使用PHP遍歷文件目錄與清除目錄中文件的實現詳

2020-03-22 19:10:46

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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

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