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HomeBackend DevelopmentPHP Tutorialphp实例分享之通过递归实现删除目录下的所有文件详解_php实例

先贴代码:

复制代码 代码如下:

function delFile($dirName){ 
 if ($handle = opendir("$dirName")){
  while (($item = readdir($handle))!=false){
   if ($item!="." && $item!="..")  {
    if ( is_dir( "$dirName/$item" ) ) { 
             delFile( "$dirName/$item" ); 
       } else unlink("$dirName/$item");
  }
 }
 closedir($handle);
}
?>


 delFile('/home/sources');
?>

先讲解几个函数:

opendir() :函数打开一个目录句柄,可由 closedir(),readdir() 和 rewinddir() 使用。

若成功,则该函数返回一个目录流,否则返回 false 以及一个 error。可以通过在函数名前加上 "@" 来隐藏 error 的输出。例如$dir=@ opendir("image");

readdir():返回由opendir函数打开的目录句柄中的条目,即顺序返回文件夹中的文件名,顺序按照文件系统中制定的排序方式。

id_dir():即检测参数文件是否为目录,如果是返回true.

un_link():即删除制定文件。

所以程序执行思路为:函数调用主目录,然后顺序检测每一文件是否为目录,如果为目录则递归调用函数,并对不为目录的文件进行删除,直到遍历完所有的文件。

这个程序只实现删除文件夹里面的内容,而没有删除文件夹本身,如果要实现这一目的,加上下面代码即可:

复制代码 代码如下:

rmdir($dirName);
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