// Exemple :
    $text = "<script>console.log('salut')</script>";
    echo $text; // Execute le script !
    echo filter_var($text, FILTER_SANITIZE_FULL_SPECIAL_CHARS); // Pas interprèter

    $email = "jean(du22)@toto.fr";
    echo $email; // output : jean(du22)@toto.fr
    echo filter_var($email, FILTER_SANITIZE_EMAIL); // output : jeandu22@toto.fr

    $number = "a10.5";
    echo filter_var($number, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION | FILTER_FLAG_ALLOW_THOUSAND);

    $arr = [
        'email' => 'jean(a)@<gmail>.com',
        'text' => '<script>const a = 1</script>',
        'number' => 'aa12aaa'
    ];
    print_r(filter_var_array($arr, [
        'email' => FILTER_SANITIZE_EMAIL,
        'text' => [
            'filter' => FILTER_SANITIZE_FULL_SPECIAL_CHARS,
            'flags' =>  FILTER_FLAG_NO_ENCODE_QUOTES
        ],
        'number' => FILTER_SANITIZE_NUMBER_INT
    ]));


    $_POST = filter_input_array(INPUT_POST, [
        'firstname' => FILTER_SANITIZE_FULL_SPECIAL_CHARS,
        'email' => FILTER_SANITIZE_EMAIL,
        'date' => FILTER_SANITIZE_FULL_SPECIAL_CHARS
    ]);