CODEWITHSUNDEEP
phpjavascript
Hai Truong IT
Hai Truong IT

Reputation: 4187

How to get value from php javascript?

I have a file php javascript

in news.js

news_id  = 1;
document.write('<div id="news-id"></div>');
function output(strHtml) {
    document.getElementById('news-id').innerHTML = strHtml;
}

in news.php is using

<?php
    $news_id = 
?>
news_id
<?php
    $str = '<p>This is id: </p>'.$news_id;
?>    
output(<?php echo json_encode($str); ?>);

And index.html i call

<script src="news.js" type="text/javascript"></script>
<script src="news.php" type="text/javascript"></script>

When i run index.html is error, how to get news_id from js to using in php

Upvotes: 1

Views: 3597

Answers (3)

Steve
Steve

Reputation: 8640

Well, as wrong as the original question is, there is a way to get the a JS variable into a PHP file.

In the HTML:

<script src="news.js"></script>
<script>
    document.write('<scr'+'ipt type="text/javascript" src="news.php?myvar='+myvar+'" ></scr'+'ipt>');
</script>

In news.js:

var myvar = "HELLO";

In news.php:

alert("<?php echo $_GET["myvar"]?>");

Again, I highly discourage this approach... but it works.

Upvotes: 1

aifarfa
aifarfa

Reputation: 3939

To use PHP as javascript source <script src="news.php"

you need explicit declare content-type in .php

<?php header("Content-type: text/javascript"); //at very first line no white-space before ?>
//this is javascript content..

Important!

first, PHP execute on web server and send response to client(browser).

then javascript execute later in web browser.

To use js value inside php function you need AJAX GET/POST.

Upvotes: 0

bassem ala
bassem ala

Reputation: 191

You can't call news.php like this. It should be included in the html file like this:

include("news.php");

and you should change the extension of your html file to .php

Upvotes: 1

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