<?php


function filter_tags($string){
    return str_replace(array("<", ">"), array("&lt;", "&gt;"), $string);
}

$query = "INSERT INTO comments (name, email, quote, hinzugefuegt, ip_adress) VALUES ('" . filter_tags($_POST['vName']) . "', '" . filter_tags($_POST['eMail']) . "', '" . filter_tags($_POST['q17']) . "', NOW(), '" . $_SERVER['REMOTE_ADDR'] . "')";