martsie

<?php
/**
 * Non-JavaScript callback that returns hello world.
 */
function MY_CUSTOM_MODULE_nojs_callback() {
  return "Hello world";
}

martsie

<?php
/**
 * AJAX callback that prints hello world underneath our link.
 */
function MY_CUSTOM_MODULE_ajax_callback() {
  // Define a new array to hold our AJAX commands.
  $ajax_commands = array();
    
  // Create a new AJAX command that replaces the #page text with our own text.
  $ajax_commands[] = ajax_command_after('#my-special-link', 'Hello world');

martsie

<?php
function MY_CUSTOM_MODULE_trigger_page() {
  // Load in Drupal core AJAX library.
  drupal_add_library('system', 'drupal.ajax');
 
  // Load in our custom JavaScript.
  drupal_add_js(drupal_get_path('module', 'MY_CUSTOM_MODULE') . '/MY_CUSTOM_MODULE.js');
 
  // Present the user with a link with the id 'my-special-link'.
  return l('Run my AJAX commands', 'my-custom-path/nojs', array(

martsie

<?php
/**
 * Implements hook_menu().
 */
function MY_CUSTOM_MODULE_menu() {
  // Returns AJAX commands if the user has JavaScript turned on.
  $items['my-custom-path/ajax'] = array(
    'title' => 'My custom ajax callback',
    'page callback' => 'MY_CUSTOM_MODULE_ajax_callback',
    'access arguments' => array('access content'),

martsie

<?php
// Change the page title.
$site_title = variable_get('site_name');
$page_title = t('My Great Page');
$ajax_commands[] = ajax_command_invoke(NULL, 'changePageTitle', array($page_title . ' - ' . $site_title));

martsie

// Change the page title.
$ajax_commands[] = ajax_command_invoke(NULL, 'changePageTitle', array(t('My great page title')));

martsie

/**
 * Changes the page title. Can be called from Drupal AJAX commands using ajax_command_invoke().
 */
(function ($) {
  $.fn.changePageTitle = function(pageTitle) {
    document.title = pageTitle;
  };
})(jQuery);

martsie

<?php
function my_awesome_theme_item_list($variables) {
  $items = $variables['items'];
  $title = $variables['title'];
  $type = $variables['type'];
  $attributes = $variables['attributes'];
 
  // Only output the list container and title, if there are any list items.
  // Check to see whether the block title exists before adding a header.
  // Empty headers are not semantic and present accessibility challenges.

martsie

<?php
function my_awesome_theme_breadcrumb($variables) {
  $breadcrumb = $variables['breadcrumb'];
 
  if (!empty($breadcrumb)) {
    // Provide a navigational heading to give context for breadcrumb links to
    // screen-reader users. Make the heading invisible with .element-invisible.
    $output = '<h2 class="element-invisible">' . t('You are here') . '</h2>';
 
    // Add 'my-awesome-class' to the breadcrumb wrapper and change the separators from '»' to '::'.

martsie

<?php
// This will fail.
$this->assertTrue('foo' == 'bar',  'The two strings are equal to eachother.');
 
// This will pass.
$this->assertTrue('foo' == 'foo', 'The two strings are equal to eachother.');