Yii2 如何使用 isGuest 将新的临时项目添加到 NavBar 项目

Question

我是 Yii2 的新手，最近下载了该框架的基本应用版本。 “main.php”文件中有一段代码：

echo Nav::widget([
    'options' => ['class' => 'navbar-nav navbar-right'],
    'items' => [
        ['label' => 'Main', 'url' => ['/site/index']],
        ['label' => 'Countries', 'url' => ['/country/countries']],
        ['label' => 'About us', 'url' => ['/site/about']],
        ['label' => 'Contacts', 'url' => ['/site/contact']],
        Yii::$app->user->isGuest ? (
                ['label' => 'Login', 'url' => ['/user/login']]
        ) : (
            '<li>'
            . Html::beginForm(['/user/logout'], 'post')
            . Html::submitButton(
                'Logout(' . Yii::$app->user->identity->username . ')',
                ['class' => 'btn btn-link logout']
            )
            . Html::endForm()
            . '</li>'
        )
    ]
]);

我想在其中添加注册 link 像这样：

Yii::$app->user->isGuest ? (
                ['label' => 'Login', 'url' => ['/user/login']],
                ['label' => 'Register', 'url' => ['/user/registration']]
        ) : (
            '<li>'
            . Html::beginForm(['/user/logout'], 'post')
            . Html::submitButton(
                'Logout(' . Yii::$app->user->identity->username . ')',
                ['class' => 'btn btn-link logout']
            )

我知道这段代码是错误的，但我想问一下，我怎样才能正确地做到这一点？

Answer 1

您的尝试无效，因为您使用的三元运算符只允许 1 个值而不是 2 个值。登录和注册是2个数组。

可能的解决方案：

// What everybody sees
$items = [
    ['label' => 'Main', 'url' => ['/site/index']],
    ['label' => 'Countries', 'url' => ['/country/countries']],
    ['label' => 'About us', 'url' => ['/site/about']],
    ['label' => 'Contacts', 'url' => ['/site/contact']],
];

// What only guests see
if (Yii::$app->user->isGuest) {
    $items[] = ['label' => 'Registration', 'url' => ['/user/registration']];
    $items[] = ['label' => 'Login', 'url' => ['/user/login']];
}

// What logged in users see
else {
    $items[] = '<li>'
        . Html::beginForm(['/user/logout'], 'post')
        . Html::submitButton(
            'Logout(' . Yii::$app->user->identity->username . ')',
            ['class' => 'btn btn-link logout']
        )
        . Html::endForm()
        . '</li>';
}

// Echo your navigation
echo Nav::widget([
    'options' => ['class' => 'navbar-nav navbar-right'],
    'items' => $items,
]);

Yii2 如何使用 isGuest 将新的临时项目添加到 NavBar 项目

Yii2 How to add a new temporary item to NavBar items using isGuest

php

yii2

yii2-basic-app