How to calculate folder size in php (recursively)

This article mainly introduces how PHP uses recursion to calculate the folder size. The code is very simple to use and is recommended to everyone here.

The method is very simple, I won’t go into too much nonsense here, just give you the code:

The code is as follows:

protected function dir_size($dir){
        $dh = opendir($dir);             //打开目录，返回一个目录流
        $size = 0;      //初始大小为0 
        while(false !== ($file = @readdir($dh))){     //循环读取目录下的文件
           if($file!='.' and $file!='..'){
            $path = $dir.'/'.$file;     //设置目录，用于含有子目录的情况
                if(is_dir($path)){
                $size += $this->dir_size($path);  //递归调用，计算目录大小
                }elseif(is_file($path)){
                    $size += filesize($path);   //计算文件大小
                }
            } 
        }   
        closedir($dh);             //关闭目录流
        return $size;               //返回大小
    }

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