<form>
            email: <input type="text" name="email" value="<?php 
if (isset($_REQUEST['email'])) {
    echo htmlspecialchars($_REQUEST['email']);
}
?>
"><br/>
            reason: <input type="text" name="reason" value="<?php 
if (isset($_REQUEST['reason'])) {
    echo htmlspecialchars($_REQUEST['reason']);
}
?>
"><br/>
    <input type="submit">
<input type="hidden" name="go">
</form>
<?php 
include '../infusionsoft.php';
include 'testUtils.php';
if (isset($_REQUEST['go'])) {
    $out = Infusionsoft_APIEmailService::optOut($_REQUEST['email'], $_REQUEST['reason']);
    var_dump($out);
}