


PH gets the current url path and server path summary (url gets the current path server path), ph current path
The following are some of the ways to get the path in php A little knowledge, hope it helps you!
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
demo: 1
http://www.xxx.com/(Open the homepage directly) Result: $_SERVER["QUERY_STRING"] = "" $_SERVER["REQUEST_URI"] = "/" $_SERVER[ "SCRIPT_NAME"] = "/index.php" $_SERVER["PHP_SELF"] = "/index.php"
demo: 2
http://www.xxx.com/?p=1 (with query) Result: $_SERVER["QUERY_STRING"] = "p=1" $_SERVER["REQUEST_URI"] = "/?p=1" $_SERVER["SCRIPT_NAME"] = "/index.php" $_SERVER["PHP_SELF"] = "/index.php"
demo 3
http://www.xxx.com/index.php?p=1&q=xxx Result: $_SERVER["QUERY_STRING"] = "p=1&q=xxx" $_SERVER["REQUEST_URI" ] = "/index.php?p=1&q=xxx" $_SERVER["SCRIPT_NAME"] = "/index.php" $_SERVER["PHP_SELF"] = "/index.php"
$_SERVER["QUERY_STRING"] gets the query statement. It can be seen from the example that the value after ? is obtained. $_SERVER["REQUEST_URI"] obtains the value after http://www.xxx.com, including / $_SERVER ["SCRIPT_NAME"] Get the path of the current script, such as: index.php $_SERVER["PHP_SELF"] The file name of the currently executing script
Current url: "http://".$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF']
To summarize, for QUERY_STRING, REQUEST_URI, SCRIPT_NAME and PHP_SELF, an in-depth understanding will help us correctly call these four values in the $_SERVER function. Learn the differences between the four variables QUERY_STRING, REQUEST_URI, SCRIPT_NAME and PHP_SELF in the $_SERVER function through detailed examples.
$_SERVER["REQUEST_URI"]: Get the complete URL of the current request [except domain name]
The arrangement is slightly unclear, please point out...

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In PHP, iterating through session data can be achieved through the following steps: 1. Start the session using session_start(). 2. Iterate through foreach loop through all key-value pairs in the $_SESSION array. 3. When processing complex data structures, use is_array() or is_object() functions and use print_r() to output detailed information. 4. When optimizing traversal, paging can be used to avoid processing large amounts of data at one time. This will help you manage and use PHP session data more efficiently in your actual project.

The session realizes user authentication through the server-side state management mechanism. 1) Session creation and generation of unique IDs, 2) IDs are passed through cookies, 3) Server stores and accesses session data through IDs, 4) User authentication and status management are realized, improving application security and user experience.


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