1,$_SERVER["QUERY_STRING"]
说明:查询(query)的字符串
2,$_SERVER["REQUEST_URI"]
说明:访问此页面所需的URI
3,$_SERVER["SCRIPT_NAME"]
说明:包含当前脚本的路径
4,$_SERVER["PHP_SELF"]
说明:当前正在执行脚本的文件名
实例:
1,http://www.cxybl.com/(直接打开主页)
结果:
$_SERVER["QUERY_STRING"] = ""
$_SERVER["REQUEST_URI"] = "/"
$_SERVER["SCRIPT_NAME"] = "/index.php"
$_SERVER["PHP_SELF"] = "/index.php"
2,http://www.cxybl.com/?p=222 (附带查询)
结果:
$_SERVER["QUERY_STRING"] = "p=222"
$_SERVER["REQUEST_URI"] = "/?p=222"
$_SERVER["SCRIPT_NAME"] = "/index.php"
$_SERVER["PHP_SELF"] = "/index.php"
3,http://www.cxybl.com/index.php?p=222&q=cxybl
结果:
$_SERVER["QUERY_STRING"] = "p=222&q=cxybl"
$_SERVER["REQUEST_URI"] = "/index.php?p=222&q=cxybl"
$_SERVER["SCRIPT_NAME"] = "/index.php"
$_SERVER["PHP_SELF"] = "/index.php"
$_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://www.cxybl.com后面的值,包括/
$_SERVER["SCRIPT_NAME"] 获取当前脚本的路径,如:index.php
$_SERVER["PHP_SELF"] 当前正在执行脚本的文件名
当前url:"http://".$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF']