bool mkdir ( string pathname [, intpathname[,intmode = 0777 [, bool recursive = false [, resourcerecursive=false[,resourcecontext ]]] )

**注：切記排除目錄下的.和..，否則會刪除整個磁盤內(nèi)容，且不進(jìn)回收站！**
 function deleteDir($dirname){
 $dir=opendir($dirname);
 while($filename=readdir($dir)){
 if($filename!=='.'&&$filename!=='..'){
 $filename=$dirname.'/'.$filename;
 if(is_dir($filename)){
 deleteDir($filename);
 }else{
 unlink($filename);
 }
 }
 
 } 
 
 closedir($dir);
 rmdir($dirname);
 }
 deleteDir('test');