[binarycloud-dev] Comparison function/sorting in $Page->_init_modules

[Justin F. <je...@ey...>]

Alex:

Perhaps this is a question proper for the PHP list, but since
I have been scratching my head over something I found in Page.php,
I am asking for edification.

Now I am an old C programmer and I am familiar with Lvalues
and Rvalues and memory layout and references.  And I have
written many a comparison functions to sort data structures
to pass as arguments into xxx_cmp() functions.

BUT, I don't understand:

	uasort($this->modules[$group], array(&$this,'_ary_sort'));

where the second argument is "normally" supposed to be the
function to be used for the sorting, user supplied.  I just
don't understand why this works.  The knee-jerk call would
be:

	 uasort($this->modules[$group],&$this->_ary_sort);

which doesn't work, and messing about with it I got a
facinating error message coughed up by PHP (probably from
Zeev) that was in transliterated/ASCII'ized Hebrew.  It
made me pause for a moment to think how marvelous open
source is......

How is this idiom of using an array getting the Lvalue of
the function???

This is probably a waste of everybody's time.  I hope
someone else wondered.


-- 
Justin Farnsworth
Eye Integrated Communications
321 South Evans - Suite 203
Greenville, NC 27858 | Tel: (252) 353-0722