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<?php |
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/** |
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* This file is part of the Composer Merge plugin. |
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* |
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* Copyright (C) 2015 Bryan Davis, Wikimedia Foundation, and contributors |
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* |
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* This software may be modified and distributed under the terms of the MIT |
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* license. See the LICENSE file for details. |
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*/ |
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namespace Wikimedia\Composer; |
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/** |
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* Helper class to merge arrays in a deep fashion. |
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* |
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* @author Bryan Davis <[email protected]> |
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*/ |
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class NestedArray |
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{ |
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/** |
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* Merges multiple arrays, recursively, and returns the merged array. |
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* |
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* This function is similar to PHP's array_merge_recursive() function, but it |
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* handles non-array values differently. When merging values that are not both |
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* arrays, the latter value replaces the former rather than merging with it. |
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* |
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* Example: |
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* @code |
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* $link_options_1 = array('fragment' => 'x', 'attributes' => array('title' => t('X'), 'class' => array('a', 'b'))); |
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* $link_options_2 = array('fragment' => 'y', 'attributes' => array('title' => t('Y'), 'class' => array('c', 'd'))); |
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* |
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* // This results in array( |
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* // 'fragment' => array('x', 'y'), |
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* // 'attributes' => array('title' => array(t('X'), t('Y')), 'class' => array('a', 'b', 'c', 'd')) |
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* // ). |
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* $incorrect = array_merge_recursive($link_options_1, $link_options_2); |
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* |
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* // This results in array( |
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* // 'fragment' => 'y', |
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* // 'attributes' => array('title' => t('Y'), 'class' => array('a', 'b', 'c', 'd')) |
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* // ). |
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* $correct = NestedArray::mergeDeep($link_options_1, $link_options_2); |
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* @endcode |
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* |
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* Note: This function was derived from Drupal's drupal_array_merge_deep(). |
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* |
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* @param array ... |
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* Arrays to merge. |
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* |
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* @return array |
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* The merged array. |
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*/ |
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public static function mergeDeep() |
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{ |
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$arrays = func_get_args(); |
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$result = array(); |
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foreach ($arrays as $array) { |
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foreach ($array as $key => $value) { |
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// Renumber integer keys as array_merge_recursive() does. Note that PHP |
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// automatically converts array keys that are integer strings (e.g., '1') |
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// to integers. |
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if (is_integer($key)) { |
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$result[] = $value; |
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} elseif (isset($result[$key]) && is_array($result[$key]) && is_array($value)) { |
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// Recurse when both values are arrays. |
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$result[$key] = self::mergeDeep($result[$key], $value); |
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} else { |
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// Otherwise, use the latter value, overriding any previous value. |
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$result[$key] = $value; |
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} |
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} |
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} |
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return $result; |
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} |
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} |
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wikimedia /
composer-merge-plugin
