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由于 PHP 5.6 不支持 throw 关键字后面直接使用 \InvalidArgumentException 这种命名空间方式,我们需要对其进行调整。以下是针对 PHP 5.6 版本兼容的代码示例:
// application/Interfaces/LogisticsCompany.php namespace app\Interfaces; interface LogisticsCompany { public function placeOrder($orderInfo); public function getSupportedDestinations(); } // application/Service/Logistics/CompanyA.php namespace app\Service\Logistics; use app\Interfaces\LogisticsCompany; class CompanyA implements LogisticsCompany { // 实现下单方法 public function placeOrder($orderInfo) { // 具体的下单逻辑... } // 实现获取支持目的地方法 public function getSupportedDestinations() { // 具体的获取目的地逻辑... } } // 同样方式为其他物流公司创建类,例如:CompanyB, CompanyC 等 // application/Service/LogisticsFactory.php namespace app\Service; class LogisticsFactory { private static $companies = array( 'company_a' => 'app\\Service\\Logistics\\CompanyA', 'company_b' => 'app\\Service\\Logistics\\CompanyB', // 更多物流公司... ); public static function create($name) { if (!isset(self::$companies[$name])) { trigger_error("Invalid logistics company: {$name}", E_USER_ERROR); return null; // 或者抛出一个在PHP 5.6中可用的异常,如自定义异常或使用trigger_error } $className = self::$companies[$name]; if (!class_exists($className)) { trigger_error("Class not found: {$className}", E_USER_ERROR); return null; } return new $className(); } } // application/controller/YourController.php namespace app\controller; use app\Interfaces\LogisticsCompany; use app\Service\LogisticsFactory; class YourController { public function placeOrderAction() { $logisticsCompany = LogisticsFactory::create('company_a'); if (!$logisticsCompany) { // 处理错误情况,例如返回错误信息或者跳转到错误页面 return; } $orderInfo = []; // 假设这是订单信息 $logisticsCompany->placeOrder($orderInfo); // 获取支持的目的地 $destinations = $logisticsCompany->getSupportedDestinations(); } }
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