Array.php

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<?php

class Twig_Extensions_Extension_Array extends Twig_Extension
{
    public function getFilters()
    {
        $filters = array(
             new Twig_SimpleFilter('shuffle', 'twig_shuffle_filter'),
        );

        return $filters;
    }

    public function getName()
    {
        return 'array';
    }
}

function twig_shuffle_filter($array)
{
    if ($array instanceof Traversable) {
        $array = iterator_to_array($array, false);
    }

    shuffle($array);

    return $array;
}

class_alias('Twig_Extensions_Extension_Array', 'Twig\Extensions\ArrayExtension', false);