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今天無聊中練習了一下PHP遍歷文件目錄的程序，編寫了以下兩個程序，不過質量不是很好，輕拍~~~
1、清除PHP緩存文件

復制代碼代碼如下:

<?php

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

    if($a>0)
    {
        unlink($dir . $file);
        echo "delete $dir$file <br>";
        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);   //遞歸調用
        }
    }
}

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

    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、遍歷目錄中所有文件

復制代碼代碼如下:

<html>

<head>
    <meta http-enquiv="Content-Type" content="text/html;charset=gb2312">
    <title>查看目錄</title>
</head>

<body>
    <table width="600" align="center">
        <tr>
            <th width="50%">文件名</th>
            <th width="25%">修改時間</th>
            <th width="25%">文件大小（k）</th>
        </tr>

    <?php

    //$dir = "./admin/";
    $dir = "c:/";
    $up_dir = "上級目錄";
    $up_url = $dir;

    if(isset($_REQUEST['act']) && $_REQUEST['act']=='list_dir')
    {
        if(emptyempty($_REQUEST['dir']))
        {
            $up_dir="目錄為空！";
        }
        $dir = isset($_REQUEST['dir']) ? $_REQUEST['dir'] : $dir;

    }
    if(!is_dir($dir))
    {
        $up_dir="無效目錄！";
    }

    ?>

        <tr>
            <td colspan="3">
            <?php

            if(strpos($up_dir,"上級目錄")!==false)
            {
                //if($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 = $up_url ."/";
                }
                 echo "<a href=\"test.php?act=list_dir&dir=$up_url\">$up_dir</a>";
            }
            else
            {
                echo $up_dir;
                die();
            }
            ?>
            </td>
        </tr>
    <?php
        $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 . $file)/1000;
                    echo "<tr><td>$file</td><td>$time</td><td>$size</td></tr>";
                }
                else
                {
                    $time = date("Y-m-d H:i:s.", filectime($dir . $file));
                    $size = filesize($dir . $file)/1000;
                    $dir = $dir . $file ."/";

                    echo "<tr><td><a href =\"test.php?act=list_dir&dir=$dir\">$file</a></td><td>$time</td><td>$size</td></tr>";
                    $dir = $up_dir;

                }
            }
        }

    ?>

    </table>

<?php die(); ?>
</body>

</html>