Modify user profile data through scripting?

Question

You should allow for a custom field in your unity profile which will be linked to the WordPress profile. You could then run a JavaScript function to call an AJAX script to execute a PHP file inside WordPress to update a specific profile.

Here’s some pseudo-code:

JavaScript

function updateProfile(parameters) {
    var xhttp = new XMLHttpRequest();

    xhttp.open('GET', 'https://www.example.com/receiver.php' + parameters, true);
    xhttp.send();
}

// Usage
updateProfile('?username=whatever&points=4');

PHP (receiver.php):

<?php
global $wpdb;

$username = $_POST['username'];
$points = (int) $_POST['points'];

$wpdb->query("UPDATE some_table SET points = points + $points WHERE username = $username");

Note you’ll need to sanitise your input and you’ll neet to link the pints to the username. You can add add_user_meta() function for this.

Note that this is a basic approach. The receiver.php file can be part of a plugin, so you’ll actually call example.com/wp-content/plugins/unity-plugin/receiver.php in your AJAX call.