I have a simple $_GET[] query var set for showing testing data when pulling down queries from the DB.
<
function var_view($var)
{
ini_set("highlight.keyword", "#a50000; font-weight: bolder");
ini_set("highlight.string", "#5825b6; font-weight: lighter; ");
ob_start();
highlight_string("");
$highlighted_output = ob_get_clean();
$highlighted_output = str_replace( ["<?php","?>"] , '', $highlighted_output );
echo $highlighted_output;
die();
}