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PHP SPL ArrayAccess Iterator countable class

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use an object as an array

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  1. class array_test implements ArrayAccess, Iterator, Countable 
  2. {
  3. 	private $container = array();
  4.  
  5. 	public function __construct() {}
  6.  
  7. 	/*
  8. 	* to use ArrayAccess
  9. 	*/
  10. 	public function offsetSet($offset,$value) 
  11. 	{
  12. 		if ($offset == "")
  13. 		{
  14. 			$this->container[] = $value;
  15. 		}
  16. 		else 
  17. 		{
  18. 			$this->container[$offset] = $value;
  19. 		}
  20. 	}
  21.  
  22. 	/*
  23. 	* to use ArrayAccess
  24. 	*/
  25. 	public function offsetExists($offset) 
  26. 	{
  27. 		return isset($this->container[$offset]);
  28. 	}
  29.  
  30. 	/*
  31. 	* to use ArrayAccess
  32. 	*/
  33. 	public function offsetUnset($offset) 
  34. 	{
  35. 		unset($this->container[$offset]);
  36. 	}
  37.  
  38. 	/*
  39. 	* to use ArrayAccess
  40. 	*/
  41. 	public function offsetGet($offset) 
  42. 	{
  43. 		return isset($this->container[$offset]) ? $this->container[$offset] : null;
  44. 	}
  45.  
  46. 	/*
  47. 	* to use Iterator
  48. 	*/
  49. 	public function rewind() 
  50. 	{
  51. 		reset($this->container);
  52. 	}
  53.  
  54. 	/*
  55. 	* to use Iterator
  56. 	*/
  57. 	public function current() 
  58. 	{
  59. 		return current($this->container);
  60. 	}
  61.  
  62. 	/*
  63. 	* to use Iterator
  64. 	*/
  65. 	public function key() 
  66. 	{
  67. 		return key($this->container);
  68. 	}
  69.  
  70. 	/*
  71. 	* to use Iterator
  72. 	*/
  73. 	public function next() 
  74. 	{
  75. 		return next($this->container);
  76. 	}
  77.  
  78. 	/*
  79. 	* to use Iterator
  80. 	*/
  81. 	public function valid() 
  82. 	{
  83. 		return $this->current() !== false;
  84. 	}   
  85.  
  86. 	/*
  87. 	* to use Countable
  88. 	*/
  89. 	public function count() 
  90. 	{
  91. 		return count($this->container);
  92. 	}
  93. }

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