Problem with laravel ORM $append attribute as shown in the figure

Question

Doesn’t it matter if you just fill in that position?

Answer 1

The return value of the modified method will be assigned to test1. Your way of writing (an assignment operation) will return true

Answer 2

Assumption User有mobile. Pseudocode:

class User extends Model
{
    public function getHiddenMobileAttribute($value)
    {
        return Str::substr($this->mobile,0,4).str_repeat('*',8);
    }
}
echo $user->hidden_mobile;
// 156********