關於laravel 自動載入和依賴注入、服務容器、服務提供者的理解--1
阿新 • • 發佈:2019-01-03
class Container
{
protected $binds;
protected $instances;
public function bind($abstract, $concrete)
{
if ($concrete instanceof Closure) {
$this->binds[$abstract] = $concrete;
} else {
$this->instances[$abstract] = $concrete;
}
}
public function make($abstract, $parameters = [])
{
if (isset($this->instances[$abstract])) {
return $this->instances[$abstract];
}
array_unshift($parameters, $this);
return call_user_func_array($this->binds[$abstract], $parameters);
}
}
// 建立一個容器(後面稱作超級工廠)
$container = new Container;
// 向該 超級工廠新增超人的生產指令碼
$container->bind('superman', function($container, $moduleName) {
return new Superman($container->make($moduleName)); //重點注意這裡 $container->make($moduleName)就是IoC模式中 向Superman類注入的例項
});
// 向該 超級工廠新增超能力模組的生產指令碼
$container->bind('xpower', function($container) {
return new XPower;
});
// 同上
$container->bind('ultrabomb', function($container) {
return new UltraBomb;
});
// ****************** 華麗麗的分割線 **********************
// 開始啟動生產
$superman_1 = $container->make('superman', 'xpower');
$superman_2 = $container->make('superman', 'ultrabomb');
$superman_3 = $container->make('superman', 'xpower');
// ...隨意新增