PHP implementation of statistical directory file size function _php skills

Morning just to the company, the head told me, to write a small function, used to statistics specified in the directory file size, I have a go, do it, fortunately a little foundation, a will be completed, haha. The code is below.

? 
/** 
 Statistics Directory file size function 
 @author xfcode 
* 
 /function dirsize ($dir) 
 { 
@ $dh = Opendir ($dir); 
 $size = 0; 
 while ($file = @readdir ($DH)) 
{ 
 if ($file!= "." and $file!= "...") 
{ 
 $path = $dir. "　　　　　/". $file; 
 if (Is_dir ($path)) 
{ 
$size + = Dirsize ($path); 
 } 
ElseIf (Is_file ($path)) 
{ 
 $size + + = filesize ($path); 
 @closedir ($DH)}}}; return 
 $size; 
 } 
Function End 
 
//eg: 
 $dir _path = "./my_files"; 
 $dir _size = dirsize ($dir _path); 
 $dir _size = $dir _size/1024/1024; 
 Echo $dir _size. " MB "; 
 ? > 

This function recursively iterates through all the files in the directory and calculates the total size of the files in megabytes.

Let's take a look at the code here.

<?php #循环遍历目录中所有的文件, and statistics the size of directories and files $dirName = "phpMyAdmin"; $dir =opendir ($dirName); #返回一个资源类型 while ($fileName =readdir ($dir)) {$file = $dirName. "
 /". $fileName; if ($fileName!= "." && $fileName!= "...") {if (Is_dir ($file)) {echo "<font color= ' Red ' >". $fileName. " = = = ". Date (" Y-m-d h:i:s ", Filectime ($file))." = = ". FileType ($file)." = = ". Tosize (Dirsize ($file))."
  </font><br/> "; else{echo "<font color= ' green ' >". $fileName. " ===== ". Date (" Y-m-d h:i:s ", Filectime ($file))." = = = ". FileType ($file)." = = = ". Tosize (FileSize ($file))."
  </font><br/> ";
 
 }} 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!= "." && $fileName!= "...")
  {//must be judged, otherwise there will be an error if (Is_dir ($file)) {$dirsize +=dirsize ($file);
  else{$dirsize +=filesize ($file);
 }} closedir ($dir);
 return $dirsize; }?>