run PHP shell_exec function

[carstena]

I am trying to run the PHP function shell_exec.

On my local webserver the script works, but on the webserver it gives the error:
Warning: shell_exec() [function.shell-exec]: Unable to execute '7z a -tzip "backup.zip" "backup.txt"'

the script:
<?
$output = shell_exec("7z a -tzip \"backup.zip\" \"backup.txt\"");
echo "<pre>$output</pre>";
?>

i have Googled for it but i didn't found the answer, what could be wrong?

 

[shall]

I am trying to run the PHP function shell_exec. ... Warning: shell_exec() [function.shell-exec]: Unable to execute '7z a -tzip "backup.zip" "backup.txt"'

Sounds like 7z doesnt have the right NTFS permissions for the IUSR or IWAM account in question.

 

[carstena]

7zip has the right permissions (IUSR and IWAM account), but it still doesn't work...

 

[farole]

You have to change the permission for cmd.exe in folder c:\windows\system32.. add the permission to same user for this file