# 4种PHP回调函数风格 ## 匿名函数 ~~~ $server->on('Request', function ($req, $resp) { echo "hello world"; }); ~~~ ## 类静态方法 ~~~ class A { static function test($req, $resp) { echo "hello world"; } } $server->on('Request', 'A::Test'); $server->on('Request', array('A', 'Test')); ~~~ ## 普通函数 ~~~ function my_onRequest($req, $resp) { echo "hello world"; } $server->on('Request', 'my_onRequest'); ~~~ ## 对象方法 ~~~ class A { function test($req, $resp) { echo "hello world"; } } $object = new A(); $server->on('Request', array($object, 'test')); ~~~