How to assign the javascript variable value to php variable [duplicate]

Question

Possible Duplicate:
How to pass JavaScript variables to PHP?

I want to assign the javascript variable to php variable

$msg = "<script>document.write(message)</script>";
$f = new FacebookPost;
$f->message  = $msg;

But it is not working......

I believe if you explain the situation a little more we can surely help. — foxybagga
– foxybagga, Commented Apr 18, 2012 at 11:00
message is a javascript variable containing some value. I want to assign this value in php variable.. – — Muhammad Usman
– Muhammad Usman, Commented Apr 18, 2012 at 11:09
It seems like you're misunderstanding. PHP runs on the server, Javascript runs on the client. — McGarnagle
– McGarnagle, Commented Oct 4, 2012 at 5:36

Simon Forsberg · Accepted Answer · 2012-04-18 10:57:47Z

6

PHP is executed before javascript. You can't do that. PHP is server based, JavaScript is client based.

When PHP is finished executing, it outputs HTML. In the HTML there can be JavaScript code also. So PHP can 'control' JavaScript by outputting JavaScript code to the page, but not the other way around. You'd have to use Ajax-call for that.

answered Apr 18, 2012 at 10:57

Simon Forsberg

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Community · Accepted Answer · 2017-05-23 11:55:15Z

5

Javascript works on the user's computer, PHP works on your server. In order to send variables from JS to PHP and vice versa, you need communication such as a page load.

Have a look here on what you can do: How to pass JavaScript variables to PHP? or more specifically the first answer (https://stackoverflow.com/a/1917626/1311593)

edited May 23, 2017 at 11:55

CommunityBot

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answered Apr 18, 2012 at 10:58

Armatus

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Starx · Accepted Answer · 2012-04-18 10:59:37Z

1

Javascript, is a client side script, Where as PHP is a server side script.

The only way you can send data to PHP is through redirection or ajax.

answered Apr 18, 2012 at 10:59

Starx

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Iso · Accepted Answer · 2012-04-18 10:58:51Z

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You cannot do that this way. You have to transmit values via $_GET, $_POST or $_COOKIE, after the script has been executed by client.

answered Apr 18, 2012 at 10:58

Iso

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