problem in insert command

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PHP

hi I am new in php. I could not insert the data into mysql table. and there is no error prompt Below is my code. Pls help me.

<?php
include_once '../inc/header.php';
if (isset($_POST['submit']) && $_POST['submit']  != "" )
    {
        $name = $_POST["name"];
        $address = $_POST["address"];
        $tel = $_POST["tel"];
        $fax = $_POST["fax"];
        $email = $_POST["email"];
        $website = $_POST["website"];
        $type = $_POST["type"];    
        try 
            { 
                $sql="INSERT INTO bk_customer (id,name,address,tel,fax,email,type,website)
                      VALUES ('$name','$address','$tel','$fax','$email','$website','$type')";
                $result = mysqli_query($con,$sql) ; 
                
           
            exit();
            } 
        catch (Exception $ex) 
            {
               echo $e->getMessage() . "\n";
               file_put_contents('PDOErrors.txt', $e->getMessage(), FILE_APPEND);
               exit();            
            }
     }
mysqli_close($con);
?>