布满荆棘的人生 2022-04-17 04:22 275阅读 0赞

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>