sv3tli0

<?php
$email = (string) filter_input( INPUT_GET, 'email', FILTER_SANITIZE_EMAIL);
$email = filter_var( $email, FILTER_VALIDATE_EMAIL);

$name = (string) filter_input( INPUT_GET, 'name', FILTER_SANITIZE_SPECIAL_CHARS);

if( $email) {
    $pdo = new PDO('mysql:host=127.0.0.1;dbname=database', 'username', 'password');
    $stm = $pdo->prepare("SELECT COUNT(*) FROM `subscribes` WHERE `email` = ? ;");
    $stm->execute([$email]);