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  1. <?php
  2.  
  3. class Point2D
  4. {
  5. 	private $x;
  6. 	private $y;
  7.  
  8. 	public function __construct($x, $y)
  9. 	{
  10. 		$this->x = x;
  11. 		$this->y = y;
  12. 	}
  13.  
  14. 	public function getX()
  15. 	{
  16. 		return $this->x;
  17. 	}
  18.  
  19. 	public function getY()
  20. 	{
  21. 		return $this->y;
  22. 	}
  23. }
  24.  
  25. class Point3D extends Point2D
  26. {
  27. 	private $z;
  28.  
  29. 	public function __construct($x, $y, $z)
  30. 	{
  31. 		parent::__construct($x, $y);
  32. 		$this->z = $z;
  33. 	}
  34.  
  35. 	public function getZ()
  36. 	{
  37. 		return $this->z;
  38. 	}
  39. }
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https://ideone.com/JBf2VC
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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