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<?php
/**
* @copyright 2018 Vladimir Jimenez
* @license https://github.com/allejo/stakx/blob/master/LICENSE.md MIT
*/
namespace allejo\stakx\Templating\Twig\Extension;
class GroupByFilter extends AbstractTwigExtension implements TwigFilterInterface
{
public function __invoke($array, $sortKey)
$arr = array();
foreach ($array as $key => $item)
if (!isset($item[$sortKey]))
continue;
}
$groupBy = $item[$sortKey];
if (is_bool($groupBy))
$groupBy = ($groupBy) ? 'true' : 'false';
elseif (!is_scalar($groupBy))
trigger_error('You cannot group by a non-scalar value', E_USER_WARNING);
$arr[$groupBy][$key] = $item;
return $arr;
public static function get()
return new \Twig_SimpleFilter('group', new self());
stakx-io /
stakx
