Passing JavaScript value into PHP

Question

I have a form, when the user fill the location, it will show the map route and route distance. I want to pass the distance into my PHP variable but I don't know how to do it. Can we pass the JS variable value into JSON and extract it into a PHP variable? If can help me or if there is alternative method(s) please tell me.

Pass the variable into a hidden input element and send across with the post data. — Joshua Terrill, Aug 22 '15 at 09:00
use ajax to send POST or GET request to a backend php script which can then read that request and process accordingly — Professor Abronsius, Aug 22 '15 at 09:00
i use window.location.href to pass js variable into php and it works but another problem is . the web page reload continously. — ascc, Aug 22 '15 at 09:24

score -1 · Answer 1 · edited Aug 22 '15 at 10:11

<script>
jQuery.ajax({
     url:"ajax.php",
     type:"POST",
     data:{distance:distance},
     success:function(data){
        if(data){
            then do something
        }
     }
});
</script>

In ajax.php you can get it as below.

<?php
    $distance = $_REQUEST['distance'];
?>

If you array of values you can do as below.

<script>
dataArray[] = {1000,2000,3000}
var jsonString = JSON.stringify(dataArray);
jQuery.ajax({
     url:"ajax.php",
     type:"POST",
     data:{distance:jsonString},
     success:function(data){
        if(data){
            then do something
        }
     }
});
</script>

In ajax.php you can easily get the request data.

<?php
    $distance = $_REQUEST['distance'];
    foreach($distance as $dist){


    }
?>

This is a badly formatted mess that is full of syntax errors and bad practises. The question isn't tagged jQuery either. — Quentin, Aug 22 '15 at 09:44

Passing JavaScript value into PHP

1 Answers1