如何通过单击更改数组值？

I've seen references to Ajax for this, but I'm not entirely sure how I could integrate that with the arrays and still have a functioning system. I want to change the value of $place and $title each time a user presses the button, and I know that I'll need an if statement and some way of processing a form (no clicks in PHP), but I don't know anything else beyond that. I've pasted my PHP and the HTML button below:I've seen references to Ajax for this, but I'm