managing class dependencies and performing dependency injection. Dependency injection is a fancy phrase that essentially means this: class dependencies are "injected" into the class via the constructor or, in some cases, "setter" metho…
一.Ioc容器 某天,小J心血来潮,决定建造一艘星舰,这艘星舰要搭载"与众不同最时尚,开火肯定棒"的电磁炮.于是他写了一个星舰类: class ElectromagneticGun { public function fire() { echo 'da da da!'; } } class StarShip { protected $gun; public function __construct() { $gun = new ElectromagneticGun(); } } $po…