#37064 [Opn->Fbk]: mod_ext_filter causes a filtered php page to hang with calls to eval()

ID: 37064 Updated by: tony2001@php.net Reported By: jason at merchant dot to -Status: Open +Status: Feedback Bug Type: Apache2 related Operating System: Windows XP PHP Version: 5.1.2 New Comment: Please try using this CVS snapshot: http://snaps.php.net/php5.2-latest.tar.gz For Windows: http://snaps.php.net/win32/php5.2-win32-latest.zip Previous Comments: ------------------------------------------------------------------------ [2006-04-13 19:13:54] jason at merchant dot to The link you gave me for the win32 debug packs is broken on http://snaps.php.net/ It is giving php warnings for all the win32 packages. ------------------------------------------------------------------------ [2006-04-13 10:29:36] tony2001@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. ------------------------------------------------------------------------ [2006-04-13 03:51:37] jason at merchant dot to Description: ------------ I am using Apache2's mod_ext_filter to modify the output filtering of html and php pages. It works fine on html pages. On php pages with to many calls to eval(), the filter will cause it to hang until the script times out. Within the 30 second timeout my filter was only able to return the first line unmodified. Reproduce code: --------------- //******** httpd.conf directives *************/ ExtFilterDefine myfilter mode=output intype=text/html cmd="C:/php/php.exe C:/myfilter.php" SetOutputFilter myfilter ///////////////////////////////////////////////////// //*** C:/myfilter.php(The filter called by php.exe) **/ <?php $fp = fopen("php://stdin", "r"); while (!feof($fp)) { echo fgets($fp); } fclose($fp); ?> ///////////////////////////////////////////////////// //******** the php page that will be filtered *******/ // This script was copied from a previous bug report with a similar issue in php3 here: http://bugs.php.net/bug.php?id=3744 <?php $b = ""; for ($i = 1; $i < 10000; $i++) $b .= "b"; echo "b: $b\n"; for ($i = 1; $i < 10000; $i++) { echo "i: $i\n"; flush(); eval("\$a = '$b';"); } ?> ///////////////////////////////////////////////////// Expected result: ---------------- when run with the filter turned off I get the expected echoed information. Actual result: -------------- The script hangs until it reaches the maximum execution time. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=37064&edit=1