materio-base-d7/sites/all/modules/contrib/taxonomy/taxonomy_csv/taxonomy_csv.install

<?php

/**
 * @file
 * Install, update and uninstall functions for the taxonomy_csv module.
 */

/**
 * Implements hook_install().
 */
function taxonomy_csv_install() {
  // Make uploads easy for csv files.
  variable_set('upload_extensions_default', variable_get('upload_extensions_default', '') . ' csv');

  drupal_set_message(filter_xss(st('Taxonomy CSV import/export has been installed. You can now import and export taxonomies, structures or lists of terms under <a href="!link_import">Administer > Structure > Taxonomy > CSV import</a> and <a href="!link_export">CSV export</a>. More information is available under <a href="!link_help">Administer > Help > Taxonomy CSV import/export</a>.<br /> Your comments are welcomed on the <a href=\"!link_module\">Taxonomy CSV import/export</a> module page.', array(
    '!link_import' => url('admin/structure/taxonomy/csv_import'),
    '!link_export' => url('admin/structure/taxonomy/csv_export'),
    '!link_help'   => url('admin/help/taxonomy_csv'),
    '!link_module' => url('https://drupal.org/project/taxonomy_csv'),
  ))));
}

/**
 * Implements hook_uninstall().
 */
function taxonomy_csv_uninstall() {
  // Simple DB query to get the names of the variables of the module.
  $results = db_select('variable', 'v')
    ->fields('v', array('name'))
    ->condition('name', 'taxonomy_csv_%', 'LIKE')
    ->execute();
  foreach ($results as $result) {
    variable_del($result->name);
  }

  drupal_set_message(st('Taxonomy csv import/export: All user preferences have been removed. Thanks for using this module!<br />
    Your comments are welcomed on <a href="!link">Taxonomy CSV import/export</a> module page.', array(
      '!link' => url('https://drupal.org/project/taxonomy_csv'),
  )));
}

/**
 * Implements hook_requirements().
 */
function taxonomy_csv_requirements($phase) {
  $requirements = array();

  $requirements['taxonomy_csv'] = array(
    'title' => 'Taxonomy CSV import/export is enabled',
    'value' => 'Taxonomy CSV is designed as a run-once setup or migration module. You may disable it once your imports and exports are processed.',
    'severity' => REQUIREMENT_INFO,
  );

  return $requirements;
}