(PHP 4, PHP 5)
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.
// Use of session_register() is deprecated
$barney = "A big purple dinosaur.";
// Use of $_SESSION is preferred, as of PHP 4.1.0
$_SESSION["zim"] = "An invader from another planet.";
// The old way was to use $HTTP_SESSION_VARS
$HTTP_SESSION_VARS["spongebob"] = "He's got square pants.";
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.Warning
自 PHP 5.3.0 起，已经废弃此函数。强烈建议不要应用此函数 。
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.Caution
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';