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解析php中获取url与物理路径的总结

Jun 13, 2016 am 11:46 AM
php url one time and address Summarize document physics of Obtain parse path

在这里我想总结一下取得地址栏内URL及文件所属的我更路径的一些信息:
运用$_SERVER[ ]我们可以来完成许多事情:它是一个包含头部(headers),路径信息及脚本位置的数组,数组的实体由web服务器创建。
这是一个“superglobal”,或者可以描述为自动全局变量。这只不过意味这它在所有的脚本中都有效。在函数或方法中您不需要使用global $_SERVER; 访问它,就如同使用 $HTTP_SERVER_VARS 一样。
$HTTP_SERVER_VARS 包含着同样的信息,但是不是一个自动全局变量。(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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