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  1. <?php
  2.  
  3. abstract class Book
  4. {
  5. 	// public $format = ['HARD', 'POCKET'];
  6. 	protected $_price;
  7.  
  8. 	public function __construct($price)
  9. 	{
  10. 		$this->_price = setPrice($price);
  11. 	}
  12.  
  13. 	public function setPrice($price)
  14. 	{   
  15. 		if ($price > 0)  { 
  16. 		 	$this->_price= $price;
  17. 		} else { 
  18. 			throw new Exception("Price cannot be less than 0");        
  19. 		}  
  20. 	}
  21.  
  22. 	public function getPrice()
  23. 	{   
  24. 		return $this->_price;  
  25. 	}
  26.  
  27.  
  28. }
  29.  
  30. class Hard extends Book
  31. {
  32.  
  33. 	public function __construct($price){
  34. 		$this->setPrice($price);
  35. 	}
  36.  
  37. 	public function setPrice($price){
  38. 		$this->_price= $price+ $price * 1/4;
  39. 	}
  40. }
  41.  
  42. class Pocket extends Book
  43. {
  44. 	public function __construct($price){
  45. 		$this->setPrice($price);
  46. 	}
  47.  
  48. }
  49. class BookFactory
  50. {
  51.  
  52. 	public static function add($format, $price){
  53. 		$format = ucwords($format);
  54. 		if(class_exists($format)) {
  55.            return new $format($price);
  56. 		} else {
  57. 			throw new Exception('Format not supported.');
  58. 		}
  59. 	}
  60.  
  61. }
  62.  
  63. $book1 = BookFactory::add('HARD',600);
  64. echo "The " . get_class($book1) . " is \${$book1->getPrice()}";
  65. echo "\r\n"; 
  66. $book2 = BookFactory::add('pocket',600);
  67. echo "The " . get_class($book2) . " is \${$book2->getPrice()}";
Success #stdin #stdout 0.02s 82560KB
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The Hard is $750
The Pocket is $600
https://ideone.com/Vk1V6e
language:
PHP (php 7.3.5)
created:
4 years ago
visibility:
secret

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