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✏️ Editing: Php55ArrayColumn.php

<?php

/*
 *   Copyright (c) 2013 Ben Ramsey <http://benramsey.com>
 *
 *   Permission is hereby granted, free of charge, to any person obtaining a
 *   copy of this software and associated documentation files (the "Software"),
 *   to deal in the Software without restriction, including without limitation
 *   the rights to use, copy, modify, merge, publish, distribute, sublicense,
 *   and/or sell copies of the Software, and to permit persons to whom the
 *   Software is furnished to do so, subject to the following conditions:
 *
 *   The above copyright notice and this permission notice shall be included in
 *   all copies or substantial portions of the Software.
 *
 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 *   DEALINGS IN THE SOFTWARE.
 */

namespace Symfony\Polyfill\Php55;

/**
 * @internal
 */
final class Php55ArrayColumn
{
    public static function array_column(array $input, $columnKey, $indexKey = null)
    {
        $output = array();

foreach ($input as $row) {
            $key = $value = null;
            $keySet = $valueSet = false;

if ($indexKey !== null && array_key_exists($indexKey, $row)) {
                $keySet = true;
                $key = (string) $row[$indexKey];
            }

if ($columnKey === null) {
                $valueSet = true;
                $value = $row;
            } elseif (\is_array($row) && \array_key_exists($columnKey, $row)) {
                $valueSet = true;
                $value = $row[$columnKey];
            }

if ($valueSet) {
                if ($keySet) {
                    $output[$key] = $value;
                } else {
                    $output[] = $value;
                }
            }
        }

return $output;
    }
}

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