4 * Copyright (c) 2013 Ben Ramsey <http://benramsey.com>
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
25 namespace Symfony\Polyfill\Php55;
30 final class Php55ArrayColumn
32 public static function array_column(array $input, $columnKey, $indexKey = null)
36 foreach ($input as $row) {
38 $keySet = $valueSet = false;
40 if ($indexKey !== null && array_key_exists($indexKey, $row)) {
42 $key = (string) $row[$indexKey];
45 if ($columnKey === null) {
48 } elseif (is_array($row) && array_key_exists($columnKey, $row)) {
50 $value = $row[$columnKey];
55 $output[$key] = $value;