( mixed name [, mixed ...])
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.
If you want your script to work regardless of register_globals,
you need to instead use the
as $_SESSION entries are automatically
registered. If your script uses
session_register(), it will not work in
environments where the PHP directive
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.
This function returns TRUE when all of the variables are successfully
registered with the session.
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.
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.";
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';
See also session_is_registered(),