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Homephp教程php手册探讨PHP删除文件夹的三种方法

探讨PHP删除文件夹的三种方法

Jun 13, 2016 am 11:49 AM
dirphprmdircodedeletecopyDiscussfoldermethodofrecursion

1、递归法

复制代码 代码如下:


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');
    }
}
}


2、系统调用法

复制代码 代码如下:


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


3、循环法

复制代码 代码如下:


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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