Setting age restriction returns false

Question

Using the sample PHP code on this page works great for setting the restriction to {"location":"US"} however it returns false when trying to set it to {"age":18} or {"age":"18"}. Is there a special way which this needs to be formatted in order to set an age restriction?

See the list of available restrictions here.

Thank you.

Answer 1

Instead of using {"age":"18"}, use {"age_distribution":"18+"}.

I don't know why using "age" doesn't work. The documentation says it should work, but it didn't work for me either.

However, using age_distribution does work.