<?php
$sql = "SELECT `hallo` FROM `hallo` WHERE `hallo` LIKE `hallo`";
// Rote
$sql = str_replace("SELECT", "<font color='red'>SELECT</font>", $sql);
$sql = str_replace("FROM", "<font color='red'>FROM</font>", $sql);
$sql = str_replace("WHERE", "<font color='red'>WHERE</font>", $sql);
$sql = str_replace("INSERT", "<font color='red'>INSERT</font>", $sql);
$sql = str_replace("UPDATE", "<font color='red'>UPDATE</font>", $sql);
$sql = str_replace("INTO", "<font color='red'>INTO</font>", $sql);
$sql = str_replace("ALTER", "<font color='red'>ALTER</font>", $sql);
$sql = str_replace("TRUNCATE", "<font color='red'>TRUNCATE</font>", $sql);
$sql = str_replace("DROP", "<font color='red'>DROP</font>", $sql);
$sql = str_replace("IN", "<font color='red'>IN</font>", $sql);
// Orange
$sql = str_replace("LIKE", "<font color='orange'>LIKE</font>", $sql);
$sql = str_replace("OR", "<font color='orange'>OR</font>", $sql);
$sql = str_replace("AND", "<font color='orange'>AND</font>", $sql);
$sql = str_replace("&&", "<font color='orange'>&&</font>", $sql);
// Blau
$sql = str_replace("`", "<font color='blue'>`</font>", $sql);
$sql = str_replace(" ' ", "<font color='blue'>'</font>", $sql);
echo $sql;
?>