Query regarding PHP

["Varun Vijayvargiya" <varunvijayvargiya gmail com>]

I am trying to call a PAM code from within a PHP scipt and also
passing 2 parameters like this

$args=$uname." ".$upass;

$command="./pampgm.o ".escapeshellcmd($args);

passthru($command);

$uname and $upass are two variables that were entered into a HTML form

but the code is not executing correctly