invisio v2.0

<?php 
include('../../../config/main_function.php');
$secure = "cAh3DrJACzw4RbU";
$connection = connectDB($secure);

$sql_system = "SELECT * FROM tbl_system_setting WHERE setting_id = '1';";
$rs_system = mysqli_query($connection , $sql_system);
$row_system = mysqli_fetch_array($rs_system);

$secure_text = $row_system['secure_text'];

$member_id = mysqli_real_escape_string($connection, $_POST['member_id']);
$temp_member_id = explode(".", $member_id);
$member_id = bigsara_decode($temp_member_id[0], $temp_member_id[1]);

$arr = [];
$sql = "SELECT * FROM tbl_member WHERE member_id = '$member_id'";
$rs = mysqli_query($connection,$sql);
$row = mysqli_fetch_array($rs);
if($row['register_type'] != 0){
    $arr['status'] = 200;
    $arr['register_type'] = $row['register_type'];

if ($row['register_level'] == 'g9k1s') {
        $arr['register_level'] = "ทั่วไป";
        $arr['level'] = "g9k1s";

}else if ($row['register_level'] == 'x9fkq') {
        $arr['register_level'] = "สามัญ";
        $arr['level'] = "สามัญ";

}elseif ($row['register_level'] == 'kki22') {
        $arr['register_level'] = "วิสามัญ";
        $arr['level'] = "kki22";

}

}else{
    $arr['status'] = 500;
    $arr['register_type'] = 0;
}
echo json_encode($arr);
?>