PHP INSERT

<?php
include "header.template.php";
?>
<!-- forminsert.php
-->
<form method="get" action="">
ID
<input name="IDPelajar" type="text"
class="form-control">
Nama pelajar
<input name="NamaPel" type="text"
class="form-control">
Alamat
<input name="Alamat" type="text"
class="form-control">
<input type="submit" value="Simpan"
class="btn btn-primary">
</form>
<hr>
<?php
include "connection.php";
//verify ada data tidak dalam form
if (isset($_GET['IDPelajar'])){
    //capture all data
    $id=$_GET['IDPelajar'];
    $nama=$_GET['NamaPel'];
    $alamat=$_GET['Alamat'];
//sql command to create new record
    $sql="INSERT INTO pelajar
    (IDPelajar, NamaPel, Alamat)
    VALUES
    ('$id','$nama','$alamat')";
    //run sql
    $rs = mysqli_query($db, $sql);
    if($rs==true){
        echo "Rekod jaya disimpan";
    }
}
?>

<?php
include "footer.template.php";
?>