Introduction #

WP Travel Engine – Developer documentation is a complete guide for theme and plugin developers willing to develop themes or willing to customize and modify functionalities or templates provided by WP Travel Engine plugin. The developer documentation handbook will be a guideline for developing custom travel themes powered by WP Travel Engine.

Developer Notes #

• The documentation categorized into mainly two sections based on the type of hooks available for customization in WP Travel Engine, action, and filter hooks. All of the customization and changes are to be accessed using these WordPress hooks. An action hook takes the info it receives, does something with it, and returns nothing. In other words: it acts on something and then exits, returning nothing back to the calling hook and a filter is used to modify something in a specific way so that the modification is then used by code later on. Learn more about actions and filters here.
• All of the codes and examples in this documentation is intended too either be written inside compatible themes, child themes ( for customizations ), or in custom plugins. No code should be modified or added/edited in the WP Travel Engine core plugin itself as the changes will be lost upon the update of the plugin.
• Plugin version: please follow along with the documentation only with the latest available version of the WP Travel Engine plugin. Some of the hooks and instructions will work only with the latest versions of WP Travel Engine.

Overriding Template Files #

WP Travel Engine template files contain the markup and template structure for single-trip, archives, and HTML emails of your travel website.

When you open these files, you will notice they all contain hooks that allow you to add/move content without needing to edit template files themselves. This method protects against upgrade issues, as the template files can be left completely untouched.

Template files can be found within the /wp-travel-engine/includes/templates/ directory.

Single Trip Template Files

/wp-travel-engine/includes/templates/single-trip.php
/wp-travel-engine/includes/templates/content-single-trip.php
/wp-travel-engine/includes/templates/single-trip/trip-content-wrapper-start.php
/wp-travel-engine/includes/templates/single-trip/trip-content.php
/wp-travel-engine/includes/templates/single-trip/title.php
/wp-travel-engine/includes/templates/single-trip/gallery.php
/wp-travel-engine/includes/templates/single-trip/tabs-nav.php
/wp-travel-engine/includes/templates/single-trip/tabs-content.php
/wp-travel-engine/includes/templates/single-trip/trip-content-wrapper-end.php
/wp-travel-engine/includes/templates/single-trip/trip-footer.php
/wp-travel-engine/includes/templates/single-trip/trip-sidebar.php

Single Trip Tabs

/wp-travel-engine/includes/templates/single-trip/trip-tabs/overview.php
/wp-travel-engine/includes/templates/single-trip/trip-tabs/itinerary-tab.php
/wp-travel-engine/includes/templates/single-trip/trip-tabs/cost.php
/wp-travel-engine/includes/templates/single-trip/trip-tabs/map.php
/wp-travel-engine/includes/templates/single-trip/trip-tabs/faqs.php

Archive Template Files

/wp-travel-engine/includes/templates/archive-trip.php
/wp-travel-engine/includes/templates/taxonomy-activities.php
/wp-travel-engine/includes/templates/taxonomy-destination.php
/wp-travel-engine/includes/templates/taxonomy-trip_types.php

Archive Template Layouts

/wp-travel-engine/includes/templates/content-grid.php
/wp-travel-engine/includes/templates/content-list.php
/wp-travel-engine/includes/templates/widgets/content-widget-feat-trip.php

Page Templates

/wp-travel-engine/includes/templates/template-activities.php
/wp-travel-engine/includes/templates/template-destination.php
/wp-travel-engine/includes/templates/template-trip_types.php
/wp-travel-engine/includes/templates/template-trip-listing.php

Email Templates

/wp-travel-engine/includes/templates/emails/customer-lost-password.php
/wp-travel-engine/includes/templates/emails/customer-new-account.php
/wp-travel-engine/includes/templates/emails/email-header.php
/wp-travel-engine/includes/templates/emails/email-footer.php

How to Edit Files #

Edit files in an upgrade-safe way using overrides. Copy the template into a directory within your theme named /wp-travel-engine keeping the same file structure but removing the /templates/ subdirectory.

Example: To override the Title on Single Trip, copy: wp-content/plugins/wp-travel-engine/includes/templates/single-trip/title.php to wp-content/themes/yourtheme/wp-travel-engine/single-trip/title.php

The copied file will now override the WP Travel Engine default template file.

Warning: Do not edit these files within the core plugin itself as they are overwritten during the upgrade process and any customizations will be lost.

Action Hooks #

All of the action hooks available in the WP Travel Engine are listed below with hook name, location, and example usage.

Trip single hooks #

wte_before_single_trip #

Fires before the single trip page content blocks are rendered.

Location: includes/templates/content-single-trip.php

do_action( 'wte_before_single_trip' );

do_action( 'wte_after_single_trip' );

     /**
       * wp_travel_engine_before_trip_content hook.
       *
       * @hooked trip_content_wrapper_start - 5 (outputs opening divs for the trip content)
       */ 
      do_action( 'wp_travel_engine_before_trip_content' );

     /**
       * wp_travel_engine_after_trip_content hook.
       *
       * @hooked trip_content_wrapper_end - 5 (outputs closing divs for the trip content)
       */ 
      do_action( 'wp_travel_engine_after_trip_content' );

do_action('wp_travel_engine_before_trip_tabs');

do_action('wp_travel_engine_after_trip_tabs');

/**
* @hook - wte_single_before_trip_tab_{field_name}
* Dynamic hooks before Tab wrapper - for themes to hook content into.
*/
do_action( "wte_single_before_trip_tab_{$field}" );

/**
* @hook - wte_single_after_trip_tab_{field_name}
* Dynamic hooks after Tab wrapper - for themes to hook content into.
*/
do_action( "wte_single_after_trip_tab_{$field}" );

do_action('wp_travel_engine_before_secondary');

do_action('wp_travel_engine_before_trip_price');

do_action('wp_travel_engine_after_trip_price');

do_action('wp_travel_engine_before_trip_facts');

wp_travel_engine_after_trip_facts #

Fires after the “trips info” section in the sidebar on the trip single page.

Location: public/class-wp-travel-engine-template-hooks.php

do_action('wp_travel_engine_after_trip_facts');

wp_travel_engine_before_related_posts #

Hook to add section/block before the related trips section on the trip single page.

Location: public/class-wp-travel-engine-template-hooks.php

do_action('wp_travel_engine_before_related_posts');

wp_travel_engine_after_related_posts #

Hook to add section/block after the related trips section on the trip single page.

Location: public/class-wp-travel-engine-template-hooks.php

do_action('wp_travel_engine_after_related_posts');

wpte_after_travellers_input #

Fires after the traveler numbers input field in the booking form on the single trip page.

Location: public/class-wp-travel-engine-template-hooks.php

do_action('wpte_after_travellers_input');

Removing template actions #

Besides all of the available template hooks for a trip single page developers can also unhook any added sections/actions as per their requirements. This can be beneficial in a situation that requires modification of HTML structures and swapping actions priorities to customize the trip single page.

Applies to: class WP_Travel_Engine_Template_Hooks();

Methods: init_hook(); & init_single_trip_hooks();

Example: Removing gallery slider from trip single page.

/**
 * Removing Gallery Slider from Trip Content
 *  
 * @package Wp_Travel_Engine
 */
$single_trip_hooks = WP_Travel_Engine_Template_Hooks::get_instance();
remove_action( 'wte_single_trip_content', array( $single_trip_hooks, 'display_single_trip_gallery' ), 10 );

Checkout page hooks #

wp_travel_engine_before_billing_form #

Fires before the output of billing form in the checkout page.

<?php do_action('wp_travel_engine_before_billing_form'); ?>

wte_booking_before_submit_button #

Fires before the billing form submit button on the checkout page.

<?php do_action('wte_booking_before_submit_button'); ?>

wte_booking_after_submit_button #

Fires after the billing form submit button on the checkout page.

<?php do_action('wte_booking_after_submit_button'); ?>

Mini-cart hooks

wte_bf_after_trip_name

Location: includes/templates/checkout/mini-cart.php

Fires after the trip name in the mini cart of the checkout page.

<?php do_action('wte_bf_after_trip_name'); ?>

Thank You page hooks #

wp_travel_engine_before_traveller_information_save #

Fires before saving the billing details are saved in thank you page.

<?php do_action('wp_travel_engine_before_traveller_information_save'); ?>

wp_travel_engine_after_traveller_information_save #

Fires after saving the billing details are saved in thank you page.

<?php do_action('wp_travel_engine_after_traveller_information_save'); ?>

Trip archive hooks #

<?php
/**
* wp_travel_engine_trip_archive_outer_wrapper hook.
*
* @hooked wp_travel_engine_trip_archive_outer_wrapper - 10 (main wrapper)
*/ 
do_action('wp_travel_engine_trip_archive_outer_wrapper');
?>

<?php
/**
* wp_travel_engine_trip_archive_loop_start hook.
*
* @hooked wp_travel_engine_trip_archive_loop_start - 10 (loop starts)
*/ 
do_action('wp_travel_engine_trip_archive_loop_start');
?>

<?php
/**
* wp_travel_engine_trip_archive_loop_end hook.
*
* @hooked wp_travel_engine_trip_archive_end_start - 10 (loop ends)
*/ 
do_action('wp_travel_engine_trip_archive_loop_end');
?>

/**

* Remove the Name in Ascending option from sorting options.

*

* @param array $options

* @return array $options

*/

function wpte_dev_doc_filter_archive_sorting_opts( $options) {

    if ( isset($options['name']) ) {

        unset($options['name']);

    }

  return $options;

}

add_filter( 'wp_travel_engine_archive_header_sorting_options', 'wpte_dev_doc_filter_archive_sorting_opts' );

add_filter( 'wte_trip_archive_description_page_header', '__return_false' );

/**

* Change image size to large

**/

add_filter('wp_travel_engine_template_banner_size', function( $size ){

     return 'large';

});

add_filter( 'wte_trip_archive_description_below_title', '__return_false' );

/**
* Remove enquiry form field
*/
add_filter( 'wp_travel_engine_enquiry_fields_display', function( $enquiry_fields ) {
  unset( $enquiry_fields['some_key'] );
  return $enquiry_fields;
} );

add_filter( 'wpte_show_tab_titles_inside_tabs', '__return_false' );

/**

* Removes the Progress Checkout Workflow from the content

*/

add_filter( 'wp_travel_engine_show_checkout_header_steps', '__return_false' );

/**
* Remove Checkout form field
*/
add_filter( 'wp_travel_engine_booking_fields_display', function( $booking_fields ) {
  unset( $booking_fields['some_key'] );
  return $booking_fields;
} );

define( 'WP_TRAVEL_ENGINE_FILE_PATH', __FILE__ );

define( 'WP_TRAVEL_ENGINE_BASE_PATH', dirname( __FILE__ ) );

define( 'WP_TRAVEL_ENGINE_TEMPLATE_PATH', WP_TRAVEL_ENGINE_BASE_PATH.'/includes/templates' );

define( 'WP_TRAVEL_ENGINE_FILE_URL', plugins_url( '', __FILE__ ) );

define( 'WP_TRAVEL_ENGINE_VERSION', 'version_number' );