Signature

$form = apply_filters( 'mam_wc_ride_share_request_form_data', array $form );

Return the (modified) form array.

When it fires

While building the rider home screen, after the ride request form (option mam_wc_ride_share_ride_share) has been loaded and immediately before it is appended to the global app form array that backs the “Order Ride” button. It runs on every home-screen build for riders without an active ride, so the current user is available via mam_user_id().

It does not fire for the manager “Assign” flow — that flow builds its own copy of the form (pre-seeded driver id, credit-card field excluded).

Example — prefill and trim the form

add_filter( 'mam_wc_ride_share_request_form_data', function ( $form ) {

    // Prefill the pickup address street with the user's billing street.
    $street_field_id = get_option( 'my_pickup_street_field_id' );
    if ( $street_field_id && isset( $form['fields'] ) ) {
        foreach ( $form['fields'] as $i => $field ) {
            if ( $field['id'] == $street_field_id ) {
                $form['fields'][ $i ]['value'] = get_user_meta( mam_user_id(), 'billing_address_1', true );
            }
        }
    }

    // Hide a field from the app without editing the Gravity Form.
    $form['custom_form_excluded_fields'][] = get_option( 'my_internal_field_id' );

    return $form;
} );

Notes

• To change which fields exist in the mapping itself (add slugs the settings screen can map), use the mam_wc_ride_share_fields filter instead — it filters the field-mapping catalog, not the runtime payload.
• The submission lands in book_ride() via mam_form_manager_form_submitted_{form_id}; values you prefill arrive there like user-entered ones.

Related articles

• Plugin: mam-woocommerce-ride-share
• Recipe: Set up a ride-share service

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