Webmaster Forums UK SEO SEM Webmaster Community Forum - UKWW - View Single Post - Tip : Swap values of two variables without using a third variable

#3 (**permalink**) 04-09-2008, 01:31 PM

Another good method, a bit more involved but gets the job done. Here's another method using ^ (XOR) operator :

Code:

<?php
  $a = 10;
  $b = 20;
  
  echo '$a => ' , $a, ' $b => ', $b, '<br />';
  
  $a = $a ^ $b;
  $b = $a ^ $b;
  $a = $a ^ $b;
  
  echo '$a => ' , $a, ' $b => ', $b, '<br />';
?>