replsetstepdown.php

<?php
try{
### Step 1 & 2
    $m = new Mongo('ec2-50-16-121-178.compute-1.amazonaws.com');
    $db = $m->admin;

### Step 3
    $res = $db->command(array('replSetGetStatus' => 1));
    print_r($res);

### Step 4
    $res = $db->command(array('replSetStepDown' => 120));
    print_r($res);

### Step 5
    $res = $db->command(array('replSetGetStatus' => 1));
    print_r($res);
}
catch(Exception $ex){
  print($ex->getMessage());
}