Assign jquery value to php variable

Question

In same page i set the jquery value while click the button. i want pass the value to php variable in same page without form submitting.

<input type="button" name="next"  class="next btn btn-primary" value="Proceed To Checkout Page" />

Jquery

$(".next").click(function(){
       <?php $var1="1";?>
 }

While check the php value

<?php if(isset($var1)){
     echo $var1;
 }else{
    echo "NULL";
   }?>

Every time time i got the null value. Where i getting mistake. Ps: I cant able to send the ajax call to get the value

Answer 1

You simply cannot do that, you need to understand the difference between client/server side programming, you cannot assign Javascript value to PHP variable, yea but you can assign PHP value to your javascript.

You can use cookies to achieve this.

In Javascript:

<script type="text/javascript">
    document.cookie = "var1=1";
</script>

And in PHP

<?php 
   $phpVar =  $_COOKIE['var1'];
   echo $phpVar;
?>