


PHP Chinese URL encoding and decoding detailed instructions_PHP tutorial
, urldecode() and rawurldecode() decode the string in UTF-8 format. If the URL contains Chinese and the page setting is not UTF-8, the decoded string must be encoded. Conversion to display normally
php tutorial Chinese url encoding and decoding details
In php, urlencode and rawurlencode encode Chinese
string urlencode (string str)
Returns a string in which all non-alphanumeric characters except -_. are replaced with a percent sign (%) followed by two hexadecimal digits. This is the encoding described in RFC 1738, and is intended to protect literal characters from being interpreted as special URL delimiters, and to protect the URL format from being garbled by character conversions used by the transport medium (like some email systems)
*/
$a ='?a=中文';
$urlencode =urlencode($a);
echo $urlencode; //%3fa%3d%d6%d0%ce%c4
/*
string rawurldecode (string str)
Returns a string in which the percent sign (%) followed by a sequence of two hexadecimal digits will be replaced with literal characters.
*/
$c = rawurlencode($urlencode);///a%253d%25d6%25d0%25ce%25c4;
echo $c;
/*
One thing to note is that the string decoded by urldecode() and rawurldecode() is encoded in utf-8 format. If the url contains Chinese and the page setting is not utf-8, you must Convert the decoded string to display it normally

PHPsessionstrackuserdataacrossmultiplepagerequestsusingauniqueIDstoredinacookie.Here'showtomanagethemeffectively:1)Startasessionwithsession_start()andstoredatain$_SESSION.2)RegeneratethesessionIDafterloginwithsession_regenerate_id(true)topreventsessi

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.

Tostoreauser'snameinaPHPsession,startthesessionwithsession_start(),thenassignthenameto$_SESSION['username'].1)Usesession_start()toinitializethesession.2)Assigntheuser'snameto$_SESSION['username'].Thisallowsyoutoaccessthenameacrossmultiplepages,enhanc

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Methods to debug session problems in PHP include: 1. Check whether the session is started correctly; 2. Verify the delivery of the session ID; 3. Check the storage and reading of session data; 4. Check the server configuration. By outputting session ID and data, viewing session file content, etc., you can effectively diagnose and solve session-related problems.

Multiple calls to session_start() will result in warning messages and possible data overwrites. 1) PHP will issue a warning, prompting that the session has been started. 2) It may cause unexpected overwriting of session data. 3) Use session_status() to check the session status to avoid repeated calls.

Configuring the session lifecycle in PHP can be achieved by setting session.gc_maxlifetime and session.cookie_lifetime. 1) session.gc_maxlifetime controls the survival time of server-side session data, 2) session.cookie_lifetime controls the life cycle of client cookies. When set to 0, the cookie expires when the browser is closed.


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