materio-base-d7/sites/all/modules/contrib/search/search_api_solr_overrides/search_api_solr_overrides.module

<?php

/**
 * @file
 * Core hook implementations for Search API Solr Overrides.
 */

/**
 * Implements hook_search_api_server_load().
 *
 * Provide a configuration as the same structure as the
 * search api server entity in array form (keyed by the
 * machine name of the solr service).
 *
 * Example:
 * $conf['search_api_solr_overrides'] = array(
 *   'solr-server-id' => array(
 *     'name' => 'Solr Server (Overridden)',
 *       'options' => array(
 *         'host' => '127.0.0.1',
 *         'port' => 8983,
 *         'path' => '/solr',
 *       ),
 *     ),
 *   ),
 * );
 *
 * Note: This is an example as solr configurations vary.
 */
function search_api_solr_overrides_search_api_server_load($servers) {
  // Get the solr host overrides.
  $overrides = variable_get('search_api_solr_overrides', FALSE);

  // Ensure the is information provided.
  if (empty($overrides) || !is_array($overrides)) {
    return;
  }

  // Loop over an make the required updates.
  foreach ($overrides as $id => $override) {
    // Check to see if the server config exists.
    if (!empty($servers[$id])) {
      foreach ($servers[$id] as $key => $field) {
        // Ensure we need to override. User isset, so we can set FALSE values.
        if (!isset($override[$key])) {
          continue;
        }

        // Check if the field contains an array.
        if (is_array($field)) {
          $servers[$id]->$key = array_merge($servers[$id]->$key, $override[$key]);
        }
        // Else its a value.
        else {
          $servers[$id]->$key = $override[$key];
        }
      }
    }
  }
}