PHP遍历文件目录与清除目录中的文件_PHP

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2011/9/22 8:14:04 bupt_roy http://bupt-roy.iteye.com 我要评论(0)

摘要：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<?phpfunctionread_dir($dir,$file){$a=strpos($file,".php");if($a>0){unlink($dir.$file);echo"delete$dir$file<br>";returntrue;}if(strpos($file,".")===0||strpos($file,".")!==false
标签：PHP 目录文件遍历

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

<?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

<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']) && $_REQUEST['act']=='list_dir')
	{
		if(empty($_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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