browscap.module in Browscap 7.2

Replacement for PHP's get_browser() function.

File

browscap.module

<?php

/**
 * @file
 * Replacement for PHP's get_browser() function.
 */

// Include browscap data import and user agent recording functions.
include_once 'import.inc';

/**
 * Implements hook_permission().
 */
function browscap_permission() {
  return array(
    'administer browscap' => array(
      'title' => t('Administer browscap'),
    ),
  );
}

/**
 * Implements hook_menu().
 */
function browscap_menu() {
  $items['admin/config/system/browscap'] = array(
    'title' => 'Browscap',
    'description' => 'View the current browscap data version and configure automatic update settings.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array(
      'browscap_settings_form',
    ),
    'access arguments' => array(
      'administer browscap',
    ),
    'file' => 'browscap.admin.inc',
  );
  return $items;
}

/**
 * Implements hook_help().
 */
function browscap_help($path, $arg) {
  switch ($path) {
    case 'admin/config/system/browscap':
      return '<p>' . t('View the current browscap data version and configure automatic update settings.') . '</p>';
  }
}

/**
 * Implements hook_cron().
 */
function browscap_cron() {
  if (variable_get('browscap_enable_automatic_updates', FALSE)) {

    // Check the current update timer.
    $automatic_update_timer = variable_get('browscap_automatic_updates_timer', 604800);

    // Check when the last update occurred.
    $last_imported = variable_get('browscap_imported', 0);

    // Update the browscap data if the amount of time specified by the update
    // timer has passed.
    if ($last_imported + $automatic_update_timer < REQUEST_TIME) {

      // Update the browscap information.
      _browscap_import();
    }
  }
}

/**
 * Provide data about a user agent string or the current user agent.
 *
 * @param string $user_agent
 *   Optional user agent string to test. If empty, use the value from the
 *   current request.
 *
 * @return array
 *   An array of information about the user agent.
 */
function browscap_get_browser($user_agent = NULL) {

  // Determine the current user agent if a user agent was not specified.
  if ($user_agent != NULL) {
    $user_agent = check_plain(trim($user_agent));
  }
  elseif ($user_agent == NULL && isset($_SERVER['HTTP_USER_AGENT'])) {
    $user_agent = check_plain(trim($_SERVER['HTTP_USER_AGENT']));
  }
  else {
    $user_agent = 'Default Browser';
  }

  // Check the cache for user agent data.
  $cache = cache_get($user_agent, 'cache_browscap');

  // Attempt to find a cached user agent.
  // Otherwise store the user agent data in the cache.
  if (!empty($cache) && $cache->created > REQUEST_TIME - 60 * 60 * 24) {
    $user_agent_properties = $cache->data;
  }
  else {

    // Find the user agent's properties.
    // The useragent column contains the wildcarded pattern to match against our
    // full-length string while the ORDER BY chooses the most-specific matching
    // pattern.
    $user_agent_properties = db_query("SELECT * FROM {browscap} WHERE :useragent LIKE useragent ORDER BY LENGTH(useragent) DESC", array(
      ':useragent' => $user_agent,
    ))
      ->fetchObject();

    // Store user agent data in the cache.
    cache_set($user_agent, $user_agent_properties, 'cache_browscap');
  }

  // Create an array to hold the user agent's properties.
  $properties = array();

  // Return an array of user agent properties.
  if (isset($user_agent_properties) && isset($user_agent_properties->data)) {

    // Unserialize the user agent data found in the cache or the database.
    $properties = unserialize($user_agent_properties->data);

    // Set the user agent name and name pattern.
    $properties['useragent'] = $user_agent;
    $properties['browser_name_pattern'] = strtr($user_agent_properties->useragent, '%_', '*?');
  }
  else {

    // Set the user agent name and name pattern to 'unrecognized'.
    $properties['useragent'] = 'unrecognized';
    $properties['browser_name_pattern'] = strtr('unrecognized', '%_', '*?');
  }
  return $properties;
}

Functions

Name	Description
browscap_cron	Implements hook_cron().
browscap_get_browser	Provide data about a user agent string or the current user agent.
browscap_help	Implements hook_help().
browscap_menu	Implements hook_menu().
browscap_permission	Implements hook_permission().