shell_exec - unix commands in PHP

[stryka]

Ok... here's the scenario...

I am using the fileuploadcenter hack and i want to create a custom task that will copy the uploaded file into another folder....

eg) cp filename /destination/path/


right now i have defined a new scheduled task that points to a PHP that does the following:

PHP Code:

$files = $vbulletin->db->query_read("
    SELECT *
    FROM " . TABLE_PREFIX . "ftpfolder
");

while ($file = $vbulletin->db->fetch_array($files))
{

    $file_name = $file[file_name];
    $options = "$file_name" . " /destinationpath/"; 

$command .="cp $options";
shell_exec($command);  //system call 


the syntax looks fine... but nothing happens...... any ideas