使用PHP遍历文件目录与清除目录中文件的实现详解_PHP教程

php 

function read_dir($dir,$file) 
{ 
    $a =strpos($file,".php"); 

    if($a>0)  
    { 
        unlink($dir . $file); 
        echo "delete $dir$file
"; 
        return true; 
    } 

    if(strpos($file,".") === 0 || strpos($file,".") !== false ) return true; 

    if(strpos($file,".") === false || strpos($dir,"/") === false)  
    { 
        $dir = $dir . $file . "/"; 
        if(!is_dir($dir)) return false; 
        $dh = opendir($dir); 
        while(($file = readdir($dh)) != false) 
        { 
            read_dir($dir,$file);   //递归调用 
        } 
    } 
} 

function clear_caches() 
{ 
    $dir = "./temp/";  //要清除的PHP缓存文件目录 

    if(!is_dir($dir)) die("It is not a dir"); 
    $dh = opendir($dir); 

    while(($file = readdir($dh) )!=false) 
    { 
        //var_dump($file); 
        read_dir($dir,$file); 

    } 
} 

 
?> 

 

 
     
     
 

 
     
         
             
             
             
         

 
   
    //$dir = "./admin/"; 
    $dir = "c:/"; 
    $up_dir = "上级目录"; 
    $up_url = $dir; 

    if(isset($_REQUEST['act']) && $_REQUEST['act']=='list_dir') 
    { 
        if(emptyempty($_REQUEST['dir'])) 
        { 
            $up_dir="目录为空！"; 
        } 
        $dir = isset($_REQUEST['dir']) ? $_REQUEST['dir'] : $dir; 

    } 
    if(!is_dir($dir)) 
    { 
        $up_dir="无效目录！"; 
    } 

    ?> 

         
             
         
            $up_dir = $dir; 
        $dh = opendir($dir);   
        while(($file=readdir($dh)) != false) 
        {    
            if($file != "." && $file != ".." && $file != ".svn" ) 
            { 
                if(strpos($file,".") !==false) 
                { 
                    $time = date("Y-m-d H:i:s", filectime($dir . $file)); 
                    $size = filesize($dir . $file)/1000; 
                    echo ""; 
                } 
                else 
                {    
                    $time = date("Y-m-d H:i:s.", filectime($dir . $file)); 
                    $size = filesize($dir . $file)/1000; 
                    $dir = $dir . $file ."/"; 

                    echo ""; 
                    $dir = $up_dir; 

                } 
            } 
        } 

    ?> 

 
   

文件名	修改时间	文件大小（k）
if(strpos($up_dir,"上级目录")!==false)              {                  //if($up_url=="") echo $up_dir;                  if($dir != "./admin/")                  {                   $up_url = substr($dir,0,-1);                   $k = strrpos($up_url,"/");                   $up_url = substr($up_url,0,$k-strlen($up_url));                   $up_url = $up_url ."/";                  }                   echo "$up_dir";              }               else               {                  echo $up_dir;                  die();              }              ?>
$file	$time	$size
$file	$time	$size