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<?php |
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/** |
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* @copyright 2017 Vladimir Jimenez |
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* @license https://github.com/allejo/stakx/blob/master/LICENSE.md MIT |
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*/ |
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namespace allejo\stakx\Utilities; |
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abstract class ArrayUtilities |
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{ |
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/** |
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* @param array $array |
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* |
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* @return bool |
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*/ |
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public static function is_multidimensional(array &$array) |
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{ |
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foreach ($array as &$element) |
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{ |
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if (is_array($element)) |
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{ |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* Check whether the elements of a multidimensional array can be indexed based on a key. |
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* |
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* In the following example, the array can be indexed with the 'name' key. |
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* |
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* ```php |
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* array( |
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* array('name' => 'sample 1'), |
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* array('name' => 'sample 2'), |
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* array('name' => 'sample 3'), |
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* ) |
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* ``` |
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* |
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* @param array $arr |
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* @param string $indexKey The key to consider the index |
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* |
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* @return bool |
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*/ |
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public static function array_can_be_indexed(array &$arr, $indexKey) |
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{ |
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foreach ($arr as &$value) |
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{ |
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if (isset($value[$indexKey]) && is_scalar($value[$indexKey])) |
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{ |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* Index an array passed on given key. |
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* |
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* The resulting array would be as follows when indexed by the 'name' key. |
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* |
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* ```php |
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* array( |
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* 'sample 1' => array('name' => 'sample 1'), |
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* 'sample 2' => array('name' => 'sample 2'), |
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* 'sample 3' => array('name' => 'sample 3'), |
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* ) |
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* ``` |
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* |
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* @param array $arr |
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* @param string $indexKey |
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* |
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* @see ArrayUtilities::array_can_be_indexed() |
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* |
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* @return array The original array but each element's key will be the value of the element's key value |
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*/ |
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public static function array_index_by_key(array &$arr, $indexKey) |
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{ |
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$result = array(); |
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foreach ($arr as &$value) |
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{ |
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if (isset($value[$indexKey]) && is_scalar($value[$indexKey])) |
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{ |
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$result[$value[$indexKey]] = $value; |
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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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* Merge two arrays together while respecting possible indexing. |
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* |
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* @param array $arr1 The first array |
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* @param array $arr2 The values in this array will overwrite the respective values from $arr2 |
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* @param string $indexKey The key to respect when indexing |
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* |
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* @see ArrayUtilities::array_index_by_key() |
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* |
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* @return array |
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*/ |
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public static function array_merge_defaults(array &$arr1, array &$arr2, $indexKey) |
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{ |
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$merged = $arr1; |
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foreach ($arr2 as $key => &$value) |
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{ |
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if (is_array($value) && isset($arr1[$key])) |
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{ |
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if (self::array_can_be_indexed($value, $indexKey)) |
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{ |
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$indexedArr1 = self::array_index_by_key($arr1[$key], $indexKey); |
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$indexedArr2 = self::array_index_by_key($value, $indexKey); |
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$merged[$key] = array_merge($indexedArr1, $indexedArr2); |
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} |
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else |
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{ |
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$merged[$key] = array_merge($arr1[$key], $value); |
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} |
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continue; |
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} |
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$merged[$key] = $value; |
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} |
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return $merged; |
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} |
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/** |
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* Split an associative array into two chunks based on the position of a key. |
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* |
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* @param string $key The key we'll be using as the splitting point |
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* @param array $array The array we're splitting up |
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* @param bool $inclusive When set to true, the key being used as the splitting point will be incorporated in the |
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* first chunk of the split. |
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* |
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* @return array An array with two indices (0 & 1) containing the respective chunks of the array |
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*/ |
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public static function associative_array_split($key, array &$array, $inclusive = true) |
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{ |
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$offset = array_search($key, array_keys($array)) + (int)$inclusive; |
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$result = array(); |
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$result[0] = array_slice($array, 0, $offset, true); |
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$result[1] = array_slice($array, $offset, null, true); |
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9 |
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return $result; |
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} |
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} |
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stakx-io /
stakx
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