Description:
------------
when running this line of code
new APCIterator('user', '/^Attributes__/', APC_ITER_KEY);

I get this error - 

 Uncaught exception 'ErrorException' with message 'APCIterator::__construct() 
expects parameter 2 to be long, string given'

This is what the documentation states concerning the constructor params - 

public APCIterator::__construct ( string $cache [, mixed $search = null [, int 
$format [, int $chunk_size = 100 [, int $list ]]]] )

Specifically for the $search param (param 2) the documentation states - 

A PCRE regular expression that matches against APC key names, either as a string 
for a single regular expression, or as an array of regular expressions. Or, 
optionally pass in NULL to skip the search.

Test script:
---------------
new APCIterator('user', $search, APC_ITER_KEY);

Expected result:
----------------
I expect to get back an APCIterator object

Actual result:
--------------
fatal error