What does this (highlighted in bold) stand for in getJSON
$.getJSON('http://www.example.com/test.php?**callback=?**',...)
The =? in callback=?
is what got me confused, because I thought it basically meant "go to the url provided and find the instances where a callback is issued".
The reason why I'm asking is what happens if I do this:
$.getJSON('http://www.example.com/test.php?**callback=hey**',...)
Does it look for a function in the test.php that is called hey with a jsonp callback or does the result of the callback got to a function in the script called hey?
I'm kind of lost.