Detailed implementation of traversing file directories and clearing files in directories using PHP_PHP Tutorial

Today, I was bored and practiced the program of PHP traversing file directories. I wrote the following two programs, but the quality is not very good. Pat~~~
1. Clear PHP cache files

Copy code The code is as follows:

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)
                                                    while(($file = readdir($dh)) != false)
                                                                                                                                                            >
function clear_caches()
{
$dir = "./temp/"; //The directory of PHP cache files to be cleared

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

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

2. Traverse all files in the directory




Copy the code

The code is as follows:

TR & GT;
& LT; Th width = "50%" & gt; file name & lt;/th & gt;
& lt; th width = "25%" & gt; modify time & lt;/th & gt;
$dir = "./admin/";
$dir = "c:/";
$up_dir = "Superior directory";
$up_url = $dir;

if( isset($_REQUEST['act']) && $_REQUEST['act']=='list_dir')
{
if(emptyempty($_REQUEST['dir']))
{ >               $up_dir="The directory is empty!";                                     
if(!is_dir($dir))
{
$up_dir="Invalid directory!"; 
    } 

    ?> 

         
             
         
            $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; 

                } 
            } 
        } 

    ?> 

 
   

File size (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

 

 
 

 
 

http://www.bkjia.com/PHPjc/327822.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/327822.htmlTechArticle今天无聊中练习了一下PHP遍历文件目录的程序，编写了以下两个程序，不过质量不是很好，轻拍~~~ 1、清除PHP缓存文件 复制代码 代码如下...