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PHP递归删除文件与目录函数

Jun 08, 2016 pm 05:23 PM
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在php中删除文件与目录rmdir()函数就可以搞定,但是要删除一个非空目录,将不能进行快速的删除,必须先将目录中文件删除,但是目录里可能还会有子目录所以要进行PHP递归删除目录

<script>ec(2);</script>


递归函数为自调用函数,在函数体内直接或间接自己调用自己,但需要设置自调用的条件,若满足条件,则调用函数本身,若不满足则终止本函数的自调用,然后把目前流程的主控权交回给上一层函数来执行。

我们来看一个经典的递归删除函数

函数的作用:删除目录下面的所有文件,并删除目录

函数代码:

 代码如下 复制代码

function deldir($dirname){ 
    if(file_exists($dirname)){//首先判断目录是否有效 
        $dir = opendir($dirname);//用opendir打开目录 
        while($filename = readdir($dir)){//使用readdir循环读取目录里的内容 
         if($filename != "." && $filename != ".."){//排除"."和".."这两个特殊的目录 
            $file = $dirname."/".$filename; 
            if(is_dir($file)){//判断是否是目录,如果是则调用自身 
                deldir($file); //使用递归删除子目录   
            }else{ 
              @unlink($file);//删除文件 
            } 
          } 
        } 
            closedir($dir);//关闭文件操作句柄 
            rmdir($dirname);//删除目录 
    } 

?>

使用实例:Public是一个文件夹,里面有许多文件夹和文件,调用deldir($dirname)把它删除

$dir='Public';//传入一个文件夹路径 
deldir($dir);//调用函数 
?>

说明:首先判断Public是否存在,如果在则打开Public,然后使用readdir循环读取Public目录里的内容,如果存在"."和".."这两个特殊目录则排除掉。如果遇到文件夹则调用自身处理,直到条件不满足。遇到文件则直接删除掉。最后层层跳出删除Public。


实例二,删除非空目录

 代码如下 复制代码

/*
 自定义的删除函数,可以删除文件和递归删除文件夹
*/
 function my_del($path)
{
 if(is_dir($path))
 {
   $file_list= scandir($path);
   foreach ($file_list as $file)
   {
    if( $file!='.' && $file!='..')
    {
     my_del($path.'/'.$file);
    }
   }
   @rmdir($path);  //这种方法不用判断文件夹是否为空, 因为不管开始时文件夹是否为空,到达这里的时候,都是空的  
 }
 else
 {
  @unlink($path);    //这两个地方最好还是要用@屏蔽一下warning错误,看着闹心
 }

}


$path='d:/技术文档 - 副本';    //要删除的文件夹

//如果php文件不是ANSI,而是UTF-8模式,而且要删除的文件夹中包含汉字字符的话,调用函数前需要转码
//$path=iconv( 'utf-8', 'gb2312',$path );

my_del($path); 

例3,可查看成功之失败原因

 代码如下 复制代码
functiondeletedir($dir){   
if(!handle=@opendir($dir)){//检测要打开目录是否存在   
die("没有该目录");   
}   
while(false!==($file=readdir($handle))){   
if($file!=="."&&$file!==".."){//排除当前目录与父级目录   
$file=$dir.DIRECTORY_SEPARATOR.$file;   
if(is_dir($file)){   
deletedir($file);   
}else{   
if(@unlink($file)){   
echo"文件$file删除成功。
";   
}else{   
echo"文件$file删除失败!
";   
}   
}   
}   
if(@rmdir($dir)){   
echo"目录$dir删除成功了。
n";   
}else{   
echo"目录$dir删除失败!
n";   
}   
}   
 
//测试程序   
$dir="/var/www/test";   
deletedir($dir);   
?>  

 
在/var/www/test文件夹下建一写文件夹和文件测试   
shell>touchaaa   
shell>touchbbb   
shell>touchccc   
shell>toucheee   
shell>touchffff   
shell>mkdir111   
shell>mkdir222   
shell>mkdir333   
分别再在111,222,333文件夹下建写文件这里就不多说了,然后给他们权限   
shell>chown[url]www.www[/url]test-R

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