使用PHP遍历文件目录与清除目录中文件的实现详解

时间：2021-05-25

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 <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); //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:
<html>

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

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


<?php

//$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！";
}

?>

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

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 = $up_url ."/";
}
echo "<a href=\"test.php?act=list_dir&dir=$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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