Sample PHP to Retrieve License Key from LicenseEngine

$url = 'http://www.licenseengine.com/api/v1/retrieve/product_id/email@sample.com';
$username = 'YOUR_LICENSEENGINE_USERNAME';
$password = 'YOUR_LICENSEENGINE_PASSWORD';

$ch = curl_init();
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
curl_setopt($ch,CURLOPT_USERPWD,"$username:$password");
curl_setopt($ch,CURLOPT_HTTPAUTH,CURLAUTH_BASIC);
$output = curl_exec($ch);
$info = curl_getinfo($ch);
curl_close($ch);


print_r($output);