Simple PHP project

Very simple project, one page with a text box and submit button, and the following variables to be saved to a mysql database firstclickonkeyboard = milliseconds to first letter typed, from the launch of the web page lastclickonkeyboard = milliseconds the the last letter typed, from the launch of the web page comment = the text that was entered submittime = milliseconds to submit pressed, from launch of the web page iteration = how many times the web page (one session) was used to send new comments...i.e. after one "submit", all other values are reset, this increments backspaces = number of times backspace was pressed