function parse_smilies($text, $do_html = false)
{
	$cache =& $this->cache_smilies($do_html);
	$this->local_smilies =& $cache;

	// replace smilies chunk by chunk
	$quoted = '';
	foreach ($cache AS $find => $replace)
	{
		$quoted .= preg_quote($find, '/');
		if ( strlen($quoted) > 1000 ) {
			$text = preg_replace_callback('/(?<!&amp|&quot|&lt|&gt|&copy|&#[0-9]{1}|&#[0-9]{2}|&#[0-9]{3}|&#[0-9]{4}|&#[0-9]{5})(' . $quoted . ')/s', array(&$this, 'replace_smilies'), $text);
			$quoted = '';
		}
	}
	if ( strlen($quoted) ) {
		$text = preg_replace_callback('/(?<!&amp|&quot|&lt|&gt|&copy|&#[0-9]{1}|&#[0-9]{2}|&#[0-9]{3}|&#[0-9]{4}|&#[0-9]{5})(' . $quoted . ')/s', array(&$this, 'replace_smilies'), $text);
	}

	return $text;
}