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HomeBackend DevelopmentPHP TutorialHow to achieve unlimited directory traversal in PHP development

在php开发中,我们会经常遇到各种各样的难题,想要实现php无限遍历目录,可就很难实现这一方法,经过在网上查询一些资料,阅读一些论坛,才发现php无限遍历目录并没有想象那么难,现在就看一下吧。

使用的函数有:

isset()判断某个变量是否定义

chdir() 将当前目录改变为指定的目录。

opendir() 打开目录。

readdir()读取目录。

getcwd()。获取当前目录。

还用到了for if GET传值 大概就这些东东:

下面是代码:

<?php
if(isset($_GET[&#39;id&#39;]))//判断是否传值
{
$s=str_replace(&#39; &#39;,&#39;+&#39;,$_GET[&#39;id&#39;]);
$s=base64_decode($s);//接受传递的值 值一般是要打开的目录的绝对路劲
chdir($s);//切换到要打开的目录
}
$a=opendir(&#39;.&#39;);//打开当前目录
while(false!==($c=readdir($a)))//循环遍历目录内容的文件名
{
if(is_dir($c))//判断是目录还是文件
{
if($c==&#39;.&#39;)
{
}
else
{
if($c==&#39;..&#39;)
{
$w=base64_encode(substr(getcwd(),0,strrpos(getcwd(),&#39;\\&#39;)));//当前路径加上目录名 就是目录的绝对路径
echo "上一级"."<a href="http://www.php1.cn/">
}else
{
$w=base64_encode(getcwd().&#39;\\&#39;.$c);//当前路径加上目录名 就是目录的绝对路径
echo "$c"."<a href="http://www.php1.cn/">
}
}
}
else
{
echo "$c 不是目录<br />";
}
}
?>

以上就是php无限遍历目录的全部内容,大家在学习的时候需要注意一个问题,就是路径一定要是绝对路径,千万不要弄错了,希望能帮助到大家。


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