PHP:session_register()的用法_Session函数

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(PHP 4, PHP 5 < 5.4.0)

session_register — Register one or more global variables with the current session

session_register() accepts a variable number of arguments, any of which can be either a string holding the name of a variable or an array consisting of variable names or other arrays. For each name, session_register() registers the global variable with that name in the current session.

You can also create a session variable by simply setting the appropriate member of the $_SESSION or $HTTP_SESSION_VARS (PHP < 4.1.0) array.<?php//Useofsession_register()isdeprecated$barney="Abigpurpledinosaur.";session_register("barney");//Useof$_SESSIONispreferred,asofPHP4.1.0$_SESSION["zim"]="Aninvaderfromanotherplanet.";//Theoldwaywastouse$HTTP_SESSION_VARS$HTTP_SESSION_VARS["spongebob"]="He'sgotsquarepants.";?>

If session_start() was not called before this function is called, an implicit call to session_start() with no parameters will be made. $_SESSION does not mimic this behavior and requires session_start() before use.

本函数已自 PHP 5.3.0 起废弃并将自PHP 5.4.0 起移除。

name

A string holding the name of a variable or an array consisting of variable names or other arrays.

成功时返回 TRUE， 或者在失败时返回 FALSE。

If you want your script to work regardless of register_globals, you need to instead use the $_SESSION array as $_SESSION entries are automatically registered. If your script uses session_register(), it will not work in environments where the PHP directive register_globals is disabled.

Note: register_globals 重要说明：

自 PHP 4.2.0 起，PHP 指令 register_globals 的默认值为 off。PHP 社区鼓励开发者不要依赖于此指令, 用其他手段替代，例如superglobals。

This registers a global variable. If you want to register a session variable from within a function, you need to make sure to make it global using the global keyword or the $GLOBALS[] array, or use the special session arrays as noted below.

If you are using $_SESSION (or $HTTP_SESSION_VARS), do not use session_register(), session_is_registered(), and session_unregister().

Note:

It is currently impossible to register resource variables in a session. For example, you cannot create a connection to a database and store the connection id as a session variable and expect the connection to still be valid the next time the session is restored. PHP functions that return a resource are identified by having a return type of resource in their function definition. A list of functions that return resources are available in the resource types appendix.

If $_SESSION (or $HTTP_SESSION_VARS for PHP 4.0.6 or less) is used, assign values to $_SESSION. For example: $_SESSION[&#;var&#;] = &#;ABC&#;;

session_is_registered() - 检查变量是否在会话中已经注册 session_unregister() - Unregister a global variable from the current session $_SESSION

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