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