Send Yos from your PHP app with 2 lines of code.
<?php
// Add file
require('yo.php');
// Get an API Key at dev.justyo.co
$apiKey = 'YOUR_API_KEY';
// Instanciate
$yo = new Yo($apiKey);
// Send a Yo to all your subscribers
$yo->all();
// Send a Yo to one user
$yo->user('USERNAME');
// Get number of subscribers
$count = $yo->subscribers(); // returns an int or false
?>