smiley_callback.php

function smiley_callback($matches) {
	$src = FALSE;
	foreach(array('.gif','.png') as $extension) {
		if(file_exists(KU_ROOTDIR.KU_SMILEDIR.$matches[1].$extension))	 {
			$src = KU_WEBPATH.'/'.KU_SMILEDIR.$matches[1].$extension;
			break; 
		}
	}
	$return = ($src) ? '<img style="vertical-align: middle;" src="'.$src.'" />': ':'.$matches[1].':';
	return $return; 
}