Write som2 small fixes - 1 php 1 ajax call

I have a form where someone enters a search term. If no results are found, a button displays that says "suggest it". If someone clicks that button, I want the word they entered to be written to a text file. I have written the code, but nothing is being written. I want you to tell me why. Also, once they click the suggest it button, I want a message to display under the button that says "thanks...." I wrote that but it's not working. I want you to tell me why. All data is in attached php file. Specifically, look at lines 7-14, 56-59, 63-68, and 121-136.