koenpunt

<?php

function gfm($text){
	# Extract pre blocks
	$extractions = array();
	
	$text = preg_replace_callback('/<pre>.*?<\/pre>/s', function($matches) use (&$extractions){
		$match = $matches[0];
		$md5 = md5($match);
		$extractions[$md5] = $match;