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

[tony2001]

 ID:               37064
 Updated by:       [EMAIL PROTECTED]
 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:

Thank you for this bug report. To properly diagnose the problem, we
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Previous Comments:
------------------------------------------------------------------------

[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.


------------------------------------------------------------------------


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