Simple Launchrock API class

launchrock_api.php

<?php
/**
 * Simple class for the Launchrock API, see http://support.launchrock.com/customer/portal/articles/74480-using-the-api for more information
 */

class LaunchRockApi {

    var $apiKey = '';       # Your API key, get it from Launchrock.com
    var $urlPrefix = '';    # Your referral url, minus the actual referral id, e.g. 'example.com/?refid='
    var $lrDomain = '';     # The domain of your site as you registered it at Launchrock, e.g. 'example.com'

    public function submit($email, $referralid = '') {
        $values = array(
            'email'      => $email,
            'referralid' => $referralid,
            'lrDomain'   => $this->lrDomain,
            'urlPrefix'  => $this->urlPrefix,
            'apiKey'     => $this->apiKey,
        );
        $postString = $this->buildPostString($values);

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, 'http://208.72.154.212/widgetapi.0.2.php'); 
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        curl_setopt($ch, CURLOPT_POST, count($values));
        curl_setopt($ch, CURLOPT_POSTFIELDS, $postString);
        $data = curl_exec($ch);
        
        # Launchrock returns json surrounded by parentheses and some whitespace, 
        # so we have to trim those out to keep valid json
        $data = trim(trim($data), '()');
        
        return json_decode($data);
    }
    
    private function buildPostString($values) {
        $postString = '';
        foreach($values as $key => $value) {
            $postString .= $key . '=' . urlencode($value) . '&';
        }
        return trim($postString, '&');
    }

}

# Example usage
$launchRockApi = new LaunchRockApi();
$response = $launchRockApi->submit('[email protected]', 'abc1234');

var_dump($response);

?>