Stuff

<?php	$folder = './avatars';    $extList = array();	$extList['gif'] = 'image/gif';	$img = null;if (substr($folder,-1) != '/') {	$folder = $folder.'/';}if (isset($_GET['img'])) {	$imageInfo = pathinfo($_GET['img']);	if (	    isset( $extList[ strtolower( $imageInfo['extension'] ) ] ) &&        file_exists( $folder.$imageInfo['basename'] )    ) {		$img = $folder.$imageInfo['basename'];	}} else {	$fileList = array();	$handle = opendir($folder);	while ( false !== ( $file = readdir($handle) ) ) {		$file_info = pathinfo($file);		if (		    isset( $extList[ strtolower( $file_info['extension'] ) ] )		) {			$fileList[] = $file;		}	}	closedir($handle);	if (count($fileList) > 0) {		$imageNumber = time() % count($fileList);		$img = $folder.$fileList[$imageNumber];	}}if ($img!=null) {	$imageInfo = pathinfo($img);	$contentType = 'Content-type: '.$extList[ $imageInfo['extension'] ];	header ($contentType);	readfile($img);} else {	if ( function_exists('imagecreate') ) {		header ("Content-type: image/gif");		$im = @imagecreate (150, 150)		    or die ("Cannot initialize new GD image stream");		$background_color = imagecolorallocate ($im, 255, 255, 255);		$text_color = imagecolorallocate ($im, 0,0,0);		imagestring ($im, 2, 5, 5,  "IMAGE ERROR", $text_color);		imagepng ($im);		imagedestroy($im);	}}?>