Undefined index: Error in ajax POST and/or php script?

Question

I\'m trying to send an ajax POST to a php file, however the php file sends a notice of \"undefined index\", and the php file never seems to receive the value i\'m trying to

Answer 1

The problem can come from the dataType not being specified or that the dataType specified does not match thus returned by the server.

Explicitely set the dataType, e.g. dataType:'json'

and make sure that your script returns data that is "encoded" in the data type that you chose, e.g. in PHP:

echo json_encode($something);