对于php$_SERVER这个全局变量 ,里面有很多的参数,慢慢的熟悉
1,http://localhost/aaa/ (打开aaa中的index.php) 结果: $_SERVER['QUERY_STRING'] = ""; $_SERVER['REQUEST_URI'] = "/aaa/"; $_SERVER['SCRIPT_NAME'] = "/aaa/index.php"; $_SERVER['PHP_SELF'] = "/aaa/index.php"; 2,http://localhost/aaa/?p=222 (附带查询) 结果: $_SERVER['QUERY_STRING'] = "p=222"; $_SERVER['REQUEST_URI'] = "/aaa/?p=222"; $_SERVER['SCRIPT_NAME'] = "/aaa/index.php"; $_SERVER['PHP_SELF'] = "/aaa/index.php"; 3,http://localhost/aaa/index.php?p=222&q=333 结果: $_SERVER['QUERY_STRING'] = "p=222&q=333"; $_SERVER['REQUEST_URI'] = "/aaa/index.php?p=222&q=333"; $_SERVER['SCRIPT_NAME'] = "/aaa/index.php"; $_SERVER['PHP_SELF'] = "/aaa/index.php"; 由实例可知: $_SERVER["QUERY_STRING"] 获取查询 语句,实例中可知,获取的是?后面的值 $_SERVER["REQUEST_URI"] 获取 http://localhost 后面的值,包括/ $_SERVER["SCRIPT_NAME"] 获取当前脚本的路径,如:index.php $_SERVER["PHP_SELF"] 当前正在执行脚本的文件名
WordPress通过301重定向实现非首先域(非www)跳转向本来是一个很简单事情,由于没弄清楚$_SERVER['HTTP_X_REWRITE_URL'] 和$_SERVER['REQUEST_URI']的区别导致了循环重定向问题。
现在来具体研究下$_SERVER['HTTP_X_REWRITE_URL'] 和$_SERVER['REQUEST_URI']的区别首先要纠正一部分的观点就是IIS+PHP$_SERVER['REQUEST_URI']常用来获当前URL
例如:http://www.hujuntao.com/index.php?p=3$_SERVER['REQUEST_URI']获得的就是/index.php?p=3这部分。$_SERVER["HTTP_X_REWRITE_URL"]则在IIS下获得的是当前URL,在apache下的值为空例如:
当前URL:http://www.hujuntao.com/IIS环境下:$_SERVER['REQUEST_URI'] = /index.php$_SERVER["HTTP_X_REWRITE_URL"] =/apache环境下:$_SERVER['REQUEST_URI'] = /$_SERVER["HTTP_X_REWRITE_URL"] =”当前URL:http://www.hujuntao.com/index.php
IIS环境下:$_SERVER['REQUEST_URI'] = /index.php$_SERVER["HTTP_X_REWRITE_URL"] =/index.phpapache环境下:$_SERVER['REQUEST_URI'] = /index.php$_SERVER["HTTP_X_REWRITE_URL"] =”