gistfile1.txt

add_filter( 'propertyhive_reapit_foundations_enquiry_body', 'split_name_in_reapit_enquiry', 10, 1 );
function split_name_in_reapit_enquiry($body)
{
    if ( isset($_POST['first_name']) && !empty($_POST['first_name']) )
    {
        $body['forename'] = sanitize_text_field($_POST['first_name']);
    }
    
    if ( isset($_POST['last_name']) && !empty($_POST['last_name']) )
    {
        $body['surname'] = sanitize_text_field($_POST['last_name']);
    }
    
    return $body;
}