Filemaker PHP - Add record

<?php

include ("/www/fmphp/access.php");
        
        //'respondent_exists' will be set if the user is coming from the Respondent.php page

           
           //Grab the user input from the $_POST data
            $respondent_data = array(
                'firstname'        => $_POST['firstname'],
                'lastname'         => $_POST['lastname'],
                'email'     => $_POST['email']
            );
    
    
    
            //Validate the user input. 
    
            if (        empty($respondent_data['firstname'])
                    ||  empty($respondent_data['lastname'])
                    ||  empty($respondent_data['email'])
                ) {
                
                //If data is missing, prompt them with a message.
                echo '<h3>Some of your information is missing. Please go back and fill out all of the fields.</h3>';
            
            } else {
                
                //If user input is valid, add the first name, last name and the email address in the Respondent layout
                $newRequest =& $fm->newAddCommand('Layout #1', $respondent_data);
                $result = $newRequest->execute();
                
                //check for an error
                if (FileMaker::isError($result)) {
                    
                    echo "<p>Error: " . $result->getMessage() . "<p>";
                    exit;
                }
                
                //Display a success/thank you message
                echo '<p>Thank you for your information.</p>';
            }
        
    ?>