的PHP：如果属性不存在

Question

I just encountered a problem which is new to me and I found 2 solutions... this question is basically about finding a better or cleaner one if there is !

In my DB, I store some preferences for every user about his daily schedule. The first time the user connects, the DB doesn't have any infos so I'm running this code:

if(!empty($opening_h->{'lunch'}) == true) 
{ 
    if($opening_h->{'lunch'} == 1) 
    {
        echo 'checked';
    };
};

PS: there are multiple values in there, encoded in json format.

Is there a better way? The other one I could think about would be to write

lunch => 0, dinner => 0

when the user registers to the platform... but that seems silly.

Thanks for your help!

Answer 1

I would recommend using __isset magic method in your class for $opening_h to check whether the property exists first and to do something if not. Then, when you're sure your property exists, you can easily write something like:

if($opening_h->{'lunch'} == 1) {
    echo 'checked';
};

With the __isset now it looks simpler.