rand function problem

[Anon]

Hi there, I am a PHP beginner. I'm trying to use the rand function to select a number between 1 and 100 (for a number guessing game). I want it to stay at the first number that was randomly selected, instead of generating a new number everytime I submit the form. Can anyone help me?

[Anon]

Run the rand code within a check for the submit value

IF (!$submit){
//form submitted
}else{
//do rand code
}