class Search in Drupal 8

Filter handler for search keywords.

Plugin annotation

@ViewsFilter("search_keywords");

Hierarchy

• class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
  • class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
    • class \Drupal\views\Plugin\views\PluginBase implements DependentPluginInterface, ContainerFactoryPluginInterface, TrustedCallbackInterface, ViewsPluginInterface
      • class \Drupal\views\Plugin\views\HandlerBase implements ViewsHandlerInterface
        • class \Drupal\views\Plugin\views\filter\FilterPluginBase implements CacheableDependencyInterface
          • class \Drupal\search\Plugin\views\filter\Search

Related topics

Views filter handler plugins

Plugins that handle views filtering.

40 string references to 'Search'

AddHandler::buildForm in core/modules/views_ui/src/Form/Ajax/AddHandler.php

Form constructor.

block.block.bartik_search.yml in core/profiles/standard/config/install/block.block.bartik_search.yml

core/profiles/standard/config/install/block.block.bartik_search.yml

block.block.secondtestfor2354889.yml in core/modules/system/tests/fixtures/update/block.block.secondtestfor2354889.yml

core/modules/system/tests/fixtures/update/block.block.secondtestfor2354889.yml

block.block.umami_search.yml in core/profiles/demo_umami/config/install/block.block.umami_search.yml

core/profiles/demo_umami/config/install/block.block.umami_search.yml

BlockHiddenRegionTest::testBlockNotInHiddenRegion in core/modules/block/tests/src/Functional/BlockHiddenRegionTest.php

Tests that hidden regions do not inherit blocks when a theme is installed.

... See full list

File

core/modules/search/src/Plugin/views/filter/Search.php, line 20

Namespace

Drupal\search\Plugin\views\filter

class Search extends FilterPluginBase {

  /**
   * This filter is always considered multiple-valued.
   *
   * @var bool
   */
  protected $alwaysMultiple = TRUE;

  /**
   * A search query to use for parsing search keywords.
   *
   * @var \Drupal\search\ViewsSearchQuery
   */
  protected $searchQuery = NULL;

  /**
   * TRUE if the search query has been parsed.
   *
   * @var bool
   */
  protected $parsed = FALSE;

  /**
   * The search type name (value of {search_index}.type in the database).
   *
   * @var string
   */
  protected $searchType;

  /**
   * {@inheritdoc}
   */
  public function init(ViewExecutable $view, DisplayPluginBase $display, array &$options = NULL) {
    parent::init($view, $display, $options);
    $this->searchType = $this->definition['search_type'];
  }

  /**
   * {@inheritdoc}
   */
  protected function defineOptions() {
    $options = parent::defineOptions();
    $options['operator']['default'] = 'optional';
    return $options;
  }

  /**
   * {@inheritdoc}
   */
  protected function operatorForm(&$form, FormStateInterface $form_state) {
    $form['operator'] = [
      '#type' => 'radios',
      '#title' => $this
        ->t('On empty input'),
      '#default_value' => $this->operator,
      '#options' => [
        'optional' => $this
          ->t('Show All'),
        'required' => $this
          ->t('Show None'),
      ],
    ];
  }

  /**
   * {@inheritdoc}
   */
  protected function valueForm(&$form, FormStateInterface $form_state) {
    $form['value'] = [
      '#type' => 'textfield',
      '#size' => 15,
      '#default_value' => $this->value,
      '#attributes' => [
        'title' => $this
          ->t('Search keywords'),
      ],
      '#title' => !$form_state
        ->get('exposed') ? $this
        ->t('Keywords') : '',
    ];
  }

  /**
   * {@inheritdoc}
   */
  public function validateExposed(&$form, FormStateInterface $form_state) {
    if (!isset($this->options['expose']['identifier'])) {
      return;
    }
    $key = $this->options['expose']['identifier'];
    if (!$form_state
      ->isValueEmpty($key)) {
      $this
        ->queryParseSearchExpression($form_state
        ->getValue($key));
      if (count($this->searchQuery
        ->words()) == 0) {
        $form_state
          ->setErrorByName($key, $this
          ->formatPlural(\Drupal::config('search.settings')
          ->get('index.minimum_word_size'), 'You must include at least one keyword to match in the content, and punctuation is ignored.', 'You must include at least one keyword to match in the content. Keywords must be at least @count characters, and punctuation is ignored.'));
      }
    }
  }

  /**
   * Sets up and parses the search query.
   *
   * @param string $input
   *   The search keywords entered by the user.
   */
  protected function queryParseSearchExpression($input) {
    if (!isset($this->searchQuery)) {
      $this->parsed = TRUE;
      $this->searchQuery = \Drupal::service('database.replica')
        ->select('search_index', 'i')
        ->extend(ViewsSearchQuery::class);
      $this->searchQuery
        ->searchExpression($input, $this->searchType);
      $this->searchQuery
        ->publicParseSearchExpression();
    }
  }

  /**
   * {@inheritdoc}
   */
  public function query() {

    // Since attachment views don't validate the exposed input, parse the search
    // expression if required.
    if (!$this->parsed) {
      $this
        ->queryParseSearchExpression($this->value);
    }
    $required = FALSE;
    if (!isset($this->searchQuery)) {
      $required = TRUE;
    }
    else {
      $words = $this->searchQuery
        ->words();
      if (empty($words)) {
        $required = TRUE;
      }
    }
    if ($required) {
      if ($this->operator == 'required') {
        $this->query
          ->addWhere($this->options['group'], 'FALSE');
      }
    }
    else {
      $search_index = $this
        ->ensureMyTable();
      $search_condition = new Condition('AND');

      // Create a new join to relate the 'search_total' table to our current
      // 'search_index' table.
      $definition = [
        'table' => 'search_total',
        'field' => 'word',
        'left_table' => $search_index,
        'left_field' => 'word',
      ];
      $join = Views::pluginManager('join')
        ->createInstance('standard', $definition);
      $search_total = $this->query
        ->addRelationship('search_total', $join, $search_index);

      // Add the search score field to the query.
      $this->search_score = $this->query
        ->addField('', "{$search_index}.score * {$search_total}.count", 'score', [
        'function' => 'sum',
      ]);

      // Add the conditions set up by the search query to the views query.
      $search_condition
        ->condition("{$search_index}.type", $this->searchType);
      $search_dataset = $this->query
        ->addTable('node_search_dataset');
      $conditions = $this->searchQuery
        ->conditions();
      $condition_conditions =& $conditions
        ->conditions();
      foreach ($condition_conditions as $key => &$condition) {

        // Make sure we just look at real conditions.
        if (is_numeric($key)) {

          // Replace the conditions with the table alias of views.
          $this->searchQuery
            ->conditionReplaceString('d.', "{$search_dataset}.", $condition);
        }
      }
      $search_conditions =& $search_condition
        ->conditions();
      $search_conditions = array_merge($search_conditions, $condition_conditions);

      // Add the keyword conditions, as is done in
      // SearchQuery::prepareAndNormalize(), but simplified because we are
      // only concerned with relevance ranking so we do not need to normalize.
      $or = new Condition('OR');
      foreach ($words as $word) {
        $or
          ->condition("{$search_index}.word", $word);
      }
      $search_condition
        ->condition($or);
      $this->query
        ->addWhere($this->options['group'], $search_condition);

      // Add the GROUP BY and HAVING expressions to the query.
      $this->query
        ->addGroupBy("{$search_index}.sid");
      $matches = $this->searchQuery
        ->matches();
      $placeholder = $this
        ->placeholder();
      $this->query
        ->addHavingExpression($this->options['group'], "COUNT(*) >= {$placeholder}", [
        $placeholder => $matches,
      ]);
    }

    // Set to NULL to prevent PDO exception when views object is cached.
    $this->searchQuery = NULL;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DependencySerializationTrait::$_entityStorages	protected	property	An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds	protected	property	An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep	public	function		1
DependencySerializationTrait::__wakeup	public	function		2
FilterPluginBase::$always_required	public	property	Disable the possibility to allow a exposed input to be optional.
FilterPluginBase::$group_info	public	property	Contains the information of the selected item in a grouped filter.
FilterPluginBase::$no_operator	public	property	Disable the possibility to use operators.	1
FilterPluginBase::$operator	public	property	Contains the operator which is used on the query.
FilterPluginBase::$value	public	property	Contains the actual value of the field,either configured in the views ui or entered in the exposed filters.
FilterPluginBase::acceptExposedInput	public	function	Determines if the input from a filter should change the generated query. Overrides HandlerBase::acceptExposedInput	2
FilterPluginBase::addGroupForm	public	function	Add a new group to the exposed filter groups.
FilterPluginBase::adminSummary	public	function	Display the filter on the administrative summary Overrides HandlerBase::adminSummary	10
FilterPluginBase::arrayFilterZero	protected static	function	Filter by no empty values, though allow the use of (string) "0".
FilterPluginBase::buildExposedFiltersGroupForm	protected	function	Build the form to let users create the group of exposed filters. This form is displayed when users click on button 'Build group'
FilterPluginBase::buildExposedForm	public	function	Render our chunk of the exposed filter form when selecting Overrides HandlerBase::buildExposedForm
FilterPluginBase::buildExposeForm	public	function	Options form subform for exposed filter options. Overrides HandlerBase::buildExposeForm	4
FilterPluginBase::buildGroupForm	public	function	Displays the Build Group form.
FilterPluginBase::buildGroupOptions	protected	function	Provide default options for exposed filters.
FilterPluginBase::buildGroupSubmit	protected	function	Save new group items, re-enumerates and remove groups marked to delete.
FilterPluginBase::buildGroupValidate	protected	function	Validate the build group options form.
FilterPluginBase::buildOptionsForm	public	function	Provide the basic form which calls through to subforms. If overridden, it is best to call through to the parent, or to at least make sure all of the functions in this form are called. Overrides HandlerBase::buildOptionsForm	2
FilterPluginBase::canBuildGroup	protected	function	Determine if a filter can be converted into a group. Only exposed filters with operators available can be converted into groups.
FilterPluginBase::canExpose	public	function	Determine if a filter can be exposed. Overrides HandlerBase::canExpose	5
FilterPluginBase::canGroup	public	function	Can this filter be used in OR groups?	1
FilterPluginBase::convertExposedInput	public	function	Transform the input from a grouped filter into a standard filter.
FilterPluginBase::defaultExposeOptions	public	function	Provide default options for exposed filters. Overrides HandlerBase::defaultExposeOptions	4
FilterPluginBase::exposedInfo	public	function	Tell the renderer about our exposed form. This only needs to be overridden for particularly complex forms. And maybe not even then. Overrides HandlerBase::exposedInfo
FilterPluginBase::exposedTranslate	protected	function	Make some translations to a form item to make it more suitable to exposing.
FilterPluginBase::getCacheContexts	public	function	The cache contexts associated with this object. Overrides CacheableDependencyInterface::getCacheContexts	7
FilterPluginBase::getCacheMaxAge	public	function	The maximum age for which this object may be cached. Overrides CacheableDependencyInterface::getCacheMaxAge
FilterPluginBase::getCacheTags	public	function	The cache tags associated with this object. Overrides CacheableDependencyInterface::getCacheTags	1
FilterPluginBase::groupForm	public	function	Build a form containing a group of operator | values to apply as a single filter.
FilterPluginBase::groupMultipleExposedInput	public	function	Returns the options available for a grouped filter that users checkboxes as widget, and therefore has to be applied several times, one per item selected.
FilterPluginBase::hasValidGroupedValue	protected	function	Determines if the given grouped filter entry has a valid value.	1
FilterPluginBase::isAGroup	public	function	Returns TRUE if the exposed filter works like a grouped filter. Overrides HandlerBase::isAGroup
FilterPluginBase::multipleExposedInput	public	function	Returns TRUE if users can select multiple groups items of a grouped exposed filter. Overrides HandlerBase::multipleExposedInput
FilterPluginBase::operatorOptions	public	function	Provide a list of options for the default operator form. Should be overridden by classes that don't override operatorForm	5
FilterPluginBase::operatorSubmit	public	function	Perform any necessary changes to the form values prior to storage. There is no need for this function to actually store the data.
FilterPluginBase::operatorValidate	protected	function	Validate the operator form.
FilterPluginBase::prepareFilterSelectOptions	protected	function	Sanitizes the HTML select element's options.
FilterPluginBase::showBuildGroupButton	protected	function	Shortcut to display the build_group/hide button.
FilterPluginBase::showBuildGroupForm	public	function	Shortcut to display the exposed options form.
FilterPluginBase::showExposeButton	public	function	Shortcut to display the expose/hide button. Overrides HandlerBase::showExposeButton
FilterPluginBase::showOperatorForm	public	function	Shortcut to display the operator form.
FilterPluginBase::showValueForm	protected	function	Shortcut to display the value form.
FilterPluginBase::storeExposedInput	public	function	If set to remember exposed input in the session, store it there. Overrides HandlerBase::storeExposedInput
FilterPluginBase::storeGroupInput	public	function	If set to remember exposed input in the session, store it there. This function is similar to storeExposedInput but modified to work properly when the filter is a group.
FilterPluginBase::submitOptionsForm	public	function	Simple submit handler Overrides PluginBase::submitOptionsForm
FilterPluginBase::trustedCallbacks	public static	function	Lists the trusted callbacks provided by the implementing class. Overrides PluginBase::trustedCallbacks
FilterPluginBase::validate	public	function	Validate that the plugin is correct and can be saved. Overrides HandlerBase::validate	2
FilterPluginBase::validateExposeForm	public	function	Validate the options form. Overrides HandlerBase::validateExposeForm
FilterPluginBase::validateIdentifier	protected	function	Validates a filter identifier.
FilterPluginBase::validateOptionsForm	public	function	Simple validate handler Overrides PluginBase::validateOptionsForm	1
FilterPluginBase::valueSubmit	protected	function	Perform any necessary changes to the form values prior to storage. There is no need for this function to actually store the data.	1
FilterPluginBase::valueValidate	protected	function	Validate the options form.	3
HandlerBase::$field	public	property	With field you can override the realField if the real field is not set.
HandlerBase::$moduleHandler	protected	property	The module handler.	3
HandlerBase::$query	public	property	Where the $query object will reside:	7
HandlerBase::$realField	public	property	The actual field in the database table, maybe different on other kind of query plugins/special handlers.
HandlerBase::$relationship	public	property	The relationship used for this field.
HandlerBase::$table	public	property	The table this handler is attached to.
HandlerBase::$tableAlias	public	property	The alias of the table of this handler which is used in the query.
HandlerBase::$viewsData	protected	property	The views data service.
HandlerBase::access	public	function	Check whether given user has access to this handler. Overrides ViewsHandlerInterface::access	4
HandlerBase::adminLabel	public	function	Return a string representing this handler's name in the UI. Overrides ViewsHandlerInterface::adminLabel	4
HandlerBase::breakString	public static	function	Breaks x,y,z and x+y+z into an array. Overrides ViewsHandlerInterface::breakString
HandlerBase::broken	public	function	Determines if the handler is considered 'broken', meaning it's a placeholder used when a handler can't be found. Overrides ViewsHandlerInterface::broken
HandlerBase::buildExtraOptionsForm	public	function	Provide a form for setting options.	1
HandlerBase::buildGroupByForm	public	function	Provide a form for aggregation settings.	1
HandlerBase::calculateDependencies	public	function	Calculates dependencies for the configured plugin. Overrides PluginBase::calculateDependencies	10
HandlerBase::caseTransform	protected	function	Transform a string by a certain method.
HandlerBase::defineExtraOptions	public	function	Provide defaults for the handler.
HandlerBase::displayExposedForm	public	function	Displays the Expose form.
HandlerBase::ensureMyTable	public	function	Ensure the main table for this handler is in the query. This is used a lot. Overrides ViewsHandlerInterface::ensureMyTable	2
HandlerBase::getDateField	public	function	Creates cross-database SQL dates.	2
HandlerBase::getDateFormat	public	function	Creates cross-database SQL date formatting.	2
HandlerBase::getEntityType	public	function	Determines the entity type used by this handler. Overrides ViewsHandlerInterface::getEntityType
HandlerBase::getField	public	function	Shortcut to get a handler's raw field value. Overrides ViewsHandlerInterface::getField
HandlerBase::getJoin	public	function	Get the join object that should be used for this handler. Overrides ViewsHandlerInterface::getJoin
HandlerBase::getModuleHandler	protected	function	Gets the module handler.
HandlerBase::getTableJoin	public static	function	Fetches a handler to join one table to a primary table from the data cache. Overrides ViewsHandlerInterface::getTableJoin
HandlerBase::getViewsData	protected	function	Gets views data service.
HandlerBase::hasExtraOptions	public	function	If a handler has 'extra options' it will get a little settings widget and another form called extra_options.	1
HandlerBase::isExposed	public	function	Determine if this item is 'exposed', meaning it provides form elements to let users modify the view.
HandlerBase::placeholder	protected	function	Provides a unique placeholders for handlers.
HandlerBase::postExecute	public	function	Run after the view is executed, before the result is cached. Overrides ViewsHandlerInterface::postExecute
HandlerBase::preQuery	public	function	Run before the view is built. Overrides ViewsHandlerInterface::preQuery	2
HandlerBase::sanitizeValue	public	function	Sanitize the value for output. Overrides ViewsHandlerInterface::sanitizeValue
HandlerBase::setModuleHandler	public	function	Sets the module handler.
HandlerBase::setRelationship	public	function	Called just prior to query(), this lets a handler set up any relationship it needs. Overrides ViewsHandlerInterface::setRelationship
HandlerBase::setViewsData	public	function
HandlerBase::showExposeForm	public	function	Shortcut to display the exposed options form. Overrides ViewsHandlerInterface::showExposeForm
HandlerBase::submitExposed	public	function	Submit the exposed handler form
HandlerBase::submitExposeForm	public	function	Perform any necessary changes to the form exposes prior to storage. There is no need for this function to actually store the data.
HandlerBase::submitExtraOptionsForm	public	function	Perform any necessary changes to the form values prior to storage. There is no need for this function to actually store the data.
HandlerBase::submitFormCalculateOptions	public	function	Calculates options stored on the handler	1
HandlerBase::submitGroupByForm	public	function	Perform any necessary changes to the form values prior to storage. There is no need for this function to actually store the data.	1
HandlerBase::submitTemporaryForm	public	function	A submit handler that is used for storing temporary items when using multi-step changes, such as ajax requests.
HandlerBase::usesGroupBy	public	function	Provides the handler some groupby.	13
HandlerBase::validateExtraOptionsForm	public	function	Validate the options form.
HandlerBase::__construct	public	function	Constructs a Handler object. Overrides PluginBase::__construct	44
MessengerTrait::$messenger	protected	property	The messenger.	29
MessengerTrait::messenger	public	function	Gets the messenger.	29
MessengerTrait::setMessenger	public	function	Sets the messenger.
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	1
PluginBase::$definition	public	property	Plugins's definition
PluginBase::$displayHandler	public	property	The display object this plugin is for.
PluginBase::$options	public	property	Options for this plugin will be held here.
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.	1
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::$renderer	protected	property	Stores the render API renderer.	3
PluginBase::$usesOptions	protected	property	Denotes whether the plugin has an additional options form.	8
PluginBase::$view	public	property	The top object of a view.	1
PluginBase::create	public static	function	Creates an instance of the plugin. Overrides ContainerFactoryPluginInterface::create	62
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::destroy	public	function	Clears a plugin. Overrides ViewsPluginInterface::destroy	2
PluginBase::doFilterByDefinedOptions	protected	function	Do the work to filter out stored options depending on the defined options.
PluginBase::filterByDefinedOptions	public	function	Filter out stored options depending on the defined options. Overrides ViewsPluginInterface::filterByDefinedOptions
PluginBase::getAvailableGlobalTokens	public	function	Returns an array of available token replacements. Overrides ViewsPluginInterface::getAvailableGlobalTokens
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition	public	function	Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition	3
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::getProvider	public	function	Returns the plugin provider. Overrides ViewsPluginInterface::getProvider
PluginBase::getRenderer	protected	function	Returns the render API renderer.	1
PluginBase::globalTokenForm	public	function	Adds elements for available core tokens to a form. Overrides ViewsPluginInterface::globalTokenForm
PluginBase::globalTokenReplace	public	function	Returns a string with any core tokens replaced. Overrides ViewsPluginInterface::globalTokenReplace
PluginBase::INCLUDE_ENTITY		constant	Include entity row languages when listing languages.
PluginBase::INCLUDE_NEGOTIATED		constant	Include negotiated languages when listing languages.
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
PluginBase::listLanguages	protected	function	Makes an array of languages, optionally including special languages.
PluginBase::pluginTitle	public	function	Return the human readable name of the display. Overrides ViewsPluginInterface::pluginTitle
PluginBase::preRenderAddFieldsetMarkup	public static	function	Moves form elements into fieldsets for presentation purposes. Overrides ViewsPluginInterface::preRenderAddFieldsetMarkup
PluginBase::preRenderFlattenData	public static	function	Flattens the structure of form elements. Overrides ViewsPluginInterface::preRenderFlattenData
PluginBase::queryLanguageSubstitutions	public static	function	Returns substitutions for Views queries for languages.
PluginBase::setOptionDefaults	protected	function	Fills up the options of the plugin with defaults.
PluginBase::summaryTitle	public	function	Returns the summary of the settings in the display. Overrides ViewsPluginInterface::summaryTitle	6
PluginBase::themeFunctions	public	function	Provide a full list of possible theme templates used by this style. Overrides ViewsPluginInterface::themeFunctions	1
PluginBase::unpackOptions	public	function	Unpack options over our existing defaults, drilling down into arrays so that defaults don't get totally blown away. Overrides ViewsPluginInterface::unpackOptions
PluginBase::usesOptions	public	function	Returns the usesOptions property. Overrides ViewsPluginInterface::usesOptions	8
PluginBase::viewsTokenReplace	protected	function	Replaces Views' tokens in a given string. The resulting string will be sanitized with Xss::filterAdmin.	1
PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT		constant	Query string to indicate the site default language.
Search::$alwaysMultiple	protected	property	This filter is always considered multiple-valued. Overrides FilterPluginBase::$alwaysMultiple
Search::$parsed	protected	property	TRUE if the search query has been parsed.
Search::$searchQuery	protected	property	A search query to use for parsing search keywords.
Search::$searchType	protected	property	The search type name (value of {search_index}.type in the database).
Search::defineOptions	protected	function	Information about options for all kinds of purposes will be held here. Overrides FilterPluginBase::defineOptions
Search::init	public	function	Overrides \Drupal\views\Plugin\views\HandlerBase::init(). Overrides FilterPluginBase::init
Search::operatorForm	protected	function	Options form subform for setting the operator. Overrides FilterPluginBase::operatorForm
Search::query	public	function	Add this filter to the query. Overrides FilterPluginBase::query
Search::queryParseSearchExpression	protected	function	Sets up and parses the search query.
Search::validateExposed	public	function	Validate the exposed handler form Overrides HandlerBase::validateExposed
Search::valueForm	protected	function	Options form subform for setting options. Overrides FilterPluginBase::valueForm
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	1
StringTranslationTrait::formatPlural	protected	function	Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals	protected	function	Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation	protected	function	Gets the string translation service.
StringTranslationTrait::setStringTranslation	public	function	Sets the string translation service to use.	2
StringTranslationTrait::t	protected	function	Translates a string to the current language or to a given language.
TrustedCallbackInterface::THROW_EXCEPTION		constant	Untrusted callbacks throw exceptions.
TrustedCallbackInterface::TRIGGER_SILENCED_DEPRECATION		constant	Untrusted callbacks trigger silenced E_USER_DEPRECATION errors.
TrustedCallbackInterface::TRIGGER_WARNING		constant	Untrusted callbacks trigger E_USER_WARNING errors.