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arrays can't be registered in sessions. However, you can store a serialized array:

  $arr = serialize($array);
  session_register($arr);

-daniel

I made it a documentation problem. The manual page for 'session_register()' should explicitly mention this.

@ daniel@php.net:

I hope that should be a bad joke ...

I've tested the code below with 4.1.1 and it worked.
(session support is broken in 4.1.2 AFAIK)

$bar = array(
	'something' => array( 1,2,3,4 ),
	'nothing' => NULL,
	'test' => true,
	'test2' => array( 'x','y'=>2 )
);
session_register('bar');

Just my 2cents: I also hope this is a bad joke. I haven't used sessions for quite some time but I know definitely that I've fucked the session_register() function with all kind of variables including arrays and objects and it worked (without needing to serialize them before ....) back when I used them.

It was not meant to be entertaining. I was serious, but it turned out to be an user error - sorry for the false alarm.

Here's the typo:

  session_register("arr");

instead of

  session_register($arr);

damn :)