Convert the value of a Javascript variable into a PHP variable

Question

Convert the value of a Javascript variable into a PHP variable

I am feeling confused about how to pass JavaScript variables to PHP variables. Currently, I have a PHP session named example_survey and three buttons with jQuery attributes. When a button is clicked, it triggers a jQuery click event and passes the attribute value into a condition.

<?php
session_start();
if(!isset($_SESSION['loop_survey_2016'])){
  $_SESSION["example_servey"] = "0"; 
}?>

<button class="click_btn" data-status="0">btn 01 </button>
<button class="click_btn" data-status="1">btn 02 </button>
<button class="click_btn" data-status="2">btn 03 </button>

<script type="text/javascript">
$(document).ready(function(e) {
   $(".click_btn").on("click", function() {
      var status = $(this).attr("data-status");
      var session_val = '';

    if (status == '0') {
        session_val = 'empty';
    } else if(status == '1') {
        session_val = 'pending';
    } else if(status == '2'){
        session_val = 'complete';
    }

     <?php $_SESSION['example_servey'] ?> = session_val;
}); 
});
</script>

Is there a way to achieve this using pure JavaScript?

javascript php jquery

Answer 1

Answer №1

Since PHP operates on the server side and JavaScript functions on the client side, combining values between them directly is not possible. To accomplish this, utilizing jQuery and Ajax functions can facilitate the seamless transmission of data from client to server.

An illustrative example can be found at: How to Merge JavaScript and PHP or Setting Session Variable with JavaScript

Answer 2

Since PHP operates on the server side and JavaScript functions on the client side, combining values between them directly is not possible. To accomplish this, utilizing jQuery and Ajax functions can facilitate the seamless transmission of data from client to server.

An illustrative example can be found at: How to Merge JavaScript and PHP or Setting Session Variable with JavaScript

Answer 3

Answer №2

PHP and Javascript serve different purposes - PHP is a server-side language, while Javascript is a client-side language. In order to achieve the desired outcome, you will need to send information from the client to the server using a request. One of the simplest and quickest methods to do so is by submitting a form and retrieving the form parameters with PHP upon page reload.

The Javascript code would look like this:

<form action="#" method="post">
<input type="hidden" value="<script>document.write(variable)</script>" name="my_var" />
<input type="submit">
</form>


<script type="text/javascript">
$( document ).ready(function(e) {
   $( ".click_btn " ).on( "click", function() {
      var status =  $(this).attr("data-status");
      var session_val = '' ;
    if (status == '0') {
        session_val = 'empty';

    } else if(status == '1') {
        session_val = 'pending';

    }else if(status == '1'){
        session_val = 'complete';
    }
     //Remove this line 
    <?php $_SESSION['example_servey'] ?> = session_val;

        $.post( "YOUR_PHP_FILE.php", { my_var : session_val } );
      }); 
    });
    </script>

And the PHP code would be:

<?php 
$javascript_var = $_POST["my_var"];
// Now you can use $javascript_var as a PHP variable
?>

Answer 4

PHP and Javascript serve different purposes - PHP is a server-side language, while Javascript is a client-side language. In order to achieve the desired outcome, you will need to send information from the client to the server using a request. One of the simplest and quickest methods to do so is by submitting a form and retrieving the form parameters with PHP upon page reload.

The Javascript code would look like this:

<form action="#" method="post">
<input type="hidden" value="<script>document.write(variable)</script>" name="my_var" />
<input type="submit">
</form>


<script type="text/javascript">
$( document ).ready(function(e) {
   $( ".click_btn " ).on( "click", function() {
      var status =  $(this).attr("data-status");
      var session_val = '' ;
    if (status == '0') {
        session_val = 'empty';

    } else if(status == '1') {
        session_val = 'pending';

    }else if(status == '1'){
        session_val = 'complete';
    }
     //Remove this line 
    <?php $_SESSION['example_servey'] ?> = session_val;

        $.post( "YOUR_PHP_FILE.php", { my_var : session_val } );
      }); 
    });
    </script>

And the PHP code would be:

<?php 
$javascript_var = $_POST["my_var"];
// Now you can use $javascript_var as a PHP variable
?>

Convert the value of a Javascript variable into a PHP variable

Answer №1

Answer №2

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