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  1. <?php
  2.  
  3.  
  4. class A
  5. {
  6. 	protected $valores = ['gato' => '@Gato'];
  7.  
  8. 	public function __get($key)
  9. 	{
  10. 		return $this->valores[$key];
  11. 	}
  12. }
  13.  
  14. class B extends A
  15. {
  16. 	public function __isset($key)
  17. 	{
  18. 		return isset($this->valores[$key]);
  19. 	}
  20. }
  21.  
  22.  
  23. $a = new A;
  24. $b = new B;
  25.  
  26.  
  27. var_dump($a->gato);
  28. var_dump(isset($a->gato));
  29.  
  30. var_dump($b->gato);
  31. var_dump(isset($b->gato));
Success #stdin #stdout 0.01s 82880KB
comments (?)
stdin 
Standard input is empty
stdout 
string(5) "@Gato"
bool(false)
string(5) "@Gato"
bool(true)
https://ideone.com/RNzdsG
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
public

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