Mini Kabibi Habibi

<?php
session_start();
$con = mysqli_connect("localhost","root","","personnel");

if(isset($_POST['save_multiple_data']))
{   
     $username = $_POST['username'];
    $start_date = $_POST['start_date'];
    $end_date = $_POST['end_date'];
    $designation = $_POST['designation'];
    $status = $_POST['status'];
    $salary = $_POST['salary'];
    $station = $_POST['station'];
    $branch = $_POST['branch'];
    $leaves = $_POST['leaves'];
    $separation_date = $_POST['separation_date'];
    $separation_cause = $_POST['separation_cause'];
    $remarks = $_POST['remarks'];

    foreach($username as $index => $usernames)
    {   
        $s_username = $usernames;
        $s_start_date = $start_date[$index];
        $s_end_date = $end_date[$index];
        $s_designation = $designation[$index];
         $s_status = $status[$index];
          $s_salary = $salary[$index];
          $s_station = $station[$index];
          $s_branch = $branch[$index];
         $s_leaves = $leaves[$index];
          $s_separation_date = $separation_date[$index];
          $s_separation_cause = $separation_cause[$index];
          $s_remarks = $remarks[$index];
        // $s_otherfiled = $empid[$index];

        $query = "INSERT INTO service_record (username,START_SERVICE,END_SERVICE,DESIGNATION,STATUS,SALARY,STATION,BRANCH,LEAVES,separation_date,separation_cause,remarks) VALUES ('$s_username','$s_start_date','$s_end_date','$s_designation','$s_status','$s_salary','$s_station','$s_branch','$s_leaves','$s_separation_date','$s_separation_cause','$s_remarks')";
        $query_run = mysqli_query($con, $query);
    }

    if($query_run)
    {
        $_SESSION['status'] = "Multiple Data Inserted Successfully";
        header("Location: manage_service_record.php");
        exit(0);
    }
    else
    {
        $_SESSION['status'] = "Data Not Inserted";
        header("Location: manage_service_record.php");
        exit(0);
    }
}
?>