From:             knivey at botops dot net
Operating system: Ubuntu 12.04LTS
PHP version:      5.5.0beta3
Package:          Scripting Engine problem
Bug Type:         Bug
Bug description:execution operator `` stealing surrounding arguments

Description:
------------
When used the execution operator ` as an argument passed to a class method,
you will end up with a seg fault or invalid args to shell_exec error

Test script:
---------------
<?PHP
class cat {
  public function show_output($prepend, $output = '') {echo $prepend .
$output;}
  public function show_out($output) {echo $output;}
}
$cat = new cat();
$cat->show_output('Files: ', trim(`ls`)); // this gives invalid args to
shell_exec
$cat->show_output('Files: ', `ls`); // this causes a segmentation fault
$cat->show_out(`ls`); // this causes a segmentation fault

function show_outputa($prepend, $output) {echo $prepend . $output;}
show_outputa('Files: ', `ls`); // this works as expected



-- 
Edit bug report at https://bugs.php.net/bug.php?id=64677&edit=1
-- 
Try a snapshot (PHP 5.4):   
https://bugs.php.net/fix.php?id=64677&r=trysnapshot54
Try a snapshot (PHP 5.3):   
https://bugs.php.net/fix.php?id=64677&r=trysnapshot53
Try a snapshot (trunk):     
https://bugs.php.net/fix.php?id=64677&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=64677&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=64677&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=64677&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=64677&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=64677&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=64677&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=64677&r=notwrong
Not enough info:            
https://bugs.php.net/fix.php?id=64677&r=notenoughinfo
Submitted twice:            
https://bugs.php.net/fix.php?id=64677&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=64677&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=64677&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=64677&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=64677&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=64677&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=64677&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=64677&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=64677&r=mysqlcfg

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