How to assign the javascript variable value to php variable

Question

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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, Apr 18 '12 at 11:00
`message` is a javascript variable containing some value. I want to assign this value in php variable.. – — Muhammad Usman, Apr 18 '12 at 11:09
It seems like you're misunderstanding. PHP runs on the server, Javascript runs on the client. — McGarnagle, Oct 04 '12 at 05:36

score 6 · Answer 1 · answered Apr 18 '12 at 10:57

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.

score 5 · Accepted Answer · edited May 23 '17 at 11:55

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 '17 at 11:55

Community

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answered Apr 18 '12 at 10:58

Armatus

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score 1 · Answer 3 · answered Apr 18 '12 at 10:59

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 '12 at 10:59

Starx

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score 0 · Answer 4 · answered Apr 18 '12 at 10:58

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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 '12 at 10:58

Iso

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How to assign the javascript variable value to php variable

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