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Best way to Integrate a Javascript result with PHP

Answer 1

A:

I would recommend taking a look at this part of the Google Maps API.

Valera 2010-08-31 19:40:48

Thanks - but seemingly irrelevant. Ive coded the script with the API, and it works. My question is about passing JS results to PHP.

Thomas Clowes 2010-08-31 20:40:30

In that case, you could write some AJAX code to communicate the results back to the server, or redirect to another (possibly the same) page with some parameters in the URL.

Valera 2010-08-31 22:32:25

Perhaps you're trying to do something like: Start PHP processing, process JS, return result(s) from JS to PHP, finish PHP processing, render the page. That will only be possible like: Do PHP processing, send page to user, process JS, use AJAX to return result to server, change page to reflect result of AJAX call.<br /><br />It would not be possible the first way...

Valera 2010-08-31 22:36:48

Answer 2

A:

Yes! I did this just the other day:

in your PHP file do this (taken straight from my code):

<?php
$numbers = array(5, 2, 10, 15);
/* Model and stuff here */
?>
<html>
    <head>
        <script type="text/javascript">
// We're going to put all the info we need here, as a JS global variable.
// If you need even more control, simply fetch it via JQuery from a PHP script that does the following.
var numbers = <?php echo json_encode($numbers); ?>

alert(numbers);
// Expected output: [5,2,10,15]
alert(numbers[2]);
// Expected output: 10
        </script>
    </head>
</html>

Cheers!

hopeseekr 2010-08-31 19:45:14

I think ive missed the point here.I am working directly with the Google Maps API. No other frameworks etc.So I make a call to the API and it returns various values.Im trying to get this value returned by JS into a php var. I.E the other way around i believe.Thanks

Thomas Clowes 2010-08-31 20:45:47

Answer 3

+1 A:

To send an answer from JavaScript to PHP requires AJAX:

If you can use JQuery, which is pretty much a standard, it's really easy. This is verbatim from one of the lessons I wrote for my PHPPro course:

receiveNumbers.php

<?php
if (isset($_GET['sentNums']))
{
    $sentNumbers = filter_input(INPUT_GET, 'sentNums', FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_HIGH);
    // Convert to array.
    $numbers = split(', ', $sentNumbers);
    // Echo out.
    echo json_encode($numbers).
}

index.php

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> 
    <head>
        <title>Graph Sort | PHPExperts.pro</title>
        <script type="text/javascript" src="js/jquery-1.4.2.min.js"></script>
        <script type="text/javascript" src="js/jquery.json-2.2.min.js"></script>
        <script type="text/javascript">
var myNumbers = '5, 10, 22, 11';
var receivedNumbers;

<?php
// Send data from JavaScript -> PHP.
if (!isset($_GET['myData']))
{
?>
    jQuery.getJSON('receiveNumbers.php?sentNums=' + myNumbers, function(jsonReceived)
    {
        receivedNumbers = jQuery.parseJSON(jsonReceived);
        alert(receivedNumbers); // Expected [5,10,22,11]
    });
<?php
}
?>
       </script>
   </head>
</html>

hopeseekr 2010-09-01 10:21:45

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Best way to Integrate a Javascript result with PHP

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