For the 2nd time: references ARE NOT POINTERS! :-p
--Jani
On Thu, 19 Jan 2006, Marco Kaiser wrote:
Hmm yes i know this,
but its very interesting for me to see how php internaly handles ++$a with a
pointer.
Now i understand it :)
-- Marco
2006/1/19, Marcus Boerger <helly@php.net>:
Hello Marco,
though Hartmut is perfectly correct in his statement here's what
happens:
$a = 10; // 10
++$a // 11
$a + $a // 22
$a++ // 23
Thursday, January 19, 2006, 5:41:17 PM, you wrote:
Today during a session i had a strange "magic" feature found in php.
<?php
$a = 10;
echo ++$a + $a++;
?>>
just to verfiy echo $a after your echo line, it will show 12
this works perfect as expected. it returns 22.
but if i assign $a as a ref. to another variable it will be return 23.
<?
$a = 10;
$b = &$a;
echo ++$a + $a++;
?>>
this will gave me to 23
(used the $b to the pre post stuff)
<?
$a = 10;
$b = &$a;
echo ++$b + $b++;
?>>
this just happens if i have a ref. count to my var. WHY? :)
http://en.wikipedia.org/wiki/23_%28film%29
--
Marco Kaiser
Best regards,
Marcus
--
Marco Kaiser
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