如何在yii2上使用等于当前日期的动作函数进行参数？

Question

I want $startdate to equal the current date dynamically.

This is my code:

public function actionNextcourses($startdate = '2016-04-02' )
{
    $nextcourses = Courses::find()->where('start_date > :startdate', [':startdate'=>$startdate])->all();
    return $this->render('nextcourses', ['nextcourses'=>$nextcourses]);
}
public function actionPrevcourses($startdate = '2016-04-02')
{
    $prevcourses = Courses::find()->where('start_date < :startdate', [':startdate'=>$startdate])->all();
    return $this->render('prevcourses', ['prevcourses'=>$prevcourses]);
}

Answer 1

You could solve using null default value:

public function actionNextcourses($startdate = null )
{
    if($startDate == null) $startDate = date('Y-m-d');

    $nextcourses = Courses::find()->where('start_date > :startdate', [':startdate'=>$startdate])->all();
    return $this->render('nextcourses', ['nextcourses'=>$nextcourses]);
}