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72 lines
2.1 KiB
72 lines
2.1 KiB
<?php |
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/** |
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* ArrayHelper class file. |
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* |
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* @link http://www.yiiframework.com/ |
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* @copyright Copyright © 2008-2012 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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namespace yii\util; |
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/** |
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* ArrayHelper provides additional array functionality you can use in your |
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* application. |
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* |
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* @author Qiang Xue <qiang.xue@gmail.com> |
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* @since 2.0 |
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*/ |
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class ArrayHelper extends \yii\base\Component |
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{ |
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/** |
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* Merges two or more arrays into one recursively. |
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* If each array has an element with the same string key value, the latter |
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* will overwrite the former (different from array_merge_recursive). |
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* Recursive merging will be conducted if both arrays have an element of array |
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* type and are having the same key. |
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* For integer-keyed elements, the elements from the latter array will |
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* be appended to the former array. |
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* @param array $a array to be merged to |
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* @param array $b array to be merged from. You can specify additional |
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* arrays via third argument, fourth argument etc. |
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* @return array the merged array (the original arrays are not changed.) |
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*/ |
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public static function merge($a, $b) |
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{ |
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$args = func_get_args(); |
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$res = array_shift($args); |
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while ($args !== array()) { |
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$next = array_shift($args); |
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foreach ($next as $k => $v) { |
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if (is_integer($k)) { |
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isset($res[$k]) ? $res[] = $v : $res[$k] = $v; |
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} elseif (is_array($v) && isset($res[$k]) && is_array($res[$k])) { |
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$res[$k] = self::merge($res[$k], $v); |
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} else { |
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$res[$k] = $v; |
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} |
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} |
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} |
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return $res; |
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} |
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/** |
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* Retrieves the value of an array element with the specified key. |
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* |
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* If the key does not exist in the array, the default value will be returned instead. |
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* For example, |
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* |
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* ~~~ |
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* $username = \yii\util\ArrayHelper::get($_POST, 'username'); |
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* ~~~ |
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* |
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* @param array $array array to extract value from |
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* @param string $key key name of the array element |
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* @param mixed $default the default value to be returned if the specified key does not exist |
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* @return mixed |
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*/ |
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public static function get($array, $key, $default = null) |
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{ |
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return isset($array[$key]) || array_key_exists($key, $array) ? $array[$key] : $default; |
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} |
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} |