How can I get live input box field value by Ajax in same page to assign a php veriable

Question

I would like to assign input box field value as a php variable in a same page when any keypress/keyup event is happen. The input box is as following,

<input type="search" id="searchbox" class="inputbox-findtag" name="keyword" placeholder="Search tag...">

I would like to assign the input box field value with live(i.e, on keyup/keypress/...) as a php variable in a same page that is look like,

$field_value = [input box value]

To do this I have already used jQuery-Ajax that is look like below,

$("#searchbox").on('keyup',function () {
    var key = $(this).val();

    $.ajax({
        url:'fetch.php',
        type:'GET',
        data:'keyword='+key,

        success:function (data) {
          $("#rsql").html(data);
        }
    });

});

And the fetch.php file is below,

 if($_GET['keyword'] && !empty($_GET['keyword']))
 {
      $keyword = $_GET['keyword'];
      echo $keyword;
 }

I have already got the input box value by keyup. But how can I assign this value as a php variable $field_value that I have declared previous.

If you have any other idea to get live input box field value in same page to assign a php variable then you can share it.

By assigning the value of textbox to Php variable what you want to do ? — Mayank Pandeyz, Feb 24 '17 at 06:12
By the way you can not do that kind of stuff. You can make JS variable from PHP variable, but you can not assign PHP variable from JS variable. — Ankit Vadi, Feb 24 '17 at 06:13
try ajax. but do you want to assign the input value on each keypress? — Salman, Feb 24 '17 at 06:16
http://stackoverflow.com/a/36026695/4248328 And http://stackoverflow.com/a/36026828/4248328 — Alive to die - Anant, Feb 24 '17 at 06:16

score 0 · Answer 1 · edited May 23 '17 at 11:46

As Per Assign jquery value to php variable

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;
?>

How can I get live input box field value by Ajax in same page to assign a php veriable

1 Answers1