How to add a javascript variable in PHP?

Question

I want to catch the variável of vetor that I believe in the JS and store its contents in one of the PHP.

<?php
       print("<SCRIPT language=javascript>  
              vetor_dados[$cont] ="text";
       </SCRIPT>"); 
$conteudo = vetor_dados;
?>

As I should?

Obs: The way to use the, ex:

<script type="text/javascript">
var x = 'valor';
</script>
<?php
    $x = "<script>document.write(x)</script>";
    echo $x;
?>

Causes the $x show <script>document.write(x)</script> and not the content of JS;

Image of how it appears as above:

Answer 1

It is not possible like this. You need to understand the concept: HTML and JS are language client which means their execution is done on your computer. PHP is a server language, which means the PHP "engine" is on the server, not on your computer.

From a chronological point of view, the browser requests the page, the PHP engine parses the request and generates the code and sends it back to the browser, then PHP is terminated. The page travels through the internet, arrives at the user’s computer and from this moment the browser renders the received HTML and executes Javascript.

It means that the

 <?php $conteudo = vector_dados ?>

runs on the server, and the rest (HTML, CSS and JS) runs, AFTER, on the user’s machine.

To recover Javascript data with PHP, you need to re-upload the data to the server.

Answer 2

You’ll have to do it this way:

<SCRIPT language=javascript>  
    var vetor_dados ="text";
</SCRIPT>

<?php
    $conteudo = "<script>document.write(vetor_dados)</script>";

    echo $conteudo;
?>