PHP function to calculate directory file size

This article mainly introduces the function of calculating directory file size in PHP. Interested friends can refer to it. I hope it will be helpful to everyone.

The code is as follows:

This function can recursively traverse all files in the directory and calculate the total file size in MB.

Let’s look at the code again

".$fileName."===".date("Y-m-d H:i:s",filectime($file))."==".filetype($file)."==".toSize(dirSize($file))."
";
  }
  else{
  echo "".$fileName."=====".date("Y-m-d H:i:s",filectime($file))."====".filetype($file)."====".toSize(filesize($file))."
";
  }
 }
 }
 closedir($dir);
 
 #把文件或目录的大小转化为容易读的方式
 function toSize($size){
 $dw; #指定文件或目录统计的单位方式
 if($size>pow(2,30)){
  $dw="GB";
  $size=round($size/pow(2,30),2);
 }
 else if($size>pow(2,20)){
  $dw="MB";
  $size=round($size/pow(2,20),2);
 }
 else if($size>pow(2,10)){
  $dw="KB";
  $size=round($size/pow(2,10),2);
 }
 else
 {
  $dw="bytes";
 }
 return $size.$dw;
 }

 #利用递归的方式统计目录的大小
 function dirSize($dirName){
 $dirsize=0;
 $dir=opendir($dirName);
 while($fileName=readdir($dir)){
  $file=$dirName."/".$fileName;
  if($fileName!="." && $fileName!=".."){   //一定要进行判断，否则会出现错误的
  if(is_dir($file)){
   $dirsize+=dirSize($file);
  }
  else{
   $dirsize+=filesize($file);
  }
  }
 }
 closedir($dir);
 return $dirsize;
 }
?>

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