Description:
------------
The documentation fails to mention that the $prepend parameter was added in php 
5.3



Test script:
---------------
<?php

function foo($class) {}
function bar($class) {}

spl_autoload_register('foo');
spl_autoload_register('bar', true, true);
$funcs = spl_autoload_functions();
assert('bar' == $funcs[0]);
assert(2 == count($funcs));
print_r($funcs);

Expected result:
----------------
According to the documentation, the two assertions in the test scripts should 
pass for any php version >= 5.1.2. However, the two assertions fail in 5.2.13.

Expected output
Array
(
    [0] => bar,
    [1] => foo
)


Actual result:
--------------
Warning: assert(): Assertion failed in blah.php on line 9
Warning: assert(): Assertion failed in blah.php on line 10
Array
(
    [0] => foo
)