Comment form connection to Gravity Forms

This is possible using the comment_post action, and the GFAPI class which handles entries in WordPress.

What you need to first is add using comment_form_default_fields a field which is a checkbox.

function add_to_email_list_field($fields) {

    $fields['add-to-email'] = '<p class="comment-form-public">
    <input id="addtoemail" name="addtoemail" type="checkbox" />
    <label for="addtoemail">
    Check this box to add yourself to our email list.
    </label></p>';
    return $fields;
}
add_filter('comment_form_default_fields','add_to_email_list_field');

This adds to the comment form (before the actual comment box) a checkbox. If it’s checked, we need to add an entry object to Gravity Forms. This form assumes that the first field is the name, and the second field is email, and the form ID is 1. This will need changing on your site:-

function save_to_gravity_form( $post_id ) {
     $save_meta_checkbox = esc_attr( $_POST['addtoemail'] );

    if ( $save_meta_checkbox == 'on' ) {
        $entry = array( 'form_id' => 1, // Change form ID to your Gravity Form ID
            1 => esc_attr( $_POST['name'] ), // Change 1 to the field ID in your Gravity Form for Name 
            2 => esc_attr( $_POST['email'] // Change 2 to the field ID in your Gravity Form for Email )
        );
        $entry_id = GFAPI::add_entry($entry);

        if ( is_wp_error( $entry_id ) ) {
            wp_die( $entry_id->get_error_message() );
        }
    }

}
add_action( 'comment_post', 'save_to_gravity_form', 1 );

That is very quick, so hopefully that works for you 🙂

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