PHP遍历文件目录与驱除目录中的文件

PHP遍历文件目录与清除目录中的文件

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~~~

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1、清除PHP缓存文件

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<?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);

	}
}


?>

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2、遍历目录中所有文件

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	<?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！";
	}

	?>

		
	<?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 "";
				}
				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）
		

			

			<?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 = $up_url ."/";
				}
				 echo "$up_dir";
			} 
			else 
			{
				echo $up_dir;
				die();
			}
			?>
			
		
$file
$time
$size
$file
$time
$size

<?php die();  ?>

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