有一条错误消息,标题已经发送,表明print_r发生了错误,但是在教程中,print_r的数组出现在网页顶部的导航栏之前
class PostController extends AppController
{
public function actionTest()
{
$names = ['Ivanov', 'Petrov', 'Sidorov'];
print_r($names);
return $this->render('test');
}
}
答案 0 :(得分:1)
You shuold在返回之前不输出echo,print_r或var_dump ..的值
class PostController extends AppController
{
public function actionTest()
{
$names = ['Ivanov', 'Petrov', 'Sidorov'];
return $this->render('test');
}
}
就您而言,删除print_r($names);