CODEWITHSUNDEEP
javascriptphphtml
user3180745
user3180745

Reputation: 31

How to store the value of a javascript variable into php variable?

I need to pass a value from javascript to php. How can i achieve this since one runs on client side and other on server? or any other alternatives for this to happen? I am a newbie in programming, so correct and suggest me if i am wrong.

<html> 
    <head>
       <SCRIPT language="JavaScript"> 

          var q1=Math.floor(Math.random()*11) 
          <?php 
             $ff =  q1; 
          ?>
       </SCRIPT> 

    </head> 

    <body> 
       <?php 
          echo $ff ; 
       ?> 
    </body> 
</html>

Upvotes: 0

Views: 32763

Answers (5)

Chetan Ghadiya
Chetan Ghadiya

Reputation: 368

you can use like this.

<html> 
    <head>
      <script type="text/javascript">
          var q1="hello"; 

          <?php 
             $ff ="<script>document.write(q1)</script>";             
          ?>
       </script>
   </head>
<body>
<?php echo $ff; ?>
 </body> 
</html>

Upvotes: 1

samuel
samuel

Reputation: 63

you can use like this.

<html> 
    <head>
      <script type="text/javascript">
          var q1="hello"; 

          <?php 
             $ff ="<script>document.write(q1)</script>";             
          ?>
       </script>
   </head>
<body>
<?php echo $ff; ?>
 </body> 
</html>

Upvotes: 0

Girish
Girish

Reputation: 12127

PHP is server side language, that is used to render output in HTML, so you can assign PHP variable in JavaScript variable not JavaScript to php, you can send JavaScript variable to Server by AJAX

Try this way

<SCRIPT language="JavaScript"> 
var q1=Math.floor(Math.random()*11) 
function sendAJAX(q1)
{
var xmlhttp;
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
         alert('posted value' + xmlhttp.responseText);
    }
  }
xmlhttp.open("GET","http://yourdomain.com/?q=" + q1 ,true);
xmlhttp.send();
}
</SCRIPT>

And in PHP code

<?php 
$ff = $_GET['q'];
echo $ff;
?>

Upvotes: 2

manta
manta

Reputation: 1688

The HTML file: 

<script src='http://code.jquery.com/jquery-1.10.2.min.js'></script>
<script>
var q1=Math.floor(Math.random()*11);
$(document).ready(function(){
    $.ajax({url:"ajax.php",data: {"q1":q1}}).done(function(data){console.log(data)});
});
</script>

The PHP file: ajax.php

<?php
$ff = filter_input(INPUT_GET, 'q1', FILTER_VALIDATE_INT);
echo $ff;
?>

References:

jquery

PHP

Upvotes: 1

Dev01
Dev01

Reputation: 4222

It is not possible since PHP code (server-side) is run/parsed before javascript code (client side). So what you are doing is not possible although reverse is possible. You can also use:

  • Ajax
  • Hidden form field
  • Query string variable (via url)

To send javascipt variable value to php.

Upvotes: 3

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