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现代PHP很快！它具有多项性能功能，例如OPCache，JIT和其他编译阶段的改进，可针对许多PHP应用程序进行智能优化。
检查OPCode是确保PHP可以进行最佳优化的简便方法。使用列出的OPCode，可以更清楚地了解给定的PHP代码段是否采用了执行预期任务所需的最短数量的OPCode。
目前，PHP有30多个这样的函数，它们使用特殊的OPCode或内联以提高性能。
展示这种效果的一个例子是 strlen函数。它返回给定字符串的长度，PHP尝试抢先优化。
if (strlen('Test') < 2) {
echo "Test";
}在此代码段中，该strlen函数在静态字符串文字上调用，并且PHP可以完全消除此块，因为Test字符串的长度是固定的，并且比较值也是静态值。
使用OPCode dump可以更好地揭示这一点。
优化之前
php // 1 普通函数
call_user_func('my_function');
// 2类的静态方法
call_user_func(['MyClass', 'myCallbackMethod']);
// 3对象方法
call_user_func([new MyClass(), 'myCallbackMethod']);
//4类的静态方法(2)
call_user_func('MyClass::myCallbackMethod');
//5匿名函数
call_user_func(function(){echo '匿名函数';});
//6箭头函数
call_user_func(fn() =>print('箭头函数'));
//7相对关系
call_user_func(array('B', 'parent::who'));
// 8: Objects implementing __invoke can be used as callables
class C {
public function __invoke($name) …PSR-7 is pretty close to completion. PSR-7 is a new ‘PHP standard recommendation’, put out by the PHP-FIG group, of which I’m a member of.
It describes how to create PHP representations of a HTTP Request and a HTTP response.
Slim supports PSR-7 interfaces for its Request and Response objects. This makes Slim flexible because it can use any PSR-7 implementation. For example, a Slim application route does not have to return an instance of \Slim\Http\Response. It could, for …
PSR-7 contains interfaces for HTTP messages. These are like Symfony Kernel's Request and Response interfaces. Having these new interfaces would be great for the PHP community but there's a couple of issues with their current state that I'm not happy …
Sou o maluco das etimologias, acho legal tentar entender a origem da palavra e que significado ela carrega, no caso de middleware o middle vem de "meio", "entre" e o ware é usado pra substantivos não-contáveis que …
I’ve been thinking a lot about immutable objects lately. Yegor Bugayenko claims that Objects Should Be Immutable and PSR-7: HTTP message interfaces are designed to be immutable. #
…Messages are values where the identity is the aggregate of all
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