Mini Kabibi Habibi

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

if(isset($_POST['save_multiple_data']))
{   
     $username = $_POST['username'];
    $non_acad = $_POST['non_acad'];
   
   
    foreach($username as $index => $usernames)
    {   
        $s_username = $usernames;
        $s_non_acad = $non_acad[$index];
        
        // $s_otherfiled = $empid[$index];

        $query = "INSERT INTO non_acad (username,non_acad) VALUES ('$s_username','$s_non_acad')";
        $query_run = mysqli_query($con, $query);
    }

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