1000 lines
35 KiB
PHP
1000 lines
35 KiB
PHP
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<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\web;
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use Yii;
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use yii\base\Component;
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use yii\base\InvalidArgumentException;
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use yii\base\InvalidConfigException;
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/**
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* Session provides session data management and the related configurations.
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*
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* Session is a Web application component that can be accessed via `Yii::$app->session`.
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*
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* To start the session, call [[open()]]; To complete and send out session data, call [[close()]];
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* To destroy the session, call [[destroy()]].
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*
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* Session can be used like an array to set and get session data. For example,
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*
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* ```php
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* $session = new Session;
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* $session->open();
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* $value1 = $session['name1']; // get session variable 'name1'
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* $value2 = $session['name2']; // get session variable 'name2'
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* foreach ($session as $name => $value) // traverse all session variables
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* $session['name3'] = $value3; // set session variable 'name3'
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* ```
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*
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* Session can be extended to support customized session storage.
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* To do so, override [[useCustomStorage]] so that it returns true, and
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* override these methods with the actual logic about using custom storage:
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* [[openSession()]], [[closeSession()]], [[readSession()]], [[writeSession()]],
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* [[destroySession()]] and [[gcSession()]].
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*
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* Session also supports a special type of session data, called *flash messages*.
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* A flash message is available only in the current request and the next request.
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* After that, it will be deleted automatically. Flash messages are particularly
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* useful for displaying confirmation messages. To use flash messages, simply
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* call methods such as [[setFlash()]], [[getFlash()]].
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*
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* For more details and usage information on Session, see the [guide article on sessions](guide:runtime-sessions-cookies).
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*
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* @property array $allFlashes Flash messages (key => message or key => [message1, message2]). This property
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* is read-only.
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* @property string $cacheLimiter Current cache limiter. This property is read-only.
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* @property array $cookieParams The session cookie parameters. This property is read-only.
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* @property int $count The number of session variables. This property is read-only.
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* @property string $flash The key identifying the flash message. Note that flash messages and normal session
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* variables share the same name space. If you have a normal session variable using the same name, its value will
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* be overwritten by this method. This property is write-only.
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* @property float $gCProbability The probability (percentage) that the GC (garbage collection) process is
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* started on every session initialization.
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* @property bool $hasSessionId Whether the current request has sent the session ID.
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* @property string $id The current session ID.
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* @property bool $isActive Whether the session has started. This property is read-only.
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* @property SessionIterator $iterator An iterator for traversing the session variables. This property is
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* read-only.
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* @property string $name The current session name.
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* @property string $savePath The current session save path, defaults to '/tmp'.
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* @property int $timeout The number of seconds after which data will be seen as 'garbage' and cleaned up. The
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* default value is 1440 seconds (or the value of "session.gc_maxlifetime" set in php.ini).
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* @property bool|null $useCookies The value indicating whether cookies should be used to store session IDs.
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* @property bool $useCustomStorage Whether to use custom storage. This property is read-only.
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* @property bool $useTransparentSessionID Whether transparent sid support is enabled or not, defaults to
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* false.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @since 2.0
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*/
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class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Countable
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{
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/**
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* @var string the name of the session variable that stores the flash message data.
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*/
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public $flashParam = '__flash';
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/**
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* @var \SessionHandlerInterface|array an object implementing the SessionHandlerInterface or a configuration array. If set, will be used to provide persistency instead of build-in methods.
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*/
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public $handler;
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/**
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* @var array parameter-value pairs to override default session cookie parameters that are used for session_set_cookie_params() function
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* Array may have the following possible keys: 'lifetime', 'path', 'domain', 'secure', 'httponly'
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* @see https://secure.php.net/manual/en/function.session-set-cookie-params.php
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*/
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private $_cookieParams = ['httponly' => true];
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/**
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* @var $frozenSessionData array|null is used for saving session between recreations due to session parameters update.
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*/
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private $frozenSessionData;
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/**
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* Initializes the application component.
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* This method is required by IApplicationComponent and is invoked by application.
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*/
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public function init()
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{
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parent::init();
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register_shutdown_function([$this, 'close']);
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if ($this->getIsActive()) {
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Yii::warning('Session is already started', __METHOD__);
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$this->updateFlashCounters();
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}
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}
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/**
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* Returns a value indicating whether to use custom session storage.
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* This method should be overridden to return true by child classes that implement custom session storage.
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* To implement custom session storage, override these methods: [[openSession()]], [[closeSession()]],
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* [[readSession()]], [[writeSession()]], [[destroySession()]] and [[gcSession()]].
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* @return bool whether to use custom storage.
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*/
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public function getUseCustomStorage()
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{
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return false;
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}
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/**
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* Starts the session.
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*/
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public function open()
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{
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if ($this->getIsActive()) {
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return;
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}
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$this->registerSessionHandler();
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$this->setCookieParamsInternal();
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YII_DEBUG ? session_start() : @session_start();
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if ($this->getIsActive()) {
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Yii::info('Session started', __METHOD__);
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$this->updateFlashCounters();
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} else {
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$error = error_get_last();
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$message = isset($error['message']) ? $error['message'] : 'Failed to start session.';
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Yii::error($message, __METHOD__);
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}
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}
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/**
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* Registers session handler.
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* @throws \yii\base\InvalidConfigException
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*/
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protected function registerSessionHandler()
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{
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if ($this->handler !== null) {
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if (!is_object($this->handler)) {
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$this->handler = Yii::createObject($this->handler);
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}
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if (!$this->handler instanceof \SessionHandlerInterface) {
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throw new InvalidConfigException('"' . get_class($this) . '::handler" must implement the SessionHandlerInterface.');
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}
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YII_DEBUG ? session_set_save_handler($this->handler, false) : @session_set_save_handler($this->handler, false);
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} elseif ($this->getUseCustomStorage()) {
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if (YII_DEBUG) {
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session_set_save_handler(
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[$this, 'openSession'],
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[$this, 'closeSession'],
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[$this, 'readSession'],
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[$this, 'writeSession'],
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[$this, 'destroySession'],
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[$this, 'gcSession']
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);
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} else {
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@session_set_save_handler(
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[$this, 'openSession'],
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[$this, 'closeSession'],
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[$this, 'readSession'],
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[$this, 'writeSession'],
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[$this, 'destroySession'],
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[$this, 'gcSession']
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);
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}
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}
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}
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/**
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* Ends the current session and store session data.
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*/
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public function close()
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{
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if ($this->getIsActive()) {
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YII_DEBUG ? session_write_close() : @session_write_close();
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}
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}
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/**
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* Frees all session variables and destroys all data registered to a session.
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*
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* This method has no effect when session is not [[getIsActive()|active]].
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* Make sure to call [[open()]] before calling it.
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* @see open()
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* @see isActive
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*/
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public function destroy()
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{
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if ($this->getIsActive()) {
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$sessionId = session_id();
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$this->close();
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$this->setId($sessionId);
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$this->open();
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session_unset();
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session_destroy();
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$this->setId($sessionId);
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}
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}
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/**
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* @return bool whether the session has started
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*/
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public function getIsActive()
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{
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return session_status() === PHP_SESSION_ACTIVE;
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}
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private $_hasSessionId;
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/**
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* Returns a value indicating whether the current request has sent the session ID.
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* The default implementation will check cookie and $_GET using the session name.
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* If you send session ID via other ways, you may need to override this method
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* or call [[setHasSessionId()]] to explicitly set whether the session ID is sent.
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* @return bool whether the current request has sent the session ID.
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*/
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public function getHasSessionId()
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{
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if ($this->_hasSessionId === null) {
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$name = $this->getName();
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$request = Yii::$app->getRequest();
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if (!empty($_COOKIE[$name]) && ini_get('session.use_cookies')) {
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$this->_hasSessionId = true;
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} elseif (!ini_get('session.use_only_cookies') && ini_get('session.use_trans_sid')) {
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$this->_hasSessionId = $request->get($name) != '';
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} else {
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$this->_hasSessionId = false;
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}
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}
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return $this->_hasSessionId;
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}
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/**
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* Sets the value indicating whether the current request has sent the session ID.
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* This method is provided so that you can override the default way of determining
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* whether the session ID is sent.
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* @param bool $value whether the current request has sent the session ID.
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*/
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public function setHasSessionId($value)
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{
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$this->_hasSessionId = $value;
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}
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/**
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* Gets the session ID.
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* This is a wrapper for [PHP session_id()](https://secure.php.net/manual/en/function.session-id.php).
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* @return string the current session ID
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*/
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public function getId()
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{
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return session_id();
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}
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/**
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* Sets the session ID.
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* This is a wrapper for [PHP session_id()](https://secure.php.net/manual/en/function.session-id.php).
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* @param string $value the session ID for the current session
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*/
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public function setId($value)
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{
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session_id($value);
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}
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/**
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* Updates the current session ID with a newly generated one.
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*
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* Please refer to <https://secure.php.net/session_regenerate_id> for more details.
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*
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* This method has no effect when session is not [[getIsActive()|active]].
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* Make sure to call [[open()]] before calling it.
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*
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* @param bool $deleteOldSession Whether to delete the old associated session file or not.
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* @see open()
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* @see isActive
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*/
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public function regenerateID($deleteOldSession = false)
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{
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if ($this->getIsActive()) {
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// add @ to inhibit possible warning due to race condition
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// https://github.com/yiisoft/yii2/pull/1812
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if (YII_DEBUG && !headers_sent()) {
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session_regenerate_id($deleteOldSession);
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} else {
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@session_regenerate_id($deleteOldSession);
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}
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}
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}
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/**
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* Gets the name of the current session.
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* This is a wrapper for [PHP session_name()](https://secure.php.net/manual/en/function.session-name.php).
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* @return string the current session name
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*/
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public function getName()
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{
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return session_name();
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}
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/**
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* Sets the name for the current session.
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* This is a wrapper for [PHP session_name()](https://secure.php.net/manual/en/function.session-name.php).
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* @param string $value the session name for the current session, must be an alphanumeric string.
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* It defaults to "PHPSESSID".
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*/
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public function setName($value)
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{
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$this->freeze();
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session_name($value);
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$this->unfreeze();
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}
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/**
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* Gets the current session save path.
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* This is a wrapper for [PHP session_save_path()](https://secure.php.net/manual/en/function.session-save-path.php).
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* @return string the current session save path, defaults to '/tmp'.
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*/
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public function getSavePath()
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{
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return session_save_path();
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}
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/**
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* Sets the current session save path.
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* This is a wrapper for [PHP session_save_path()](https://secure.php.net/manual/en/function.session-save-path.php).
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* @param string $value the current session save path. This can be either a directory name or a [path alias](guide:concept-aliases).
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* @throws InvalidArgumentException if the path is not a valid directory
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*/
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public function setSavePath($value)
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{
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$path = Yii::getAlias($value);
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if (is_dir($path)) {
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session_save_path($path);
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} else {
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throw new InvalidArgumentException("Session save path is not a valid directory: $value");
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}
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}
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/**
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* @return array the session cookie parameters.
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* @see https://secure.php.net/manual/en/function.session-get-cookie-params.php
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*/
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public function getCookieParams()
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{
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return array_merge(session_get_cookie_params(), array_change_key_case($this->_cookieParams));
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}
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/**
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* Sets the session cookie parameters.
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* The cookie parameters passed to this method will be merged with the result
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* of `session_get_cookie_params()`.
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* @param array $value cookie parameters, valid keys include: `lifetime`, `path`, `domain`, `secure` and `httponly`.
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|
|
* Starting with Yii 2.0.21 `sameSite` is also supported. It requires PHP version 7.3.0 or higher.
|
||
|
|
* For securtiy, an exception will be thrown if `sameSite` is set while using an unsupported version of PHP.
|
||
|
|
* To use this feature across different PHP versions check the version first. E.g.
|
||
|
|
* ```php
|
||
|
|
* [
|
||
|
|
* 'sameSite' => PHP_VERSION_ID >= 70300 ? yii\web\Cookie::SAME_SITE_LAX : null,
|
||
|
|
* ]
|
||
|
|
* ```
|
||
|
|
* See https://www.owasp.org/index.php/SameSite for more information about `sameSite`.
|
||
|
|
*
|
||
|
|
* @throws InvalidArgumentException if the parameters are incomplete.
|
||
|
|
* @see https://secure.php.net/manual/en/function.session-set-cookie-params.php
|
||
|
|
*/
|
||
|
|
public function setCookieParams(array $value)
|
||
|
|
{
|
||
|
|
$this->_cookieParams = $value;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Sets the session cookie parameters.
|
||
|
|
* This method is called by [[open()]] when it is about to open the session.
|
||
|
|
* @throws InvalidArgumentException if the parameters are incomplete.
|
||
|
|
* @see https://secure.php.net/manual/en/function.session-set-cookie-params.php
|
||
|
|
*/
|
||
|
|
private function setCookieParamsInternal()
|
||
|
|
{
|
||
|
|
$data = $this->getCookieParams();
|
||
|
|
if (isset($data['lifetime'], $data['path'], $data['domain'], $data['secure'], $data['httponly'])) {
|
||
|
|
if (PHP_VERSION_ID >= 70300) {
|
||
|
|
session_set_cookie_params($data);
|
||
|
|
} else {
|
||
|
|
if (!empty($data['samesite'])) {
|
||
|
|
$data['path'] .= '; samesite=' . $data['samesite'];
|
||
|
|
}
|
||
|
|
session_set_cookie_params($data['lifetime'], $data['path'], $data['domain'], $data['secure'], $data['httponly']);
|
||
|
|
}
|
||
|
|
|
||
|
|
} else {
|
||
|
|
throw new InvalidArgumentException('Please make sure cookieParams contains these elements: lifetime, path, domain, secure and httponly.');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the value indicating whether cookies should be used to store session IDs.
|
||
|
|
* @return bool|null the value indicating whether cookies should be used to store session IDs.
|
||
|
|
* @see setUseCookies()
|
||
|
|
*/
|
||
|
|
public function getUseCookies()
|
||
|
|
{
|
||
|
|
if (ini_get('session.use_cookies') === '0') {
|
||
|
|
return false;
|
||
|
|
} elseif (ini_get('session.use_only_cookies') === '1') {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Sets the value indicating whether cookies should be used to store session IDs.
|
||
|
|
*
|
||
|
|
* Three states are possible:
|
||
|
|
*
|
||
|
|
* - true: cookies and only cookies will be used to store session IDs.
|
||
|
|
* - false: cookies will not be used to store session IDs.
|
||
|
|
* - null: if possible, cookies will be used to store session IDs; if not, other mechanisms will be used (e.g. GET parameter)
|
||
|
|
*
|
||
|
|
* @param bool|null $value the value indicating whether cookies should be used to store session IDs.
|
||
|
|
*/
|
||
|
|
public function setUseCookies($value)
|
||
|
|
{
|
||
|
|
$this->freeze();
|
||
|
|
if ($value === false) {
|
||
|
|
ini_set('session.use_cookies', '0');
|
||
|
|
ini_set('session.use_only_cookies', '0');
|
||
|
|
} elseif ($value === true) {
|
||
|
|
ini_set('session.use_cookies', '1');
|
||
|
|
ini_set('session.use_only_cookies', '1');
|
||
|
|
} else {
|
||
|
|
ini_set('session.use_cookies', '1');
|
||
|
|
ini_set('session.use_only_cookies', '0');
|
||
|
|
}
|
||
|
|
$this->unfreeze();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @return float the probability (percentage) that the GC (garbage collection) process is started on every session initialization.
|
||
|
|
*/
|
||
|
|
public function getGCProbability()
|
||
|
|
{
|
||
|
|
return (float) (ini_get('session.gc_probability') / ini_get('session.gc_divisor') * 100);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param float $value the probability (percentage) that the GC (garbage collection) process is started on every session initialization.
|
||
|
|
* @throws InvalidArgumentException if the value is not between 0 and 100.
|
||
|
|
*/
|
||
|
|
public function setGCProbability($value)
|
||
|
|
{
|
||
|
|
$this->freeze();
|
||
|
|
if ($value >= 0 && $value <= 100) {
|
||
|
|
// percent * 21474837 / 2147483647 ≈ percent * 0.01
|
||
|
|
ini_set('session.gc_probability', floor($value * 21474836.47));
|
||
|
|
ini_set('session.gc_divisor', 2147483647);
|
||
|
|
} else {
|
||
|
|
throw new InvalidArgumentException('GCProbability must be a value between 0 and 100.');
|
||
|
|
}
|
||
|
|
$this->unfreeze();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @return bool whether transparent sid support is enabled or not, defaults to false.
|
||
|
|
*/
|
||
|
|
public function getUseTransparentSessionID()
|
||
|
|
{
|
||
|
|
return ini_get('session.use_trans_sid') == 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param bool $value whether transparent sid support is enabled or not.
|
||
|
|
*/
|
||
|
|
public function setUseTransparentSessionID($value)
|
||
|
|
{
|
||
|
|
$this->freeze();
|
||
|
|
ini_set('session.use_trans_sid', $value ? '1' : '0');
|
||
|
|
$this->unfreeze();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @return int the number of seconds after which data will be seen as 'garbage' and cleaned up.
|
||
|
|
* The default value is 1440 seconds (or the value of "session.gc_maxlifetime" set in php.ini).
|
||
|
|
*/
|
||
|
|
public function getTimeout()
|
||
|
|
{
|
||
|
|
return (int) ini_get('session.gc_maxlifetime');
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param int $value the number of seconds after which data will be seen as 'garbage' and cleaned up
|
||
|
|
*/
|
||
|
|
public function setTimeout($value)
|
||
|
|
{
|
||
|
|
$this->freeze();
|
||
|
|
ini_set('session.gc_maxlifetime', $value);
|
||
|
|
$this->unfreeze();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Session open handler.
|
||
|
|
* This method should be overridden if [[useCustomStorage]] returns true.
|
||
|
|
* @internal Do not call this method directly.
|
||
|
|
* @param string $savePath session save path
|
||
|
|
* @param string $sessionName session name
|
||
|
|
* @return bool whether session is opened successfully
|
||
|
|
*/
|
||
|
|
public function openSession($savePath, $sessionName)
|
||
|
|
{
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Session close handler.
|
||
|
|
* This method should be overridden if [[useCustomStorage]] returns true.
|
||
|
|
* @internal Do not call this method directly.
|
||
|
|
* @return bool whether session is closed successfully
|
||
|
|
*/
|
||
|
|
public function closeSession()
|
||
|
|
{
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Session read handler.
|
||
|
|
* This method should be overridden if [[useCustomStorage]] returns true.
|
||
|
|
* @internal Do not call this method directly.
|
||
|
|
* @param string $id session ID
|
||
|
|
* @return string the session data
|
||
|
|
*/
|
||
|
|
public function readSession($id)
|
||
|
|
{
|
||
|
|
return '';
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Session write handler.
|
||
|
|
* This method should be overridden if [[useCustomStorage]] returns true.
|
||
|
|
* @internal Do not call this method directly.
|
||
|
|
* @param string $id session ID
|
||
|
|
* @param string $data session data
|
||
|
|
* @return bool whether session write is successful
|
||
|
|
*/
|
||
|
|
public function writeSession($id, $data)
|
||
|
|
{
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Session destroy handler.
|
||
|
|
* This method should be overridden if [[useCustomStorage]] returns true.
|
||
|
|
* @internal Do not call this method directly.
|
||
|
|
* @param string $id session ID
|
||
|
|
* @return bool whether session is destroyed successfully
|
||
|
|
*/
|
||
|
|
public function destroySession($id)
|
||
|
|
{
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Session GC (garbage collection) handler.
|
||
|
|
* This method should be overridden if [[useCustomStorage]] returns true.
|
||
|
|
* @internal Do not call this method directly.
|
||
|
|
* @param int $maxLifetime the number of seconds after which data will be seen as 'garbage' and cleaned up.
|
||
|
|
* @return bool whether session is GCed successfully
|
||
|
|
*/
|
||
|
|
public function gcSession($maxLifetime)
|
||
|
|
{
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns an iterator for traversing the session variables.
|
||
|
|
* This method is required by the interface [[\IteratorAggregate]].
|
||
|
|
* @return SessionIterator an iterator for traversing the session variables.
|
||
|
|
*/
|
||
|
|
public function getIterator()
|
||
|
|
{
|
||
|
|
$this->open();
|
||
|
|
return new SessionIterator();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the number of items in the session.
|
||
|
|
* @return int the number of session variables
|
||
|
|
*/
|
||
|
|
public function getCount()
|
||
|
|
{
|
||
|
|
$this->open();
|
||
|
|
return count($_SESSION);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the number of items in the session.
|
||
|
|
* This method is required by [[\Countable]] interface.
|
||
|
|
* @return int number of items in the session.
|
||
|
|
*/
|
||
|
|
public function count()
|
||
|
|
{
|
||
|
|
return $this->getCount();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the session variable value with the session variable name.
|
||
|
|
* If the session variable does not exist, the `$defaultValue` will be returned.
|
||
|
|
* @param string $key the session variable name
|
||
|
|
* @param mixed $defaultValue the default value to be returned when the session variable does not exist.
|
||
|
|
* @return mixed the session variable value, or $defaultValue if the session variable does not exist.
|
||
|
|
*/
|
||
|
|
public function get($key, $defaultValue = null)
|
||
|
|
{
|
||
|
|
$this->open();
|
||
|
|
return isset($_SESSION[$key]) ? $_SESSION[$key] : $defaultValue;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds a session variable.
|
||
|
|
* If the specified name already exists, the old value will be overwritten.
|
||
|
|
* @param string $key session variable name
|
||
|
|
* @param mixed $value session variable value
|
||
|
|
*/
|
||
|
|
public function set($key, $value)
|
||
|
|
{
|
||
|
|
$this->open();
|
||
|
|
$_SESSION[$key] = $value;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Removes a session variable.
|
||
|
|
* @param string $key the name of the session variable to be removed
|
||
|
|
* @return mixed the removed value, null if no such session variable.
|
||
|
|
*/
|
||
|
|
public function remove($key)
|
||
|
|
{
|
||
|
|
$this->open();
|
||
|
|
if (isset($_SESSION[$key])) {
|
||
|
|
$value = $_SESSION[$key];
|
||
|
|
unset($_SESSION[$key]);
|
||
|
|
|
||
|
|
return $value;
|
||
|
|
}
|
||
|
|
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Removes all session variables.
|
||
|
|
*/
|
||
|
|
public function removeAll()
|
||
|
|
{
|
||
|
|
$this->open();
|
||
|
|
foreach (array_keys($_SESSION) as $key) {
|
||
|
|
unset($_SESSION[$key]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param mixed $key session variable name
|
||
|
|
* @return bool whether there is the named session variable
|
||
|
|
*/
|
||
|
|
public function has($key)
|
||
|
|
{
|
||
|
|
$this->open();
|
||
|
|
return isset($_SESSION[$key]);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Updates the counters for flash messages and removes outdated flash messages.
|
||
|
|
* This method should only be called once in [[init()]].
|
||
|
|
*/
|
||
|
|
protected function updateFlashCounters()
|
||
|
|
{
|
||
|
|
$counters = $this->get($this->flashParam, []);
|
||
|
|
if (is_array($counters)) {
|
||
|
|
foreach ($counters as $key => $count) {
|
||
|
|
if ($count > 0) {
|
||
|
|
unset($counters[$key], $_SESSION[$key]);
|
||
|
|
} elseif ($count == 0) {
|
||
|
|
$counters[$key]++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$_SESSION[$this->flashParam] = $counters;
|
||
|
|
} else {
|
||
|
|
// fix the unexpected problem that flashParam doesn't return an array
|
||
|
|
unset($_SESSION[$this->flashParam]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a flash message.
|
||
|
|
* @param string $key the key identifying the flash message
|
||
|
|
* @param mixed $defaultValue value to be returned if the flash message does not exist.
|
||
|
|
* @param bool $delete whether to delete this flash message right after this method is called.
|
||
|
|
* If false, the flash message will be automatically deleted in the next request.
|
||
|
|
* @return mixed the flash message or an array of messages if addFlash was used
|
||
|
|
* @see setFlash()
|
||
|
|
* @see addFlash()
|
||
|
|
* @see hasFlash()
|
||
|
|
* @see getAllFlashes()
|
||
|
|
* @see removeFlash()
|
||
|
|
*/
|
||
|
|
public function getFlash($key, $defaultValue = null, $delete = false)
|
||
|
|
{
|
||
|
|
$counters = $this->get($this->flashParam, []);
|
||
|
|
if (isset($counters[$key])) {
|
||
|
|
$value = $this->get($key, $defaultValue);
|
||
|
|
if ($delete) {
|
||
|
|
$this->removeFlash($key);
|
||
|
|
} elseif ($counters[$key] < 0) {
|
||
|
|
// mark for deletion in the next request
|
||
|
|
$counters[$key] = 1;
|
||
|
|
$_SESSION[$this->flashParam] = $counters;
|
||
|
|
}
|
||
|
|
|
||
|
|
return $value;
|
||
|
|
}
|
||
|
|
|
||
|
|
return $defaultValue;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns all flash messages.
|
||
|
|
*
|
||
|
|
* You may use this method to display all the flash messages in a view file:
|
||
|
|
*
|
||
|
|
* ```php
|
||
|
|
* <?php
|
||
|
|
* foreach (Yii::$app->session->getAllFlashes() as $key => $message) {
|
||
|
|
* echo '<div class="alert alert-' . $key . '">' . $message . '</div>';
|
||
|
|
* } ?>
|
||
|
|
* ```
|
||
|
|
*
|
||
|
|
* With the above code you can use the [bootstrap alert][] classes such as `success`, `info`, `danger`
|
||
|
|
* as the flash message key to influence the color of the div.
|
||
|
|
*
|
||
|
|
* Note that if you use [[addFlash()]], `$message` will be an array, and you will have to adjust the above code.
|
||
|
|
*
|
||
|
|
* [bootstrap alert]: http://getbootstrap.com/components/#alerts
|
||
|
|
*
|
||
|
|
* @param bool $delete whether to delete the flash messages right after this method is called.
|
||
|
|
* If false, the flash messages will be automatically deleted in the next request.
|
||
|
|
* @return array flash messages (key => message or key => [message1, message2]).
|
||
|
|
* @see setFlash()
|
||
|
|
* @see addFlash()
|
||
|
|
* @see getFlash()
|
||
|
|
* @see hasFlash()
|
||
|
|
* @see removeFlash()
|
||
|
|
*/
|
||
|
|
public function getAllFlashes($delete = false)
|
||
|
|
{
|
||
|
|
$counters = $this->get($this->flashParam, []);
|
||
|
|
$flashes = [];
|
||
|
|
foreach (array_keys($counters) as $key) {
|
||
|
|
if (array_key_exists($key, $_SESSION)) {
|
||
|
|
$flashes[$key] = $_SESSION[$key];
|
||
|
|
if ($delete) {
|
||
|
|
unset($counters[$key], $_SESSION[$key]);
|
||
|
|
} elseif ($counters[$key] < 0) {
|
||
|
|
// mark for deletion in the next request
|
||
|
|
$counters[$key] = 1;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
unset($counters[$key]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$_SESSION[$this->flashParam] = $counters;
|
||
|
|
|
||
|
|
return $flashes;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Sets a flash message.
|
||
|
|
* A flash message will be automatically deleted after it is accessed in a request and the deletion will happen
|
||
|
|
* in the next request.
|
||
|
|
* If there is already an existing flash message with the same key, it will be overwritten by the new one.
|
||
|
|
* @param string $key the key identifying the flash message. Note that flash messages
|
||
|
|
* and normal session variables share the same name space. If you have a normal
|
||
|
|
* session variable using the same name, its value will be overwritten by this method.
|
||
|
|
* @param mixed $value flash message
|
||
|
|
* @param bool $removeAfterAccess whether the flash message should be automatically removed only if
|
||
|
|
* it is accessed. If false, the flash message will be automatically removed after the next request,
|
||
|
|
* regardless if it is accessed or not. If true (default value), the flash message will remain until after
|
||
|
|
* it is accessed.
|
||
|
|
* @see getFlash()
|
||
|
|
* @see addFlash()
|
||
|
|
* @see removeFlash()
|
||
|
|
*/
|
||
|
|
public function setFlash($key, $value = true, $removeAfterAccess = true)
|
||
|
|
{
|
||
|
|
$counters = $this->get($this->flashParam, []);
|
||
|
|
$counters[$key] = $removeAfterAccess ? -1 : 0;
|
||
|
|
$_SESSION[$key] = $value;
|
||
|
|
$_SESSION[$this->flashParam] = $counters;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds a flash message.
|
||
|
|
* If there are existing flash messages with the same key, the new one will be appended to the existing message array.
|
||
|
|
* @param string $key the key identifying the flash message.
|
||
|
|
* @param mixed $value flash message
|
||
|
|
* @param bool $removeAfterAccess whether the flash message should be automatically removed only if
|
||
|
|
* it is accessed. If false, the flash message will be automatically removed after the next request,
|
||
|
|
* regardless if it is accessed or not. If true (default value), the flash message will remain until after
|
||
|
|
* it is accessed.
|
||
|
|
* @see getFlash()
|
||
|
|
* @see setFlash()
|
||
|
|
* @see removeFlash()
|
||
|
|
*/
|
||
|
|
public function addFlash($key, $value = true, $removeAfterAccess = true)
|
||
|
|
{
|
||
|
|
$counters = $this->get($this->flashParam, []);
|
||
|
|
$counters[$key] = $removeAfterAccess ? -1 : 0;
|
||
|
|
$_SESSION[$this->flashParam] = $counters;
|
||
|
|
if (empty($_SESSION[$key])) {
|
||
|
|
$_SESSION[$key] = [$value];
|
||
|
|
} elseif (is_array($_SESSION[$key])) {
|
||
|
|
$_SESSION[$key][] = $value;
|
||
|
|
} else {
|
||
|
|
$_SESSION[$key] = [$_SESSION[$key], $value];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Removes a flash message.
|
||
|
|
* @param string $key the key identifying the flash message. Note that flash messages
|
||
|
|
* and normal session variables share the same name space. If you have a normal
|
||
|
|
* session variable using the same name, it will be removed by this method.
|
||
|
|
* @return mixed the removed flash message. Null if the flash message does not exist.
|
||
|
|
* @see getFlash()
|
||
|
|
* @see setFlash()
|
||
|
|
* @see addFlash()
|
||
|
|
* @see removeAllFlashes()
|
||
|
|
*/
|
||
|
|
public function removeFlash($key)
|
||
|
|
{
|
||
|
|
$counters = $this->get($this->flashParam, []);
|
||
|
|
$value = isset($_SESSION[$key], $counters[$key]) ? $_SESSION[$key] : null;
|
||
|
|
unset($counters[$key], $_SESSION[$key]);
|
||
|
|
$_SESSION[$this->flashParam] = $counters;
|
||
|
|
|
||
|
|
return $value;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Removes all flash messages.
|
||
|
|
* Note that flash messages and normal session variables share the same name space.
|
||
|
|
* If you have a normal session variable using the same name, it will be removed
|
||
|
|
* by this method.
|
||
|
|
* @see getFlash()
|
||
|
|
* @see setFlash()
|
||
|
|
* @see addFlash()
|
||
|
|
* @see removeFlash()
|
||
|
|
*/
|
||
|
|
public function removeAllFlashes()
|
||
|
|
{
|
||
|
|
$counters = $this->get($this->flashParam, []);
|
||
|
|
foreach (array_keys($counters) as $key) {
|
||
|
|
unset($_SESSION[$key]);
|
||
|
|
}
|
||
|
|
unset($_SESSION[$this->flashParam]);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a value indicating whether there are flash messages associated with the specified key.
|
||
|
|
* @param string $key key identifying the flash message type
|
||
|
|
* @return bool whether any flash messages exist under specified key
|
||
|
|
*/
|
||
|
|
public function hasFlash($key)
|
||
|
|
{
|
||
|
|
return $this->getFlash($key) !== null;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This method is required by the interface [[\ArrayAccess]].
|
||
|
|
* @param mixed $offset the offset to check on
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
public function offsetExists($offset)
|
||
|
|
{
|
||
|
|
$this->open();
|
||
|
|
|
||
|
|
return isset($_SESSION[$offset]);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This method is required by the interface [[\ArrayAccess]].
|
||
|
|
* @param int $offset the offset to retrieve element.
|
||
|
|
* @return mixed the element at the offset, null if no element is found at the offset
|
||
|
|
*/
|
||
|
|
public function offsetGet($offset)
|
||
|
|
{
|
||
|
|
$this->open();
|
||
|
|
|
||
|
|
return isset($_SESSION[$offset]) ? $_SESSION[$offset] : null;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This method is required by the interface [[\ArrayAccess]].
|
||
|
|
* @param int $offset the offset to set element
|
||
|
|
* @param mixed $item the element value
|
||
|
|
*/
|
||
|
|
public function offsetSet($offset, $item)
|
||
|
|
{
|
||
|
|
$this->open();
|
||
|
|
$_SESSION[$offset] = $item;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This method is required by the interface [[\ArrayAccess]].
|
||
|
|
* @param mixed $offset the offset to unset element
|
||
|
|
*/
|
||
|
|
public function offsetUnset($offset)
|
||
|
|
{
|
||
|
|
$this->open();
|
||
|
|
unset($_SESSION[$offset]);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* If session is started it's not possible to edit session ini settings. In PHP7.2+ it throws exception.
|
||
|
|
* This function saves session data to temporary variable and stop session.
|
||
|
|
* @since 2.0.14
|
||
|
|
*/
|
||
|
|
protected function freeze()
|
||
|
|
{
|
||
|
|
if ($this->getIsActive()) {
|
||
|
|
if (isset($_SESSION)) {
|
||
|
|
$this->frozenSessionData = $_SESSION;
|
||
|
|
}
|
||
|
|
$this->close();
|
||
|
|
Yii::info('Session frozen', __METHOD__);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Starts session and restores data from temporary variable
|
||
|
|
* @since 2.0.14
|
||
|
|
*/
|
||
|
|
protected function unfreeze()
|
||
|
|
{
|
||
|
|
if (null !== $this->frozenSessionData) {
|
||
|
|
|
||
|
|
YII_DEBUG ? session_start() : @session_start();
|
||
|
|
|
||
|
|
if ($this->getIsActive()) {
|
||
|
|
Yii::info('Session unfrozen', __METHOD__);
|
||
|
|
} else {
|
||
|
|
$error = error_get_last();
|
||
|
|
$message = isset($error['message']) ? $error['message'] : 'Failed to unfreeze session.';
|
||
|
|
Yii::error($message, __METHOD__);
|
||
|
|
}
|
||
|
|
|
||
|
|
$_SESSION = $this->frozenSessionData;
|
||
|
|
$this->frozenSessionData = null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set cache limiter
|
||
|
|
*
|
||
|
|
* @param string $cacheLimiter
|
||
|
|
* @since 2.0.14
|
||
|
|
*/
|
||
|
|
public function setCacheLimiter($cacheLimiter)
|
||
|
|
{
|
||
|
|
$this->freeze();
|
||
|
|
session_cache_limiter($cacheLimiter);
|
||
|
|
$this->unfreeze();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns current cache limiter
|
||
|
|
*
|
||
|
|
* @return string current cache limiter
|
||
|
|
* @since 2.0.14
|
||
|
|
*/
|
||
|
|
public function getCacheLimiter()
|
||
|
|
{
|
||
|
|
return session_cache_limiter();
|
||
|
|
}
|
||
|
|
}
|