Optimus Pete - PHP: XOR swap

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PHP: XOR swap

The XOR swap lets you swap the value of integer variables without using a temporary variable, it's also slightly faster.

PHP:

$x ^= $y;
$y ^= $x;
$x ^= $y;

I can't actually think of a good reason Why you'd want to use this in PHP since memory isn't normally a big issue, however it might be good for showing off .

// Pete Graham xXx

Comments 1

TBog wrote:
$x^=$y^=$x^=$y;
Posted 24 Nov 2007 at 3:22 pm ¶

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From Optimus Pete » Blog Archive » PHP: Swap Variables One Liner on 29 Mar 2007 at 3:27 pm ¶
[...] Much like the PHP XOR swap there’s no real reason this is any better than using a temporary variable, but you might be able to impress chicks with it or something. [...]

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