PHP Designing Interfaces in PHP Introducing Interfaces Implementing an Interface

Mikkel Rasmussen
Mikkel Rasmussen
30,753 Points

Check this if json_decode returns null

If json_decode returns null is it because the database.json is not valid.

You can fix this by open the database.json file and search for "Washington University: Seattle, WA" and remove the comma at the end.

Simon Coates
Simon Coates
28,648 Points

I ran it through a validator and got the same result. If this is a bug you should probably report it to Alena Holligan .

Alena Holligan
Alena Holligan
Treehouse Teacher

Yes, "NULL is returned if the json cannot be decoded or if the encoded data is deeper than the recursion limit."

http://php.net/manual/en/function.json-decode.php

I believe I had fixed the database.json file extra comma. When and from which video did you first launch your workspace?

Mikkel Rasmussen
Mikkel Rasmussen
30,753 Points

I downloaded the project files from the first video and re downloaded them again in this video to see if there was any difference but I got the same error.

1 Answer

Alena Holligan
STAFF
Alena Holligan
Treehouse Teacher

I hadn't updated the downloads yet. Those are now updated so no one should be getting that error anymore.

However, just for reference, "NULL is returned if the json cannot be decoded or if the encoded data is deeper than the recursion limit."

http://php.net/manual/en/function.json-decode.php