Anti Bypass SQL Auth

<?php
/* Algoritma sederhana untuk mencegah adanya bypass authentication di form login */
# Refrensi tentang bypass sql login tanpa quotes https://eternalnoobs.com/sqli-without-quotes/
/* Coded by Ardzz */
$user = $_POST["user"]; // set param
$pass = $_POST["pass"]; // set param
if(in_array($user,[hex2bin("5c"),"|","#"]) or in_array($pass,[hex2bin("5c"),"|","#"])){
echo "Maaf karakter tidak diijinkan";
}else{
//echo "welcome";
/* proses login */
}
?>