I have created a PHP web page that allows me to control a serial device (a speaker selector matrix), and an Arduino (to switch an amplifier off and on) over my network. I am trying to make it so the text color changes on what ever button is pressed. The button presses are stored as a variable and then POSTed. I would like the text on the current button selected to turn red. There are 5 separate sets of buttons, so each set could have a button with red text at any time. Eventually, I would like to have a graphic next to the button which would change based on a button press. (baby steps!)
Attached is the web page. Please keep any answers in laymans terms, since I am a real PHP noob! This webpage is the result of A LOT of trial and error, but it works! Any suggestions are welcome!
audio.php