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PHP中几种删除目录的方法

Jun 21, 2016 am 09:05 AM
dir else file nbsp

 

呵呵,忽然一个朋友问我如何删除目录,比如下面有文件呢,我说用递规呀,他说太慢了。于是就总结出了下面几种办法。

1。递规法: //我提供,好像有点不对,没测试

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     //大师兄提供

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   //from: http://www.knowsky.com/1148.html

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;


呵呵,足够给各种朋友用了吧,只是按照你需要和速度来论吧。

by heiyeluren  2005/07/28


 



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