OverLord Shell

<?php require_once("db/conn.php");
include("sql_ing.php");
/*$company_name=$_POST['company_name'];
$contact_phone=$_POST['contact_phone'];
$contact_mob=$_POST['contact_mob'];
$contact_person=$_POST['contact_person'];
$contact_email=$_POST['contact_email'];
$contact_fax=$_POST['contact_fax'];
$contact_website=$_POST['contact_website'];
$contact_address=$_POST['contact_address'];
$short_description=$_POST['short_description'];*/
$company_name = filter_var(addslashes($_POST['company_name']), FILTER_SANITIZE_STRING); 
$contact_phone = filter_var(addslashes($_POST['contact_phone']), FILTER_SANITIZE_STRING); 
$contact_mob = filter_var(addslashes($_POST['contact_mob']), FILTER_SANITIZE_STRING); 
$contact_person = filter_var(addslashes($_POST['fname']), FILTER_SANITIZE_STRING); 
$contact_email = filter_var(addslashes($_POST['contact_person']), FILTER_SANITIZE_STRING); 
$contact_fax = filter_var(addslashes($_POST['contact_fax']), FILTER_SANITIZE_STRING); 
$contact_website = filter_var(addslashes($_POST['contact_website']), FILTER_SANITIZE_STRING); 
$contact_address = filter_var(addslashes($_POST['contact_address']), FILTER_SANITIZE_STRING); 
$short_description = filter_var(addslashes($_POST['short_description']), FILTER_SANITIZE_STRING); 



  
  $addq="INSERT INTO mc_venue (company_name,contact_phone,contact_mob,contact_person,contact_email,contact_fax,contact_website,contact_address,short_description) VALUES ('".no_injection(addslashes($company_name))."','".no_injection(addslashes($contact_phone))."','".no_injection(addslashes($contact_mob))."','".no_injection(addslashes($contact_person))."','".no_injection(addslashes($contact_email))."','".no_injection(addslashes($contact_fax))."','".no_injection(addslashes($contact_website))."','".no_injection(addslashes($contact_address))."','".no_injection(addslashes($short_description))."')";
  $addr=$connection->query($addq);  
   			

     if($addr){
  	  echo "successfully Sent...";
		} else{
   			 echo "ERROR: Could not able to execute $addr.";
				}
				
                  
   ?>