How to update a piece of php code like query with javascript

Question

I have this piece of php code :

<?php
$food = 100;

$food  $food - 10;
?>

and I need to update it so it displays the food variable on the web page immediately without reloading the whole page

This would be the javascript code:

var food = 100;

var food = food - 10;

$("div").html(food);

Your Javascript can't touch your PHP because one runs on the client and one runs on the server. Can you clarify your question please? — master565
– master565, Commented Jun 20, 2016 at 15:49
PHP runs on the server so you need to contact the server to get it to do anything - you can't just change parts of the page on the fly unless you're using something like JavaScript/Ajax to contact the server and parse the response. — CD001
– CD001, Commented Jun 20, 2016 at 15:52

codemonkey · Accepted Answer · 2016-06-20 15:50:32Z

1

If you are wanting to set the initial variable on page load you could insert it into your JavaScript like so

var food = <?=$food?>

This will then allow you to manipulate the value without reloading the page.

answered Jun 20, 2016 at 15:50

codemonkey

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1 Comment

Still processing the data with JavaScript but yeah, if the initial data is coming from PHP this is an option.

Ben Rhys-Lewis · Accepted Answer · 2016-06-20 15:50:37Z

0

PHP is a server side language so cannot output data like you want with out refreshing. Javascript can do this because it is client side.

answered Jun 20, 2016 at 15:50

Ben Rhys-Lewis

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