HTML Syntax-Highlighter

function syntax_high($code, $in_com) {
		$code = str_replace('"', '"', $code);
		if (count(explode("<!--", $code)) > 1) {
			$code = ereg_replace('&lt;!--(.*)', '<span class="comment">&lt;!--\1', $code);
			$in_com = true;
		} elseif (count(explode("--&gt;", $code)) > 1) {
			$code = ereg_replace('(.*)--&gt;', '\1--&gt;</span>', $code);
			$in_com = false;
		} elseif ($in_com) {
			$code = ereg_replace('(.*)', '<span class="comment">\1</span>', $code);
		} else {
			$code = ereg_replace('([^ ]*)="([^"]*)"', '<span class="attr">\1</span>="<span class="attr_val">\2</span>"', $code);
			$code = ereg_replace('&lt;([^&]*)&gt;', '<span class="lt">&lt;</span><span class="tag">\1</span><span class="gt">&gt;</span>', $code);
			$code = ereg_replace('&lt;/([^&]*)&gt;', '<span class="lt">&lt;/</span><span class="tag">\1</span><span class="gt">&gt;</span>', $code);
		}
		return array($in_com, $code);
	}
	function echo_code($text) {
	$return = '';
	$return .=  '<pre>'."\n";
	$parts = explode("\n", $text);
 $max = (string)count($parts);
 $length = strlen($max);
 $sy_text = '';
 $in_com = false;
 $sy_text_array = array();
 foreach ($parts as $key=>$val) {
	$sy_text_array = syntax_high(htmlentities($val), $in_com);
	$in_com = $sy_text_array[0];
	$sy_text .= ' '.$sy_text_array[1]."\n";
 }
 $parts = explode("\n", $sy_text);
 $max = (string)count($parts);
 $length = strlen($max);
 foreach ($parts as $key=>$val) {
	$num = $length - strlen($key + 1);
	$return .=  '<span class="num">';
	for($i=0;$i<$num;$i++) {$return .=  '0';}
	$return .=  ($key + 1).'</span>';
	$return .=  $val."\n";
 }
	$return .=  '</pre>';
	return $return;
	}

pre span.lt, pre span.gt {
	color:#0000ff;
}
pre span.tag {
	color:#0000ff;
}
pre span.attr {
	color:#ff0000;
}
pre span.attr_val {
	color:#ff00ff;
}
pre span.comment {
	color:#00cc00;
}
pre span.num {
	color:#555555;
}