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Object equality comparison (comparable equals interface)

/ Published in: PHP
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Sample which shoows how to compare objects by content.

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  1. interface Comparable_Equals
  2. {
  3.     public function equals(self $other);
  4. }
  5.  
  6.  
  7. class User
  8. implements Comparable_Equals
  9. {
  10.     public function equals(self $other)
  11.     {
  12.         return $this['id'] == $other['id'];
  13.     }
  14.     // other methods
  15. }
  16.  
  17. $stancell = User::loadByUsername('stancell');
  18. $user = User::loadById(20);
  19.  
  20. echo $user->equals($stancell) ? 'The same user' : 'Different user';

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