Help Fix My Code - MySql/PHP/JSON/JavaScript d3 Charting Library

Hi - I have a mysql database with 10 years of stock data. I am trying to output the data into json and make a chart using the d3 charting library. ([login to view URL]). I am trying to make this chart ([login to view URL]). I want the user to enter a stock symbol and draw this chart ([login to view URL]). Since I am trying to learn, I just have 5 stocks in my database. I have an example of code to read the database and output into json, but I am lost. I am trying to learn how to code this, but I am lost and don't have time right now to figure it out. This is a one or two hour project for someone who knows mysql, php, json and javascript. See PDF for example.