PHP recursively traverses and deletes all files under the folder

PHP recursively deletes all files in the directory:

<?php  
Header ("Content-type:text/html;charset=utf-8");  
/** 
* Delete specified directory () Delete subdirectories and files 
* @path  file directory path string 
* @return void
/function Hello ($path) {  
// 1: Determine if the deletion directory exists if  
(!file_exists ($path)) {return  
  false;  
}  
2: The contents of the catalog are all obtained  
$list = Scandir ($path);  
3: Traverse directory  
foreach ($list as $f) {  
//4: Will ...  exclude outside  
if ($f!= '. ' && $f!= ') {  
 //5: If the content file unlink if  
 (Is_file ($path.) /". $f)) {  
  unlink ($path.".). $f);  
 } else{  
   //6: Table of Contents   recursive  
   Hello ($path.) /". $f);}}  
foreach End  
//7: Delete directory outside of loop!!  
RmDir ($path);  
      
>

PHP recursion facilitates all files in the directory:

<?php  
Header (' CONTENT-TYPE:TEXT/HTML;CHARSET=GBK ');  
Ini_set ("Date.timezone", "asia/chongqing"); 
 * * Traverse a specified directory () including subdirectories and file 
 * @param string $path Specify directory name 
 * @return viod
/class dir{  
function UPL ( $path) {  
//To determine whether the directory being processed has   no return false;  
if (!file_exists ($path)) {return  
false;  
}  
Lists the contents of the current directory  
$list =scandir ($path);  
foreach ($list as $f) {  
//Remove ...  
if ($f!= '. ') && $f!= ' ... ') {  
//judge whether it is a directory "$path." /'. $f '  
if (Is_dir ($path.) /". $f)) {//  
output      
echo $path." /". $f." <br  /> ";  
Recursively calls itself  
$this->upl ($path. " /". $f);  
} else{  
//If file exists output  
echo $path. " /". $f." <br  /> ";  
}  
} If End  
      
}//foreach end  
}  
}  
$a =new dir ();  
$a->upl ("d:/www/guo/application");