hl - syntax highlight print_r analog

hl.php

<?php
/**
* hl - syntax highlight print_r analog
* @author Oleg Kravchenko <lex69@list.ru>
*/
static function hl($value, $return = false)
{
	// color_theme for hl
	ini_set('highlight.string', '#99CF50');
	ini_set('highlight.keyword', '#F8F8F8');
	ini_set('highlight.default', '#E28964');
	ini_set('highlight.comment', '#99CF50');
	$highlight_bg = '#222222';

	// styles & button
	$id = preg_replace("/\d/", '', md5(rand()));
	$output = '<style>#'.$id.'{background:'.($highlight_bg!=''?$highlight_bg:'transparent').'; padding:20px;}'
		.'#'.$id.'>code>span>span:first-child{display:none;}'
		.'.hidden{display:none;}code{word-wrap:break-word;}</style>'
		.'<button id="'.$id.'1">Show/Hide</button>';
	if ( is_array($value) || is_object($value) )
	{
		// quotes
		function add_slashes(&$var)
		{
			switch (true) {
				// object - search strings
				case is_object($var) || is_array($var):
						foreach ($var as &$v) 
							add_slashes($v);
					break;
				// adding quotes
				default:
						$var = "'".str_replace("'", "`", $var)."'";
					break;
			}
		}
		add_slashes($value);

		// convert to string
		$value_str = print_r($value, true);
		$d_c = ini_get('highlight.default');
		$k_c = ini_get('highlight.keyword');
		// output
		$output .= '<div id="'.$id.'">'.preg_replace("/\[(class|default)\]/",
			"[</span><span style='color:".$d_c
			.";'>$1</span><span style='color:".$k_c.";'>]",
			highlight_string('<?php '.$value_str, true)).'</div>';
	}
	else
		$output .= '<div id="'.$id.'">'.highlight_string($value, true).'</div>';

	// open/hide script
	$output .= '<script>function tgl(el){el.style.display = (el.style.display == "none")?"block":"none"}'
		.'document.getElementById("'.$id.'1").addEventListener("click",'
		.'function(){tgl(document.getElementById("'.$id.'"))});</script>';

	// return or view
	if ( $return == true )
		return $output;
	elseif ( $return == 'die' )
		die ($output);
	else
		echo $output;		
}