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PHP下几种删除目录的方法总结_php技巧

May 17, 2016 am 09:39 AM

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。

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