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<?php |
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/** |
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* @link http://www.yiiframework.com/ |
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* @copyright Copyright (c) 2008 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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namespace yii\base; |
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/** |
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* ArrayAccessTrait provides the implementation for [[\IteratorAggregate]], [[\ArrayAccess]] and [[\Countable]]. |
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* |
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* Note that ArrayAccessTrait requires the class using it contain a property named `data` which should be an array. |
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* The data will be exposed by ArrayAccessTrait to support accessing the class object like an array. |
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* |
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* @property array $data |
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* |
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* @author Qiang Xue <[email protected]> |
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* @since 2.0 |
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*/ |
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trait ArrayAccessTrait |
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{ |
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/** |
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* Returns an iterator for traversing the data. |
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* This method is required by the SPL interface [[\IteratorAggregate]]. |
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* It will be implicitly called when you use `foreach` to traverse the collection. |
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* @return \ArrayIterator an iterator for traversing the cookies in the collection. |
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*/ |
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public function getIterator() |
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{ |
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return new \ArrayIterator($this->data); |
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} |
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/** |
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* Returns the number of data items. |
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* This method is required by Countable interface. |
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* @return int number of data elements. |
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*/ |
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public function count() |
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{ |
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return count($this->data); |
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} |
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/** |
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* This method is required by the interface [[\ArrayAccess]]. |
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* @param mixed $offset the offset to check on |
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* @return bool |
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*/ |
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public function offsetExists($offset) |
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{ |
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return isset($this->data[$offset]); |
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} |
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/** |
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* This method is required by the interface [[\ArrayAccess]]. |
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* @param int $offset the offset to retrieve element. |
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* @return mixed the element at the offset, null if no element is found at the offset |
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*/ |
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public function offsetGet($offset) |
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{ |
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return isset($this->data[$offset]) ? $this->data[$offset] : null; |
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} |
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/** |
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* This method is required by the interface [[\ArrayAccess]]. |
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* @param int $offset the offset to set element |
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* @param mixed $item the element value |
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*/ |
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public function offsetSet($offset, $item) |
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{ |
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$this->data[$offset] = $item; |
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} |
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/** |
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* This method is required by the interface [[\ArrayAccess]]. |
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* @param mixed $offset the offset to unset element |
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*/ |
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public function offsetUnset($offset) |
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{ |
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unset($this->data[$offset]); |
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} |
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} |
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yiisoft /
yii2
