Bug #15247 Updated: preg_match('/(.|\n)*/',$a,$b) crashes

ID: 15247 User updated by: beavergr@pilot.msu.edu Old Summary: preg_match('/(.|\n)*/',$a,$b) crashes Reported By: beavergr@pilot.msu.edu Old Status: Feedback Status: Open Bug Type: Reproducible crash Operating System: Win98 PHP Version: 4.0.6 New Comment: Sorry, here's a script that crashes. If you change "$i<127" to "$i<126" it no longer crashes. I hope this is useful! As a postscript, I tried upgrading to 4.1.1, and couldn't find any configuration that worked with Apache 1.3.20 or 1.3.22. Also, the web server that hosts us still uses 4.0.6 <?php $read = '&test(blah){'; for($i=0;$i<127;$i++) { $read .= md5('hoogie'); } preg_match("/(&test\([^\)]+\)[\n\r\t]*\{)((?:.|\n|\r|\t)*)/",$read,$test); var_dump($test); ?> Previous Comments: ------------------------------------------------------------------------ [2002-01-27 15:10:31] derick@php.net I think this is a limit of the preg functions, it would really help if you could supply a script that reproduces it, and stands on it's own. Derick ------------------------------------------------------------------------ [2002-01-27 15:08:02] sander@php.net Do you have any idea of the size of $a? 1MB? 10MB? 100MB? 1GB? 1TB??? :) Does it help if you leave out the third argument (currently $b)? Also, can you try 4.1.1? ------------------------------------------------------------------------ [2002-01-27 14:59:36] beavergr@pilot.msu.edu if the size of $a is very large, php crashes. I replaced (.|\n)* with the better [\w\W]* and it stopped crashing. I'm not positive what the size limit is, the script that produced the crash is quite large and complex. print_r(get_loaded_extensions()) produces Array ( [0] => standard [1] => bcmath [2] => Calendar [3] => com [4] => variant [5] => ftp [6] => mysql [7] => odbc [8] => pcre [9] => session [10] => xml [11] => wddx [12] => gd [13] => pdf [14] => pgsql [15] => zlib [16] => Zend Optimizer [17] => apache ) I'm using Apache 1.3.20 ------------------------------------------------------------------------ Edit this bug report at http://bugs.php.net/?id=15247&edit=1