Detailed implementation of traversing file directories and clearing files in directories using PHP

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

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Release： 2016-07-21 15:03:40

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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:

View Table of Contents

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