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PHP获取当前路径和目录的示例

Jun 13, 2016 am 09:40 AM
php code and accomplish of Table of contents Example Obtain path

 

代码如下  


/**
 * PHP获取路径或目录实现
 * @link http://www.45it.com
 */
 
//魔术变量,获取当前文件的绝对路径
echo "__FILE__:  ========>  ".__FILE__; 
echo '
';
 
//魔术变量,获取当前脚本的目录
echo "__DIR__:  ========>  ".__DIR__;
echo '
';
 
//dirname返回路径的目录部分,dirname(__FILE__)相当于__DIR__
echo "dirname(__FILE__):  ========>  ".dirname(__FILE__);
echo '
';
 
//$_SERVER['PHP_SELF']和$_SERVER['SCRIPT_NAME']的结果一般相同,他们都是获取当前脚本的文件名
//只有当php以cgi方式运行时有区别,但是现在几乎找不到以cgi方式运行php了
echo '$_SERVER["PHP_SELF"]:  ========>  '.$_SERVER['PHP_SELF'];
echo '
';
 
echo '$_SERVER["SCRIPT_NAME"]:  ========>  '.$_SERVER['SCRIPT_NAME'];
echo '
';
 
//当前执行脚本的绝对路径。记住,在CLI方式运行php是获取不到的
echo '$_SERVER["SCRIPT_FILENAME"]:  ========>  '.$_SERVER['SCRIPT_FILENAME'];
echo '
';
 
//当前运行脚本所在的文档根目录。在服务器配置文件中定义。
echo '$_SERVER["DOCUMENT_ROOT"]:  ========>  '.$_SERVER['DOCUMENT_ROOT'];
echo '
';
 
//getcwd()返回当前工作目录
echo "getcwd():  ========>  ".getcwd();
echo '
';
 
echo '
';
echo "php教程(www.45it.com)整理";

  (注意: $HTTP_SERVER_VARS 和 $_SERVER 是不同的变量,PHP 处理它们的方式不同。)如果设置了 register_globals 指令,这些变量也在所有脚本中可用;也就是,分离了 $_SERVER 和 $HTTP_SERVER_VARS 数组。

  $_SERVER['HTTP_HOST'] 取得当前请求的Host:头部内容

  $_SERVER['PHP_SELF']这可能是我们最为经常用到的了,它返回当前调用 的页的文件名,如果是http://localhost/test/2005/test.php, 那么将会返回/test/2005/test.php

  $_SERVER['SCRIPT_NAME']它将返回包含当前脚本的路径。这在页面需要指向自己时非常有用

  $_SERVER['SCRIPT_FILENAME']它将返回当前文件所在的绝对路径信息

  $_SERVER['REQUEST_URI']返回访问此页面所需的URI,包括"/"

  当然还有许多路径函数:

  dirname(),返回路径信息中的目录部分,前面是带有"/"的

  basename()返回路径中的基本的文件名部分,当然也可以设置后缀来控制输出。

  realpath(),返回路径信息的绝对规范化的路径

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