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