1 <?php
 2 
 3 namespace OpenCloud\Common;
 4 
 5 class ArrayAccess implements \ArrayAccess
 6 {
 7     protected $elements;
 8 
 9     public function __construct($data = array())
10     {
11         $this->elements = (array) $data;
12     }
13 
14     /**
15      * Sets a value to a particular offset.
16      *
17      * @param mixed $offset
18      * @param mixed $value
19      */
20     public function offsetSet($offset, $value)
21     {
22         if ($offset === null) {
23             $this->elements[] = $value;
24         } else {
25             $this->elements[$offset] = $value;
26         }
27     }
28 
29     /**
30      * Checks to see whether a particular offset key exists.
31      *
32      * @param mixed $offset
33      * @return bool
34      */
35     public function offsetExists($offset)
36     {
37         return array_key_exists($offset, $this->elements);
38     }
39 
40     /**
41      * Unset a particular key.
42      *
43      * @param mixed $offset
44      */
45     public function offsetUnset($offset)
46     {
47         unset($this->elements[$offset]);
48     }
49 
50     /**
51      * Get the value for a particular offset key.
52      *
53      * @param mixed $offset
54      * @return mixed|null
55      */
56     public function offsetGet($offset)
57     {
58         return $this->offsetExists($offset) ? $this->elements[$offset] : null;
59     }
60 }
61 

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