94 lines
2.3 KiB
PHP
94 lines
2.3 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2010-2021, the Friendica project
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Friendica\Util;
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/**
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* Array utility class
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*/
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class Arrays
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{
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/**
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* Private constructor
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*/
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private function __construct() {
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// Utitlities don't have instances
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}
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/**
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* Implodes recursively a multi-dimensional array where a normal implode() will fail.
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*
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* @param array $array Array to implode
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* @param string $glue Glue for imploded elements
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* @return string String with elements from array
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*/
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public static function recursiveImplode(array $array, $glue) {
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// Init returned string
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$string = '';
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// Loop through all records
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foreach ($array as $element) {
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// Is an array found?
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if (is_array($element)) {
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// Invoke cursively
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$string .= '{' . self::recursiveImplode($element, $glue) . '}' . $glue;
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} else {
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// Append normally
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$string .= $element . $glue;
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}
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}
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// Remove last glue
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$string = trim($string, $glue);
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// Return it
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return $string;
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}
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/**
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* walks recursively through an array with the possibility to change value and key
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*
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* @param array $array The array to walk through
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* @param callable $callback The callback function
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*
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* @return array the transformed array
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*/
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static public function walkRecursive(array &$array, callable $callback)
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{
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$new_array = [];
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foreach ($array as $k => $v) {
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if (is_array($v)) {
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if ($callback($v, $k)) {
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$new_array[$k] = self::walkRecursive($v, $callback);
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}
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} else {
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if ($callback($v, $k)) {
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$new_array[$k] = $v;
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}
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}
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}
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$array = $new_array;
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return $array;
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}
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}
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