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中文网

发布时间：2016-07-21 15:03:40

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来源于php中文网

原创

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:

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);

    }
}

?>

2、遍历目录中所有文件

复制代码代码如下:

    查看目录









    //$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