yeaha / owl Goto Github PK

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#0 D:\phpStudy\WWW\owl_test\mysite\vendor\yeaha\owl-mvc\src\Mvc\Router.php(230): Owl\Http\Exception::factory(404)
#1 D:\phpStudy\WWW\owl_test\mysite\vendor\yeaha\owl-mvc\src\Mvc\Router.php(166): Owl\Mvc\Router->respond(Object(Owl\Http\Request), Object(Owl\Http\Response))
#2 D:\phpStudy\WWW\owl_test\mysite\boot.php(59): Owl\Mvc\Router->execute(Object(Owl\Http\Request), Object(Owl\Http\Response))
#3 [internal function]: {closure}(Object(Owl\Http\Request), Object(Owl\Http\Response))
#4 D:\phpStudy\WWW\owl_test\mysite\vendor\yeaha\owl-core\src\Middleware.php(83): call_user_func_array(Object(Closure), Array)
#5 D:\phpStudy\WWW\owl_test\mysite\vendor\yeaha\owl-mvc\src\Application.php(110): Owl\Middleware->execute(Array)
#6 D:\phpStudy\WWW\owl_test\mysite\vendor\yeaha\owl-mvc\src\Application.php(92): Owl\Application->execute(Object(Owl\Http\Request), Object(Owl\Http\Response))
#7 D:\phpStudy\WWW\owl_test\mysite\index.php(7): Owl\Application->start()
#8 {main}

我的报这个错误

杨老师您好
最近在学习owl项目，看到在闭包中引用yield true语句，这里似乎理解的不太明白，在以前的学习中一直理解为在使用yield关键字后的语句不会被立即执行，而是放入某个缓冲区，等待下一次在while 或者foreach调用时启用，这时多个代码块会并发执行，来达到协程效果，其在cpu级处于快速切换那什么实现..然后看到这里yield true表示不太理解，您若有时间敬请赐教哦，感激不尽

 * $app->middleware(function($request, $response) {
 *     $start = microtime(true);
 *
 *     yield true;
 *
 *     $use_time = (microtime(true) - $start) * 1000;
 *     $response->withHeader('use-time', (int)$use_time.'ms');
 * });