How to use jQuery to make an input's changing value a php variable?

Question

Is it possible using jQuery, or any other language, to make an input's value a php variable without saving or refreshing the page?

I am trying to build a simple math form that has one constant and one variable. I need the calculated value to be displayed similar to the Live Preview with jQuery script.

<input type="text" name="word" value="<?php $second_number ?>" />
<?php 
$first_number = 10;
$sum_total = $first_number + $second_number;
print ($sum_total); ?>

Live Preview with jQuery snippet, for reference:

<script type="text/javascript">
$(function() 
{
$(".word").keyup(function() 
{
var word=$(this).val();
$(".word_preview").html(word);
return false;
});
});
</script>

Lightness Races in Orbit · Accepted Answer · 2011-07-02 13:37:53Z

1

No, it's not.

PHP is a pre-processor: its output is the HTML and Javascript that runs on your web browser. The PHP logic has long gone by the time it reaches the browser.

If you want to provide data to a PHP script and get data back out of it (for use on the web), you must do this through an HTTP request.

Make it an inline one (XmlHttpRequest or "AJAX") if you wish.

answered Jul 2, 2011 at 13:37

Lightness Races in Orbit

387k77 gold badges671 silver badges1.1k bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

MTT Over a year ago

Thanks! I'll redirect my search for a jQuery math plugin and also look into an AJAX request...

Collectives™ on Stack Overflow

How to use jQuery to make an input's changing value a php variable?

1 Answer 1

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related