How to submit a form to its self on sololearn?

Question

I am try to get a user input and post it to the screen. Here is my code.

<script>
function validateForm() {
var x = document.forms["NumInput"]["number"].value;
if (isNaN(x) || x < 1 || x > 5) {
alert("Please Enter A Number Between 1 And 5!");
return false;
}
}
</script>
<?php
$CompNum = rand( 1,5);
$UserNum = $_POST['number'];
?>
<?php
echo"Hello,", "<br/> " ,"Can you Guess the number your computer is thinking?","<br>"," Pick a number 1 - 5.";
?>
<form name="NumInput" action='#' onsubmit="return validateForm()" method='post'>Enter Your Number:<input type='text' name='number'><input type="submit" value="Submit">
<br/>
<?php

echo "<br/>Your Number Is: " , $UserNum;
if($UserNum == $CompNum){
echo"<br/><br/>You Win! Nice Job!";
echo"<br/>Your Computer's Number Is:" , $CompNum;
}else{
echo"<br/><br/>Better Luck Next Time!";
echo"<br/>Your Computer's Number Is:" , $CompNum;
}
?>

any suggestions on how to do this if it is even possible on Sololearn.
Thanks Everyone!

Answer 1

Code submitted to SoloLearn runs approximately 10s, once. There is no official saved state: You get 1 run, 1 output, and then everything this server knows about you app vanishes...so no form POSTing (no URL to use in any case).

You could:
1. Submit separate code simulating a POST processor (same app + different input modes or separate apps)
2. Get a CodeAnywhere, AWS or Heroku box
3. Set up your own server (easier?: search for WAMP/LAMP premade virtual machines or dockers)
4. Try various Android apps (Termux, Android Servers Ultimate, PHP Server, ...)

Otherwise the best approaches I've seen to interactivity include:
1. Python: Embedded steps (Ahri Fox): feeding the next choices to users as subsequent inputs for each run. You'd have to write your PHP this way (mode 1, mode 2, ...)
2. Web: Offloaded state (like Burey's games/apps).
3. I have ideas, but I'm being careful. I'll post if something's good.

By the way: you can 'return false;' as part of onsubmit() to cancel the actual POST (stay in the app) while still processing code:

onsubmit="doStuff(); return false;"