/* 调用回调函数检测文件是否存在 */
$data = call_user_func($this->callback, $file);
if( $this->callback && $data ){
if ( file_exists('.'.$data['path']) ) {
$info[$key] = $data;
continue;
}elseif($this->removeTrash){
call_user_func($this->removeTrash,$data);//删除垃圾据
}
}这段代码是做什么的看不懂啊?