session会话 · PHP笔记

# [获取session对象](https://www.workerman.net/doc/workerman/http/session.html#%E8%8E%B7%E5%8F%96session%E5%AF%B9%E8%B1%A1) ~~~php $session = $request->session(); ~~~ **例子** ~~~php use Workerman\Worker; use Workerman\Connection\TcpConnection; use Workerman\Protocols\Http\Request; require_once __DIR__ . '/vendor/autoload.php'; $worker = new Worker('http://0.0.0.0:8080'); $worker->onMessage = function(TcpConnection $connection, Request $request) { $session = $request->session(); $session->set('name', 'tome'); $connection->send($session->get('name')); }; // 运行worker Worker::runAll(); ~~~ **注意事项** * session必须在`$connection->send()`调用之前操作。 * session在对象销毁时会自动保存修改，所以不要把`$request->session()`返回的对象保存在全局数组或者类成员中导致session无法保存。 * session默认存储在磁盘文件中，如果想要更好的性能建议使用redis。 ## [获取所有session数据](https://www.workerman.net/doc/workerman/http/session.html#%E8%8E%B7%E5%8F%96%E6%89%80%E6%9C%89session%E6%95%B0%E6%8D%AE) ~~~php $session = $request->session(); $all = $session->all(); ~~~ 返回的是一个数组。如果没有任何session数据，则返回一个空数组。 **例子** ~~~php use Workerman\Worker; use Workerman\Connection\TcpConnection; use Workerman\Protocols\Http\Request; require_once __DIR__ . '/vendor/autoload.php'; $worker = new Worker('http://0.0.0.0:8080'); $worker->onMessage = function(TcpConnection $connection, Request $request) { $session = $request->session(); $session->set('name', 'tom'); $connection->send(var_export($session->all(), true)); }; // 运行worker Worker::runAll(); ~~~ ## [获取session中某个值](https://www.workerman.net/doc/workerman/http/session.html#%E8%8E%B7%E5%8F%96session%E4%B8%AD%E6%9F%90%E4%B8%AA%E5%80%BC) ~~~php $session = $request->session(); $name = $session->get('name'); ~~~ 如果数据不存在则返回null。你也可以给get方法第二个参数传递一个默认值，如果session数组中没找到对应值则返回默认值。例如： ~~~php $session = $request->session(); $name = $session->get('name', 'tom'); ~~~ **例子** ~~~php use Workerman\Worker; use Workerman\Connection\TcpConnection; use Workerman\Protocols\Http\Request; require_once __DIR__ . '/vendor/autoload.php'; $worker = new Worker('http://0.0.0.0:8080'); $worker->onMessage = function(TcpConnection $connection, Request $request) { $session = $request->session(); $connection->send($session->get('name', 'tom')); }; // 运行worker Worker::runAll(); ~~~ ## [存储session](https://www.workerman.net/doc/workerman/http/session.html#%E5%AD%98%E5%82%A8session) 存储某一项数据时用set方法。 ~~~php $session = $request->session(); $session->set('name', 'tom'); ~~~ set没有返回值，session对象销毁时session会自动保存。当存储多个值时使用put方法。 ~~~php $session = $request->session(); $session->put(['name' => 'tom', 'age' => 12]); ~~~ 同样的，put也没有返回值。 **例子** ~~~php use Workerman\Worker; use Workerman\Connection\TcpConnection; use Workerman\Protocols\Http\Request; require_once __DIR__ . '/vendor/autoload.php'; $worker = new Worker('http://0.0.0.0:8080'); $worker->onMessage = function(TcpConnection $connection, Request $request) { $session = $request->session(); $session->set('name', 'tom'); $connection->send($session->get('name')); }; // 运行worker Worker::runAll(); ~~~ ## [删除session数据](https://www.workerman.net/doc/workerman/http/session.html#%E5%88%A0%E9%99%A4session%E6%95%B0%E6%8D%AE) 删除某个或者某些session数据时用`forget`方法。 ~~~php $session = $request->session(); // 删除一项 $session->forget('name'); // 删除多项 $session->forget(['name', 'age']); ~~~ 另外系统提供了delete方法，与forget方法区别是，delete只能删除一项。 ~~~php $session = $request->session(); // 等同于 $session->forget('name'); $session->delete('name'); ~~~ **例子** ~~~php use Workerman\Worker; use Workerman\Connection\TcpConnection; use Workerman\Protocols\Http\Request; require_once __DIR__ . '/vendor/autoload.php'; $worker = new Worker('http://0.0.0.0:8080'); $worker->onMessage = function(TcpConnection $connection, Request $request) { $request->session()->forget('name'); $connection->send('ok'); }; // 运行worker Worker::runAll(); ~~~ ## [获取并删除session某个值](https://www.workerman.net/doc/workerman/http/session.html#%E8%8E%B7%E5%8F%96%E5%B9%B6%E5%88%A0%E9%99%A4session%E6%9F%90%E4%B8%AA%E5%80%BC) ~~~php $session = $request->session(); $name = $session->pull('name'); ~~~ 效果与如下代码相同 ~~~php $session = $request->session(); $value = $session->get($name); $session->delete($name); ~~~ 如果对应session不存在，则返回null。 **例子** ~~~php use Workerman\Worker; use Workerman\Connection\TcpConnection; use Workerman\Protocols\Http\Request; require_once __DIR__ . '/vendor/autoload.php'; $worker = new Worker('http://0.0.0.0:8080'); $worker->onMessage = function(TcpConnection $connection, Request $request) { $connection->send($request->session()->pull('name')); }; // 运行worker Worker::runAll(); ~~~ ## [删除所有session数据](https://www.workerman.net/doc/workerman/http/session.html#%E5%88%A0%E9%99%A4%E6%89%80%E6%9C%89session%E6%95%B0%E6%8D%AE) ~~~php $request->session()->flush(); ~~~ 没有返回值，session对象销毁时session会自动从存储中删除。 **例子** ~~~php use Workerman\Worker; use Workerman\Connection\TcpConnection; use Workerman\Protocols\Http\Request; require_once __DIR__ . '/vendor/autoload.php'; $worker = new Worker('http://0.0.0.0:8080'); $worker->onMessage = function(TcpConnection $connection, Request $request) { $request->session()->flush(); $connection->send('ok'); }; // 运行worker Worker::runAll(); ~~~ ## 判断对应session数据是否存在 ~~~php $session = $request->session(); $has = $session->has('name'); ~~~ 以上当对应的session不存在或者对应的session值为null时返回false，否则返回true。 ~~~ $session = $request->session(); $has = $session->exists('name'); ~~~ 以上代码也是用来判断session数据是否存在，区别时当对应的session项值为null时，也返回true。