Bug #72043 [Fbk->Opn]: preg_match restart Apache (Not with PHP 7.0.x or 5.5.x)

Edit report at https://bugs.php.net/bug.php?id=72043&edit=1 ID: 72043 User updated by: dominique at ottello dot net Reported by: dominique at ottello dot net Summary: preg_match restart Apache (Not with PHP 7.0.x or 5.5.x) -Status: Feedback +Status: Open Type: Bug Package: PCRE related Operating System: Windows 7 64bit PHP Version: 5.6.20 Block user comment: N Private report: N New Comment: You have send me email with how to generate a backtrace. I just spent more than five hours trying to generate this report "backtrace" and it comes to no conclusive result. Apache is running as a service and, despite numerous attempts, I find it totally impossible to start it in debug mode (-X). Previous Comments: ------------------------------------------------------------------------ [2016-05-01 17:54:22] ab@php.net Thank you for this bug report. To properly diagnose the problem, we need a backtrace to see what is happening behind the scenes. To find out how to generate a backtrace, please read http://bugs.php.net/bugs-generating-backtrace.php for *NIX and http://bugs.php.net/bugs-generating-backtrace-win32.php for Win32 Once you have generated a backtrace, please submit it to this bug report and change the status back to "Open". Thank you for helping us make PHP better. ------------------------------------------------------------------------ [2016-04-29 09:13:09] dominique at ottello dot net PHP version 5.6.21 doesn't correct this problem. Apache crashes with all versions of PHP 5.6. and works fine with other versions like 5.5.45 or 7.0.0 to 7.0.6 ------------------------------------------------------------------------ [2016-04-18 08:15:12] dominique at ottello dot net The problem was detected with the 32-bit versions of Apache and PHP, but is exactly the same with 64-bit versions. ------------------------------------------------------------------------ [2016-04-17 12:28:42] dominique at ottello dot net Description: ------------ Execution of this code works fine with Apache 2.4.16 to 2.4.20 and PHP 5.3.29, 5.4.45, 5.5.30 or 7.0.5 but crash and restart Apache with PHP 5.6.15 to 5.6.20 AH00428: Parent: child process 5912 exited with status 255 -- Restarting. All things otherwise identical, the problem occurs only with PHP 5.6.15 to 5.6.20. I have not tested with versions prior to 5.6.15. Test script: --------------- $c_vhostConfFile = 'myfile.conf'; //myfile.conf is a copy of: //$c_vhostConfFile = 'j:/wamp/bin/apache/apache2.4.20/conf/extra/httpd-vhosts.conf'; $myVhostsContents = file_get_contents($c_vhostConfFile); // ServerName to find $server = "wampserver.aviatechno"; $p_value = preg_quote($server); $mask = "{ <VirtualHost # beginning of VirtualHost ((?!</VirtualHost>).)* # avoid premature end \n\s*ServerName\s+${p_value}\s*\n # Test server name .*? # we stop as soon as possible </VirtualHost>\s*\n # end of VirtualHost }isx"; if(preg_match($mask, $myVhostsContents, $VirtualHost_match) !== false) echo "<pre>".htmlspecialchars($VirtualHost_match[0])."</pre>\n"; else echo "<p>preg_match error</p>\n"; ?> Expected result: ---------------- The whole content of the VirtualHost definition that is: <VirtualHost *:80> DocumentRoot "G:/www/wampserver" ServerAdmin webmaster@ottello.net ServerAlias www.wampserser.aviatechno ServerName wampserver.aviatechno <Directory "G:/www/wampserver/"> Options +Indexes +Includes +FollowSymLinks +MultiViews AllowOverride all Require local </Directory> </VirtualHost> Actual result: -------------- Apache crash and restart. No error in php_error.log ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=72043&edit=1