PHP delete folder operation function and several methods example code summary

unlink() function is used to delete files. Returns true if successful, false if failed. The rmdir() function is used to delete empty directories. It attempts to delete the directory specified by dir. The directory must be empty and must have appropriate permissions.
An example: Delete all ".svn" folders under a certain folder (including their contents must also be deleted).

<?php 
function delsvn($dir) { 
$dh=opendir($dir); 
//找出所有".svn" 的文件夹： 
while ($file=readdir($dh)) { 
if($file!="." && $file!="..") { 
$fullpath=$dir."/".$file; 
if(is_dir($fullpath)) { 
if($file==".svn"){ 
delsvndir($fullpath); 
}else{ 
delsvn($fullpath); 
} 
} 
} 
} 
closedir($dh); 
} 
function delsvndir($svndir){ 
//先删除目录下的文件： 
$dh=opendir($svndir); 
while($file=readdir($dh)){ 
if($file!="."&&$file!=".."){ 
$fullpath=$svndir."/".$file; 
if(is_dir($fullpath)){ 
delsvndir($fullpath); 
}else{ 
unlink($fullpath); 
} 
} 
} 
closedir($dh); 
//删除目录文件夹 
if(rmdir($svndir)){ 
return true; 
}else{ 
return false; 
} 
} 
$dir=dirname(FILE); 
//echo $dir; 
delsvn($dir); 
?>

php method example code for deleting a folder:

Recursive method:

deleteDir($dir)
{
if (rmdir($dir)==false && is_dir($dir)) {
    if ($dp = opendir($dir)) {
     while (($file=readdir($dp)) != false) {
      if (is_dir($file) && $file!='.' && $file!='..') {
       deleteDir($file);
      } else {
       unlink($file);
      }
     }
     closedir($dp);
    } else {
     exit('Not permission');
    }
}
}

System call method

function del_dir($dir)
{
if(strtoupper(substr(PHP_OS, 0, 3)) == 'WIN') {
       $str = "rmdir /s/q " . $dir;
} else {
       $str = "rm -Rf " . $dir;
}
}

Loop method

function deltree($pathdir)
{
echo $pathdir;//我调试时用的
if(is_empty_dir($pathdir))//如果是空的
      {
      rmdir($pathdir);//直接删除
      }
      else
      {//否则读这个目录，除了.和..外
          $d=dir($pathdir);
          while($a=$d->read())
          {
          if(is_file($pathdir.'/'.$a) && ($a!='.') && ($a!='..')){unlink($pathdir.'/'.$a);}
          //如果是文件就直接删除
          if(is_dir($pathdir.'/'.$a) && ($a!='.') && ($a!='..'))
          {//如果是目录
              if(!is_empty_dir($pathdir.'/'.$a))//是否为空
              {//如果不是，调用自身，不过是原来的路径+他下级的目录名
              deltree($pathdir.'/'.$a);
              }
              if(is_empty_dir($pathdir.'/'.$a))
              {//如果是空就直接删除
              rmdir($pathdir.'/'.$a);
              }
          }
          }
          $d->close();          
      echo "必须先删除目录下的所有文件";//我调试时用的
      }
}
function is_empty_dir($pathdir)
{
//判断目录是否为空，我的方法不是很好吧？只是看除了.和..之外有其他东西不是为空
$d=opendir($pathdir);
$i=0;
      while($a=readdir($d))
      {
      $i++;
      }
closedir($d);
if($i>2){return false;}
else return true;
}

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