function my_rename ( $dirname ){$ext_arr = array( 'jpeg' , 'jpg' , 'gif' );$dir = opendir( $dirname );$count = 1 ;while (( $file = readdir( $dir )) !== false ) {if ( is_file ( $dirname . '/' . $file )) {$info = pathinfo ( $dirname . '/' . $file );if ( in_array ( strtolower( $info [ 'extension' ]),$ext_arr )) {rename ( $dirname . '/' . $file , $dirname . '/' .str_pad ( $count$count ++ ;}} elseif ( is_dir ( $dirname . '/' . $file ) && $file != '.' && $file != '}closedir ( $dir );}