Php55ArrayColumn.php
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<?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 (null !== $indexKey && array_key_exists($indexKey, $row)) {
$keySet = true;
$key = (string) $row[$indexKey];
}
if (null === $columnKey) {
$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;
}
}