materio-base-d7/sites/all/modules/contrib/seo/metatag/metatag_twitter_cards/metatag_twitter_cards.install

<?php

/**
 * @file
 * Update scripts for the Metatag: Twitter Cards module.
 */

/**
 * Implements hook_update_dependencies().
 */
function metatag_twitter_cards_update_dependencies() {
  // Twitter Cards update 7100 requires the complete Metatag schema, so lets
  // wait for Metatag update 7100 just to be sure.
  $dependencies['metatag_twitter_cards'][7100] = array(
    'metatag' => 7100,
  );
  return $dependencies;
}

/**
 * Implements hook_uninstall().
 */
function metatag_twitter_cards_uninstall() {
  // Remove all of the maxlength variables.
  variable_del('metatag_maxlength_twitter:title');
  variable_del('metatag_maxlength_twitter:description');
}

/**
 * Implementations of hook_update_N().
 */

/**
 * Rename the 'twitter:image:src' meta tag back to 'twitter:image'. Sorry.
 */
function metatag_twitter_cards_update_7100(&$sandbox) {
  module_load_include('install', 'metatag');
  $old_tag = 'twitter:image:src';
  $new_tag = 'twitter:image';
  return metatag_update_replace_entity_tag($sandbox, $old_tag, $new_tag);
}

/**
 * Rename the 'twitter:image:src' meta tag back to 'twitter:image', part 2.
 */
function metatag_twitter_cards_update_7101() {
  module_load_include('install', 'metatag');
  $old_tag = 'twitter:image:src';
  $new_tag = 'twitter:image';
  return metatag_update_replace_config_tag($old_tag, $new_tag);
}

/**
 * Clear the Metatag cache.
 */
function metatag_twitter_cards_update_7102() {
  cache_clear_all('*', 'cache_metatag', TRUE);
  return t('All Metatag caches cleared.');
}