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();
}
}