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<?php |
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/** |
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* @package Cadmium\Framework\Arr |
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* @author Anton Romanov |
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* @copyright Copyright (c) 2015-2017, Anton Romanov |
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* @link http://cadmium-cms.com |
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*/ |
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namespace { |
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abstract class Arr { |
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/** |
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* Get an array value by a given path, where path is an array of keys. |
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* This method is useful for accessing multidimensional arrays |
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* |
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* @return mixed|null : the value or null if the path does not exist |
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*/ |
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public static function get(array $array, array $path) { |
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$value = null; |
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foreach ($path as $item) if (isset($array[$item])) $value = ($array = $array[$item]); else return null; |
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# ------------------------ |
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return $value; |
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} |
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/** |
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* Select a set of elements from an array according to given keys. |
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* A result array can be optionally filtered by a given callback |
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*/ |
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public static function select(array $array, array $keys, callable $filter = null) : array { |
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$selected = array_intersect_key($array, array_flip($keys)); |
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if (null !== $filter) $selected = array_filter($array, $filter); |
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# ------------------------ |
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return $selected; |
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} |
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/** |
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* Transform an associative array to indexed. Every element of a result array will be an array of type: |
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* [$key_name => old_key, $value_name => old_value] |
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*/ |
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public static function index(array $array, string $key_name, string $value_name) : array { |
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$indexed = []; |
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foreach ($array as $key => $value) $indexed[] = [$key_name => $key, $value_name => $value]; |
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# ------------------------ |
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return $indexed; |
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} |
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/** |
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* Sort an array by a subvalue |
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*/ |
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public static function sortby(array $array, $sub_key, bool $descending = false) : array { |
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$select_key = function ($element) use ($sub_key) { return ($element[$sub_key] ?? false); }; |
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$sorted = []; $column = array_map($select_key, $array); |
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if (!$descending) asort($column); else arsort($column); |
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foreach (array_keys($column) as $key) $sorted[$key] = $array[$key]; |
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# ------------------------ |
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return $sorted; |
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} |
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/** |
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* Get a random value from an array |
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* |
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* @return mixed|null : the value or null if the array is empty |
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*/ |
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public static function random(array $array) { |
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return ($array[array_rand($array)] ?? null); |
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} |
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/** |
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* Encode an array into a 40-character hash string |
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*/ |
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public static function encode(array $array) : string { |
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return sha1(serialize($array)); |
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} |
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} |
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} |
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cadmium-org /
cadmium-cms
