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  1. <?php
  2.  
  3. class JSObject implements ArrayAccess {
  4.     private $data = array();
  5.  
  6.     function __construct($d) {
  7.         $this->data = array_replace($this->data, $d);
  8.     }
  9.  
  10.     public function __set($name, $value) {
  11.         $this->data[$name] = $value;
  12.     }
  13.     public function __get($name) {
  14.         global $undefined;
  15.         if(array_key_exists($name, $this->data)) {
  16.             return $this->data[$name];
  17.         } else {
  18.             return $undefined;
  19.         }
  20.     }
  21.     public function __isset($name) {
  22.         return array_key_exists($name, $this->data);
  23.     }
  24.     public function __unset($name) {
  25.         if(array_key_exists($name, $this->data)) {
  26.             unset($this->data[$name]);
  27.         }
  28.     }
  29.  
  30.     public function offsetExists($item) {
  31.         return $this->__isset($item);
  32.     }
  33.     public function offsetGet($item) {
  34.         return $this->__get($item);
  35.     }
  36.     public function offsetSet($item, $value) {
  37.         $this->__set($item, $value);
  38.     }
  39.     public function offsetUnset($item) {
  40.         $this->__unset($item);
  41.     }
  42.  
  43.     function __toString() {
  44.         return '[object Object]';
  45.     }
  46.  
  47.     public function __debugInfo() {
  48.         return $this->data;
  49.     }
  50. }        
  51.  
  52. class JSUndefined implements ArrayAccess {
  53.     public function __set($name, $value) {
  54.         global $undefined;
  55.         return $undefined;
  56.     }
  57.     public function __get($name) {
  58.         global $undefined;
  59.         return $undefined;
  60.     }
  61.     public function __isset($name) {
  62.         global $undefined;
  63.         return $undefined;
  64.     }
  65.     public function __unset($name) {
  66.         global $undefined;
  67.         return $undefined;
  68.     }
  69.  
  70.     public function offsetExists($item) {
  71.         global $undefined;
  72.         return $undefined;
  73.     }
  74.     public function offsetGet($item) {
  75.         global $undefined;
  76.         return $undefined;
  77.     }
  78.     public function offsetSet($item, $value) {
  79.         global $undefined;
  80.         return $undefined;
  81.     }
  82.     public function offsetUnset($item) {
  83.         global $undefined;
  84.         return $undefined;
  85.     }
  86.  
  87.     function __toString() {
  88.         return 'undefined';
  89.     }
  90. }
  91.  
  92. $undefined = new JSUndefined();
  93.  
  94.  
  95. $x = new JSObject(['a' => 12]);
  96. echo sprintf("%s | %s\n", $x, print_r($x, true));
  97.  
  98. echo sprintf("(%s, %s)\n", $x->a, $x['a']);
  99.  
  100. $x->a = 42;
  101.  
  102. echo sprintf("(%s, %s)\n", $x->a, $x['a']);
  103.  
  104. $x['b'] = 43;
  105.  
  106. echo sprintf("(%s, %s)\n", $x->b, $x['b']);
  107.  
  108. unset($x->b);
  109.  
  110. echo sprintf("%s\n", $x->b);
  111.  
  112. echo sprintf("%s\n", var_export($x->b == $undefined, true));
  113.  
  114. echo sprintf("%s\n", print_r($x, true));
  115.  
Success #stdin #stdout 0s 82560KB
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stdin
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Standard input is empty
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[object Object] | JSObject Object
(
    [a] => 12
)

(12, 12)
(42, 42)
(43, 43)
undefined
true
JSObject Object
(
    [a] => 42
)
https://ideone.com/s1D1r8
language:
PHP (php 7.3.5)
created:
6 years ago
visibility:
public

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