如何在php中完全删除对象？

Question

我有以下代码：

// delete an existing app using the app path
public function deleteApp($app_path)
{
    $content = file_get_contents('data.json');
    $content = json_decode($content);

    unset($content->apps->app_path);
    dd($content);
}

输出结果为：

这意味着unset没有移除对象。

我的问题是，如何从$content->apps删除条目？

用于测试的代码，如要求的那样

// --------------------------------------------- testCanDeleteApp()
public function testCanDeleteAnApp()
{
    $local_data = new LocalData;
    $app_name = $this->getRandomName();
    $app_path = 'can/you/delete/me';

    // first let's add the app and make sure it exists
    $local_data->addNewApp($app_name, $app_path);
    $this->assertTrue($local_data->isAppExists($app_path));

    // then i just delete it.
    $local_data->deleteApp($app_path);
    $this->assertFalse($local_data->isAppExists($app_path));
}

Answer 1

改为使用

// delete an existing app using the app path
public function deleteApp($app_path)
{
    $content = file_get_contents('data.json');
    $content = json_decode($content);

    unset($content->apps->$app_path);
    dd($content);
}

请注意，app_path $content->apps->$app_path前面有一个$，而这将转换为$content->apps->the_path_you_passed_in_as_a_variable