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控制器访问与参数解析类以及api天气接口实现输入城市查询天气
Jason Pu?
Original
654 people have browsed it

一.控制器访问与参数解析类

已知有一个控制器类如下：

  1. class UserController 
  2. {
  3.     public function show($id,$name)
  4.     {
  5.         return 'Hello '.$name . ', id = ' . $id;
  6.     }
  7. }

如果需要用url参数调用这个类，我们一般会使用

  1. “http://www.test.com/Controller.php?user=show&id=10&name=admin”

，这种URL对于搜索引擎非常不友好的。很多搜索引擎收录的时候，都会忽略Query String之后的内容，为此我们需要写一个类从url的pathinfo中解析出控制器和方法

  1. //目标：将URL中的控制器和方法以及参数解析出来
  2. class GetControllerInfo
  3. {
  4.     public $pathinfo;
  6.     public function __construct($original_path_info)
  7.     {
  8.         $this->pathinfo = array_filter(explode('/', $original_path_info));
  9.     }
  11.     //解析控制器
  12.     public function getController()
  13.     {
  14.         return ucfirst($this->pathinfo[1]) . "Controller";
  15.     }
  17.     //解析控制器中的方法名称
  18.     public function getMethod()
  19.     {
  20.         return $this->pathinfo[2];
  21.     }
  23.     //解析参数
  24.     public function getParameters()
  25.     {
  26.         $params_array = [];
  27.         $params = array_slice($this->pathinfo, 2);
  28.         for ($i = 0; $i < count($params); $i += 2) {
  29.             if (isset($params[$i + 1])) {
  30.                 $params_array[$params[$i]] = $params[$i + 1];
  31.             }
  32.         }
  33.         return $params_array;
  34.     }
  35. }

使用url：

  1. http://localhost:3000/0305homework/Controller.php/user/show/id/10/name/admin

在Controller页面引入解析类：

  1. require 'parameter_parse.php';
  3. $userparameter = new GetControllerInfo($_SERVER['PATH_INFO']);
  5. $controller = $userparameter->getController();
  7. $method = $userparameter->getMethod();
  9. $parameter = $userparameter->getParameters();
  11. // echo $parameter;
  12. // var_dump($controller);
  13. // var_dump($method);
  14. // var_dump($parameter);
  16. // 请求数据：http://localhost:3000/0305homework/Controller.php/user/show/id/10/name/admin
  18. echo call_user_func_array([(new $controller),$method],$parameter);

实验结果：

二.利用api让用户输入城市并显示天气预报

1.html部分：

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  6.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  7.     <title>Document</title>
  8. </head>
  9. <body>
  10.     <form action="" method="get">
  11.         输入所在城市：<input type="text" name="city" >
  12.         <input type="submit">
  13.     </form>
  14.     <div class="show">
  16.     <table border="1">
  17.         <thead>所在城市天气预报</thead>
  18.         <tbody>
  19.             <tr>
  20.                 <th>所在城市</th>
  21.                 <th>当前温度</th>
  22.                 <th>当前湿度</th>
  23.                 <th>当前天气</th>
  24.                 <th>当前风向</th>
  25.                 <th>当前风力</th>
  26.                 <th>当前空气质量</th>
  27.             </tr>
  28.             <tr>
  29.                 <td><?=$data['city']?></td>
  30.                 <td><?=$data["realtime"]["temperature"]?></td>
  31.                 <td><?=$data["realtime"]["humidity"]?></td>
  32.                 <td><?=$data["realtime"]["info"]?></td>
  33.                 <td><?=$data["realtime"]["direct"]?></td>
  34.                 <td><?=$data["realtime"]["power"]?></td>
  35.                 <td><?=$data["realtime"]["aqi"]?></td>
  36.             </tr>
  37.         </tbody>
  38.     </table>
  39.     </div>
  40. </body>
  41. </html>

php部分：

  1. <?php
  2. header('content-type:text/html;charset=utf-8');
  3. header('Access-Control-Allow-Origin:*');
  4. // 请求的接口URL
  5. $apiUrl = 'http://apis.juhe.cn/simpleWeather/query';
  6. // 请求参数
  7. $params = [
  8.     'city' => $_GET['city'], // 要查询的城市
  9.     'key' => '43ecc4a52161a4d8c176f3087f79786c'
  10. ];
  11. $paramsString = http_build_query($params);
  13. // 发起接口网络请求
  14. $response = juheHttpRequest($apiUrl, $paramsString , 1);
  15. $result = json_decode($response, true);
  16. if ($result) {
  17.     $errorCode = $result['error_code'];
  18.     if ($errorCode == 0) {
  19.         // 获取返回的天气相关信息，具体根据业务实际逻辑调整修改
  20.         $data = $result['result'];
  22.     } else {
  23.         // 请求异常
  24.         echo  "请求异常:{$errorCode}_{$result["reason"]}".PHP_EOL;
  25.         // echo json_encode("请求异常:{$errorCode}_{$result["reason"]}");
  26.         // echo "callback(".$data.")";
  27.     }
  28. } else {
  29.     // 可能网络异常等问题，无法正常获得相应内容，业务逻辑可自行修改
  30.     echo "请求异常".PHP_EOL;
  31. }
  33. /**
  34.  * 发起网络请求函数
  35.  * @param $url 请求的URL
  36.  * @param bool $params 请求的参数内容
  37.  * @param int $ispost 是否POST请求
  38.  * @return bool|string 返回内容
  39.  */
  40. function juheHttpRequest($url, $params = false, $ispost = 0)
  41. {
  42.     $httpInfo = array();
  43.     $ch = curl_init();
  45.     curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
  46.     curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.118 Safari/537.36');
  47.     curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 3);
  48.     curl_setopt($ch, CURLOPT_TIMEOUT, 12);
  49.     curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  50.     if ($ispost) {
  51.         curl_setopt($ch, CURLOPT_POST, true);
  52.         curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
  53.         curl_setopt($ch, CURLOPT_URL, $url);
  54.     } else {
  55.         if ($params) {
  56.             curl_setopt($ch, CURLOPT_URL, $url.'?'.$params);
  57.         } else {
  58.             curl_setopt($ch, CURLOPT_URL, $url);
  59.         }
  60.     }
  61.     $response = curl_exec($ch);
  62.     if ($response === FALSE) {
  63.         // echo "cURL Error: ".curl_error($ch);
  64.         return false;
  65.     }
  66.     $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
  67.     $httpInfo = array_merge($httpInfo, curl_getinfo($ch));
  68.     curl_close($ch);
  69.     return $response;
  70. }
  71. ?>

随机输入一个城市名测试：

Correcting teacher：天蓬老师天蓬老师

Correction status：qualified

Teacher's comments：代码很清晰，不错嘛
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