// GeSHi class - http://qbnz.com/highlighter
require_once('geshi/geshi.php');

// formats code from file $uri and highlights according to language $lang (using the GeSHi)
function codify($htmlid,$uri,$lang,$line_numbers=true,$show_uri=true) {
	$dir = "/sourcecode/";								// default dir
	$lines = file(ABSDIR.$dir.$uri);					// put lines of file into array
	$list = ($line_numbers)? 'ol' : 'ul';				// ordered or unordered list, whether or not you want line numbers
	$ret = "<pre><$list id=\"$htmlid\" class=\"code-list $lang\">";
	if (!empty($lines)) {
		foreach ($lines as $line) {
			$line = rtrim($line);							// get rid of whitespace at the end of each line
			$line = str_replace("\t","    ",$line);			// replace tabs with 4 spaces
			$geshi =& new GeSHi($line, $lang);				// create GeSHi code highlighting object
			$geshi->enable_classes();
			$line = $geshi->parse_code();					// apply GeSHi highlighting
			$line = preg_replace("@</?pre.*>@U","",$line);	// remove <pre>s created by GeSHi
			$ret .= "<li><span>$line</span></li>\n";
		}
		if ($show_uri) $ret .= "<li class=\"code-list-source\"><span>source file: <a href=\"$dir$uri\" title=\"$uri\">$uri</a></span></li>\n";
	} else $ret .= "<li class=\"error tc\">Cannot read contents of $uri</li>\n";
	$ret .= "</$list></pre>\n";
	return $ret;
}