How to add up value via function - PHP - php

Question

I am trying to create a function that add up number to a given variable each time a button was click.
I have 4 buttons: farm, cave, house, casino
So what I am trying to achieve here is I need to send the random numbers generated by the buttons to a variable that will add up all of the SCORE on the "YOUR GOLD" section. So let's say I click the farm and the cave button so there will be 20 for the cave and 15 for farm for a total of 35 gold already.
Here's my form.php
<div class="wrapper">
<div id="gold">
<form action="process-game.php" method="post" >
YOUR GOLD: <input type="hidden" name="building" value="gold"/>
</form>
</div>
<div class="farm_form">
<h2>Farm</h2>
<form action="process-game.php" method="post" >
<input type="hidden" name="building" value="farm"/>
<input type="submit" value="Find Gold!"/>
</form>
</div>
<div class="farm_form">
<h2>Cave</h2>
<form action="process-game.php" method="post">
<input type="hidden" name="building" value="cave"/>
<input type="submit" value="Find Gold!"/>
</form>
</div>
<div class="farm_form">
<h2>House</h2>
<form action="process-game.php" method="post">
<input type="hidden" name="building" value="house"/>
<input type="submit" value="Find Gold!"/>
</form>
</div>
<div class="farm_form">
<h2>Casino</h2>
<form action="process-game.php" method="post">
<input type="hidden" name="building" value="casino"/>
<input type="submit" value="Find Gold!"/>
</form>
</div>
</div>
Here's my process.php:
<?php
session_start();
if(isset($_POST['building'])){
echo earn_gold();
}
function earn_gold(){
if($_POST['building'] == "farm"){
$gold = rand(10,20);
}else if($_POST['building'] == "cave"){
$gold = rand(5,10);
}else if($_POST['building'] == "house"){
$gold = rand(2,5);
}else if($_POST['building'] == "casino"){
$gold = rand(0,50);
}
return $gold;
}
?>
Any idea how to do this?

Answer 1

I know, you basically wanted a solution in PHP. Still, I could not resist showing you, how easy it would be doing the same in JavaScript/jQuery. Have a look at it or simply ignore it. It is up to you ... ;-)
// define gold amounts for each button (min,max):
var finds={farm:[10,20],cave:[5,10],house:[2,5],casino:[0,50]};
$(function(){
$(':submit').click(function(){ // for all submit buttons: bind the click event to a function ...
var place=$(this).closest('div[id]').attr('id'); // get the id of the buttin's parent div
var fnd=finds[place]; // get the min/max array for the current button
with ($('#gold span')) // locate and use the <span> inside the div with id=gold
text(parseFloat(text()) // get the current value of the span (convert to float)
+fnd[0]+Math.ceil(Math.random()*(fnd[1]-fnd[0]))); // add the gold ...
});
})
div {display:inline-block; width: 120px; border:1px solid grey}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div class="farm_form" id="gold">
<h2>Your Gold</h2><span>0</span>
</div><br>
<div class="farm_form" id="farm">
<h2>Farm</h2><input type="submit" value="Find Gold!"/>
</div>
<div class="farm_form" id="cave">
<h2>Cave</h2><input type="submit" value="Find Gold!"/>
</div>
<div class="farm_form" id="house">
<h2>House</h2><input type="submit" value="Find Gold!"/>
</div>
<div class="farm_form" id="casino">
<h2>Casino</h2><input type="submit" value="Find Gold!"/>
</div>

Answer 2

If you really need it, I guess you can do it with sessions.
if (isset($_POST['building'])) {
// getting random gold
$earn_gold = earn_gold();
// adding to session called "gold"
$_SESSION['gold'] = (isset($_SESSION['gold']) ? $_SESSION['gold'] + $earn_gold : $earn_gold);
// redirect back to process page
header('Location: process.php');
exit;
}
And then outputting it like so
<div id="gold">
<form method="post" >
YOUR GOLD: <input type="hidden" name="building" value="gold"/>
<?php
// if set, outputting sessions "gold" value
if (isset($_SESSION['gold'])) echo $_SESSION['gold'];
?>
</form>
</div>

Answer 3

When the user click on find gold then submit a form which will add the gold to the total result. For example if the user gets 3 gold then add the gold variable.
$totalGold = 0;
when user.click button then $totalgold +3;

Answer 4

Have one form element and use javascript to assign onclick events to each of the butons and may be use ajax to submit the form dynamically and display the results back on same page.