Contao\CoreBundle\DataContainer\PaletteManipulator::explode PHP Method

    private function explode($palette)
    {
        if ('' === (string) $palette) {
            return [];
        }
        $legendCount = 0;
        $legendMap = [];
        $groups = StringUtil::trimsplit(';', $palette);
        foreach ($groups as $group) {
            $hide = false;
            $fields = StringUtil::trimsplit(',', $group);
            if (preg_match('#\\{(.+?)(:hide)?\\}#', $fields[0], $matches)) {
                $legend = $matches[1];
                $hide = count($matches) > 2 && ':hide' === $matches[2];
                array_shift($fields);
            } else {
                $legend = $legendCount++;
            }
            $legendMap[$legend] = ['fields' => $fields, 'hide' => $hide];
        }
        return $legendMap;
    }