15 行程式碼實現單例模式依賴注入容器加靜態代理

<?php
namespace app;
static $container = [];
function app($class) {
    global $container;
    if (empty($container[$class])) $container[$class] = new $class();
    return $container[$class];
}
abstract class Facade {
    abstract public static function getFacadeClass(): string;
    public static function __callStatic($name, $arguments) {
        $obj = app(static::getFacadeClass());
        return $obj->$name(...$arguments);
    }
}

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