Comments on: PHP: Swap Variables One Liner

By: miah

miah — Mon, 23 Feb 2009 16:31:53 +0000

$a = ‘bar’;
$b = ‘foo’;

$a = $a ^ $b;
$b = $a ^ $b;
$a = $a ^ $b;

echo $a . $b;

// it is faster and needs less memory

By: Aquaricat

Aquaricat — Fri, 24 Oct 2008 18:06:41 +0000

Doesn’t this just introduce the overhead of creating a temporary array? If the value of XOR swapping is that it saves memory, wouldn’t doing this just waste double the memory of making a single temporary variable?

By: Swapping values in PHP | Ehsan Akhgari

Swapping values in PHP | Ehsan Akhgari — Mon, 28 Jul 2008 21:10:21 +0000

[...] It’s always a good thing to search for something cool that you’ve found before blogging it, to make sure that others have not already done the same! It even helped me see a PHP trick that should be familiar to seasoned C/C++ programmers… [...]

By: Swapping Two Variables in One Line With PHP - Ninedays Blog - web development, photography, tutorials and adventure

Thu, 27 Dec 2007 18:09:34 +0000

[...] And then one day while perusing the internet I found an even easier solution on Optimus Pete – PHP Swap Variables One Liner. [...]

By: Mark Simon

Mark Simon — Wed, 22 Aug 2007 13:37:55 +0000

… except that it makes it easier to write another one-liner like this:

if(whatever) list($a,$b)=array($b,a);