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Kode 

 	// Fil til at læse fra
	$file = './s.tpl';

	// Regex
	$regex = '((http|https|ftp)\\:\\/\\/([a-zA-Z0-9\\.\\-]+(\\:[a-zA-Z0-9\\.&%\\$\\-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|localhost|([a-zA-Z0-9\\-]+\\.)*[a-zA-Z0-9\\-]+\\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(\\:[0-9]+)*(\\/($|[a-zA-Z0-9\\.\\,\\?\\'\\\\\\+&%\\$#\\=~_\\-]+))*)';

	// tegn der splittes med, typisk linebreak
	$splitChr = "\\n";
	
	$list = explode($splitChr,file_get_contents($file));
	for($i=0,$len=sizeof($list);$i<$len;$i++) {
		if(preg_match('/'.$regex.'/',$str)) {
			$list[$i] = preg_replace($regex,'<a href="$0">$0</a>',$list[$i]);
		}
	}
	
	
	die(implode($splitChr,$list));