function system_time_zones

1 system.module system_time_zones($blank = NULL)

Generate an array of time zones and their local time&date.

Parameters

$blank: If evaluates true, prepend an empty time zone option to the array.

4 calls to system_time_zones()

system_regional_settings in core/modules/system/system.admin.inc: Form builder; Configure the site regional settings.
system_user_timezone in core/modules/system/system.module: Add the time zone field to the user edit and register forms.
views_handler_field_date::options_form in core/modules/views/handlers/views_handler_field_date.inc: Default options form that provides the label widget that all fields should have.
_install_configure_form in core/includes/install.core.inc: Form constructor for a site configuration form.

File

core/modules/system/system.module, line 3870: Configuration system that lets administrators modify the workings of the site.

Code

function system_time_zones($blank = NULL) {
  $zone_list = timezone_identifiers_list();
  $zones = $blank ? array('' => t('- None selected -')) : array();
  foreach ($zone_list as $zone) {
    // Because many time zones exist in PHP only for backward compatibility
    // reasons and should not be used, the list is filtered by a regular
    // expression.
    if (preg_match('!^((Africa|America|Antarctica|Arctic|Asia|Atlantic|Australia|Europe|Indian|Pacific)/|UTC$)!', $zone)) {
      $zones[$zone] = t('@zone: @date', array('@zone' => t(str_replace('_', ' ', $zone)), '@date' => format_date(REQUEST_TIME, 'custom', config_get('system.date', 'formats.long.pattern.php') . ' O', $zone)));
    }
  }
  // Sort the translated time zones alphabetically.
  asort($zones);
  return $zones;
}