Question

这里的 indexAction 我必须调用 subcat 函数来递归获取类别和子类别的列表，否则它不起作用。

注意 subcat 会自行调用。

如何在indexAction外编写subcat函数？并从 IndexAction 中调用它。这样做，我可以重复使用 subcat 。

class ItemsController implements ControllerProviderInterface {
    public function connect(Application $app) {
        $controllers = $app['controllers_factory'];

        $controllers
        ->get('/', array($this, 'indexAction'))
        ->bind('items_index');

        return $controllers;
    }

    public function indexAction(Application $app) {
        $categorias = array();

        function subcat($idPadre, array & $categorias, $app) {
            $sql = 'SELECT id, categoria FROM categorias' .
                ' WHERE id_padre=' . $idPadre .
                ' ORDER BY categoria';
            $query = $app['db']->fetchAll($sql);

            foreach ($query as $valor) {
                $a = subcat($valor['id'], $categorias, $app);
                $lista[$valor['id'].'-'.$valor['categoria']] = $a;
            }

            return $lista;
        };

        $estructura = subcat(0, $categorias, $app);
        print_r($estructura);
        return '';
    }    
}

Answer 1

您可以将可重复使用的代码注册为服务。你应该在这里找到你需要的任何东西：LINK

Answer 2

我解决了这项服务，其中$ app [＆＃39; Categorias.lista＆＃39;]包含所有类别：

$app['Categorias.idPadre'] = 0;
$app['Categorias.lista'] = '';
$app['Categorias'] = $app->share(function ($app) {
    function subcat($idPadre, $app) {
        $sql = 'SELECT id, categoria FROM categorias' .
                ' WHERE id_padre=' . $idPadre .
                ' ORDER BY categoria';
        $query = $app['db']->fetchAll($sql);

        foreach ($query as $valor) {
            $lista[$valor['id'].'-'.$valor['categoria']] = subcat($valor['id'], $app);
        }

        return $lista;
    };

    $app['Categorias.lista'] = subcat($app['Categorias.idPadre'], $app);
});

然后我在我的indexAction方法中测试它：

$app['Categorias.idPadre'] = 0;
$app['Categorias'];
print_r($app['Categorias.lista']);

和print_r在我的例子中给出了这个：

Array
(
    [2-capacitor] => Array
        (
            [14-ceramico] => 
            [12-electrolitico] => 
            [13-multicapa] => 
            [16-polipropileno] => 
            [15-polyester] => 
        )

    [3-circuito impreso] => 
    [4-diodo] => 
    [1-resistencia] => Array
        (
            [11-ceramica] => 
            [5-metal] => Array
                (
                    [8-1W] => 
                    [9-2W] => 
                    [10-3W] => 
                    [7-mini] => 
                )

        )

    [20-teclado] => 
    [21-transformador] => 
    [17-transistor] => Array
        (
            [18-bipolar] => 
            [19-mosfet] => 
        )

)

Answer 3

您所要做的就是让您的内部函数成为ItemsController中的私有函数。

class ItemsController implements ControllerProviderInterface {
    public function connect(Application $app) {
        $controllers = $app['controllers_factory'];

        $controllers
        ->get('/', array($this, 'indexAction'))
        ->bind('items_index');

        return $controllers;
    }

    public function indexAction(Application $app) {
        $categorias = array();

        $estructura = $this->subcat(0, $categorias, $app);
        print_r($estructura);
        return '';
    }

    private function subcat($idPadre, array & $categorias, $app) {
        $sql = 'SELECT id, categoria FROM categorias' .
            ' WHERE id_padre=' . $idPadre .
            ' ORDER BY categoria';
        $query = $app['db']->fetchAll($sql);

        foreach ($query as $valor) {
            $a = $this->subcat($valor['id'], $categorias, $app);
            $lista[$valor['id'].'-'.$valor['categoria']] = $a;
        }

        return $lista;
    }
}

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3 个答案: