Differences between QUERY_STRING, REQUEST_URI, SCRIPT_NAME, and PHP_SELF in php $ _ SERVER

Differences between QUERY_STRING, REQUEST_URI, SCRIPT_NAME, and PHP_SELF in php $ _ SERVER

This article describes the differences between QUERY_STRING, REQUEST_URI, SCRIPT_NAME, and PHP_SELF in the global variables $ _ SERVER in php. For more information, see. Learn and understand the usage of the following php global variables. 1, $ _ SERVER ["QUERY_STRING"] description: query string 2, $ _ SERVER ["REQUEST_URI"] description: the URI required to access this page 3, $ _ SERVER ["SCRIPT_NAME"] description: path containing the current script 4, $ _ SERVER ["PHP_SELF"] description: file name of the script being executed Instance: 1, http://bbs.it-home.org/(directly open the home page) result: $ _ SERVER ["QUERY_STRING"] = "" $ _ SERVER ["REQUEST_URI"] = "/" $ _ SERVER ["SCRIPT_NAME"] = "/index. php "$ _ SERVER [" PHP_SELF "] ="/index. php" 2, http: // www. jbxue.com /? P = 222 (with query) result: $ _ SERVER ["QUERY_STRING"] = "p = 222" $ _ SERVER ["REQUEST_URI"] = "/? P = 222 "$ _ SERVER [" SCRIPT_NAME "] ="/index. php "$ _ SERVER [" PHP_SELF "] ="/index. php" 3, http: // www. jbxue.com/index.php? P = 222 & q = jbxue result: $ _ SERVER ["QUERY_STRING"] = "p = 222 & q = jbxue" $ _ SERVER ["REQUEST_URI"] = "/index. php? P = 222 & q = jbxue "$ _ SERVER [" SCRIPT_NAME "] ="/index. php "$ _ SERVER [" PHP_SELF "] ="/index. php" $ _ SERVER ["QUERY_STRING"]: obtain the query statement. Which of the following statements can be obtained in the instance? The following value $ _ SERVER ["REQUEST_URI"] gets the value after the http://www.jbxue.com, including/$ _ SERVER ["SCRIPT_NAME"] to get the path of the current script, such as index. php $ _ SERVER ["PHP_SELF"] file name of the script currently being executed Current url: "http: //". $ _ SERVER ['http _ host']. $ _ SERVER ['php _ SELF '] Summary: for QUERY_STRING, REQUEST_URI, SCRIPT_NAME, and PHP_SELF, an in-depth understanding is helpful for correctly calling these four values in the $ _ SERVER function.