replace (and str_replace too) will crash php if you use ' ' (space) as replace value for a large number of matches. For example: $string = preg_replace('/( )+/', ' ', $string); $string = str_replace(' ', ' ', $string); will crash if $string contains many seperate matches of ' ' producing following Apache Error-Log message: [Mon May 10 09:23:58 2010] [notice] child pid 39251 exit signal Illegal instruction (4) where pid 39251 was the PHP-thread processing that request. $string = preg_replace('/( )+/', '', $string); $string = str_replace(' ', '', $string); or $string = preg_replace('/( )+/', '_', $string); $string = str_replace(' ', '_', $string); do all work fine. This seems to be a bug in the underlying PCRE implementation, and not in PHP itself. ---- Server IP: 85.214.154.209 Probable Submitter: 213.47.87.9 ---- Manual Page -- http://www.php.net/manual/en/function.preg-replace.php Edit -- https://master.php.net/note/edit/97813 Del: integrated -- https://master.php.net/note/delete/97813/integrated Del: useless -- https://master.php.net/note/delete/97813/useless Del: bad code -- https://master.php.net/note/delete/97813/bad+code Del: spam -- https://master.php.net/note/delete/97813/spam Del: non-english -- https://master.php.net/note/delete/97813/non-english Del: in docs -- https://master.php.net/note/delete/97813/in+docs Del: other reasons-- https://master.php.net/note/delete/97813 Reject -- https://master.php.net/note/reject/97813 Search -- https://master.php.net/manage/user-notes.php