你的位置:首页 > ASP.net教程

[ASP.net教程]学习Slim Framework for PHP v3 (一)


  因为公司的项目用到是slim 框架,所以想把它学习一下。在公司用到是Slim2版本,现在官网已经到达 Slim3的版本了。官网地址:http://www.cnblogs.com/lmenglliren89php/。

  首先按照官网的教程,安装Slim:

    1.curl -sS https://getcomposer.org/installer | sudo php -- --install-dir=/usr/local/bin --filename=composer

    2.composer require slim/slim "^3.0"

  这样一个Slim就安装好了。还有Apache的DirectDocumentroot设置:AllowOverride All。

  同时它自带的Example的例子也是可以运行的,需要调整下文件夹的位置就好。

  

  如何才能理解一个框架呢?是很顺利的使用吗?还是从一步步去跟进去它的流程?

 

  我的思路是这样的,我把这个Example改成自己的项目,然后在不知道如何去的时候去深挖一下,不知道这样的逻辑是否正确,暂且就这样做吧。

  项目逻辑要求是这样的,页面提交数据--->>接收数据--->>存入数据库--->>记入日志--->>返回写入成功

  接收数据的route:

    
$app->get('/replace/', function ($request, $response, $args) {        Example\Module\Replace::instance()->setBody($request, $response);    });

  


 
  要说的是Slim就是基于route概念的,它将所有的request都转给不同的route,然后每个route完成功能,最后设定response,请求完毕。
  get方法就是去设定一个route,以后的‘replace’就会匹配到那个闭包函数中。
  
  而这个route是放在哪里呢?在APP.php中有个contianer。这个container是个什么东西呢,来看代码:
  
public function __construct($container = []){  if (is_array($container)) {    $container = new Container($container);  }  if (!$container instanceof ContainerInterface) {    throw new InvalidArgumentException('Expected a ContainerInterface');  }  $this->container = $container;}

  来看Container怎么做的:

public function __construct(array $values = []){  parent::__construct($values);  $userSettings = isset($values['settings']) ? $values['settings'] : [];  $this->registerDefaultServices($userSettings);}private function registerDefaultServices($userSettings){  $defaultSettings = $this->defaultSettings;  /**   * This service MUST return an array or an   * instance of \ArrayAccess.   *   * @return array|\ArrayAccess   */  $this['settings'] = function () use ($userSettings, $defaultSettings) {    return new Collection(array_merge($defaultSettings, $userSettings));  };  if (!isset($this['environment'])) {    /**     * This service MUST return a shared instance     * of \Slim\Interfaces\Http\EnvironmentInterface.     *     * @return EnvironmentInterface     */    $this['environment'] = function () {      return new Environment($_SERVER);    };  }  if (!isset($this['request'])) {    /**     * PSR-7 Request object     *     * @param Container $c     *     * @return ServerRequestInterface     */    $this['request'] = function ($c) {      return Request::createFromEnvironment($c->get('environment'));    };  }  if (!isset($this['response'])) {    /**     * PSR-7 Response object     *     * @param Container $c     *     * @return ResponseInterface     */    $this['response'] = function ($c) {      $headers = new Headers(['Content-Type' => 'text/html; charset=UTF-8']);      $response = new Response(200, $headers);      return $response->withProtocolVersion($c->get('settings')['httpVersion']);    };  }  if (!isset($this['router'])) {    /**     * This service MUST return a SHARED instance     * of \Slim\Interfaces\RouterInterface.     *     * @return RouterInterface     */    $this['router'] = function () {      return new Router;    };  }  if (!isset($this['foundHandler'])) {    /**     * This service MUST return a SHARED instance     * of \Slim\Interfaces\InvocationStrategyInterface.     *     * @return InvocationStrategyInterface     */    $this['foundHandler'] = function () {      return new RequestResponse;    };  }  if (!isset($this['errorHandler'])) {    /**     * This service MUST return a callable     * that accepts three arguments:     *     * 1. Instance of \Psr\Http\Message\ServerRequestInterface     * 2. Instance of \Psr\Http\Message\ResponseInterface     * 3. Instance of \Exception     *     * The callable MUST return an instance of     * \Psr\Http\Message\ResponseInterface.     *     * @param Container $c     *     * @return callable     */    $this['errorHandler'] = function ($c) {      return new Error($c->get('settings')['displayErrorDetails']);    };  }  if (!isset($this['notFoundHandler'])) {    /**     * This service MUST return a callable     * that accepts two arguments:     *     * 1. Instance of \Psr\Http\Message\ServerRequestInterface     * 2. Instance of \Psr\Http\Message\ResponseInterface     *     * The callable MUST return an instance of     * \Psr\Http\Message\ResponseInterface.     *     * @return callable     */    $this['notFoundHandler'] = function () {      return new NotFound;    };  }  if (!isset($this['notAllowedHandler'])) {    /**     * This service MUST return a callable     * that accepts three arguments:     *     * 1. Instance of \Psr\Http\Message\ServerRequestInterface     * 2. Instance of \Psr\Http\Message\ResponseInterface     * 3. Array of allowed HTTP methods     *     * The callable MUST return an instance of     * \Psr\Http\Message\ResponseInterface.     *     * @return callable     */    $this['notAllowedHandler'] = function () {      return new NotAllowed;    };  }  if (!isset($this['callableResolver'])) {    /**     * Instance of \Slim\Interfaces\CallableResolverInterface     *     * @param Container $c     *     * @return CallableResolverInterface     */    $this['callableResolver'] = function ($c) {      return new CallableResolver($c);    };  }}

  会看到这段代码就是初始化container中的router key,以后的route都加到这个里面就好了。

 $this['router'] = function () {   return new Router; };
 
 
只是能不加入自己的Key呢?

  第一次写,就先这样吧。