<?php
$random=rand(1,10);
echo $random;
?>

rand($levelofuser1,$skillpointsofuser1) * 3

rand($levelofuser2,$skillpointsofuser2)* 3

//form.php
<?php
$rand=rand(1,10);
//that randomizes the number from 1 to 10..afcourse,,you can always change it to 1-100 or 20 -22..etc

if ($_POST['randnumber'] = $rand) {
echo "<font color='green'><b>Correctly Guessed!</b></font>";
}
else {
echo "Guess Again! The correct answer was ".$rand."";
}
?>


<form action='#' method='post'>
Guess a random number from one to ten :<br>
<input type='text' name='randnumber'><br>
<input type='submit' value='submit number' name='rbutton'>
</form>