What is #[] construct in PHP / Yii2?

Yii 2.0 General Discussions
1

I’ve been long, long time away from Yii 2. When I’ve come back, I have noticed a #[] construct for arrays, used by Yii 2, coming most likely from PHP 8:

#[AtLeast(['email', 'phone'])]
#[Required]
#[Length(min: 2)]

I did some Internet search for this:

But found nothing.

Can anyone shed some light here or point me to the right piece of documentation. Thank you.

2

This is Yii 3.

You are looking at new attributes syntax.

3

Thank you for your explanation.