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  1. <?php
  2. function swap(&$a, &$b) {
  3.     $a = $a ^ $b;
  4.     $b = $a ^ $b;
  5.     $a = $a ^ $b;
  6. }
  7.  
  8. $a = "One - 1";
  9. $b = "Two - 2!!!";
  10.  
  11. echo $a . $b . "\n"; // One - 1Two - 2!!!
  12.  
  13. swap($a, $b);
  14.  
  15. echo $a . $b; // Two - 2One - 1
Success #stdin #stdout 0.01s 24448KB
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One - 1Two - 2!!!
Two - 2One - 1
https://ideone.com/sFt2AG
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
public

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