As the weather changes, people are paying more and more attention to the weather. In order to understand the weather conditions more conveniently, the PHP programming language provides a way to implement the weather query function. This article will introduce how to use PHP to implement the weather query function.

1. Obtain weather data

To implement the weather query function, you need to obtain weather data first. Generally speaking, weather data can be obtained by calling a third-party API. Here we take the aggregated data weather API as an example.

To use the aggregated data weather API, you need to register an account to obtain the API Key. Then send an HTTP request to obtain weather data in JSON format. The following is a sample code for obtaining weather data in Beijing:

$key = '**********'; // 替换成自己的API Key $city = '北京'; // 查询城市 $url = "http://apis.juhe.cn/simpleWeather/query?city=$city&key=$key"; $response = file_get_contents($url); $data = json_decode($response, true);

The PHP built-in function file_get_contents() is used to send a GET request and obtain the returned JSON data. Then use the json_decode() function to convert the JSON data into the PHP array $data.

2. Analyze weather data

After obtaining the weather data, we need to parse out the information we need. The following is a sample code for parsing weather data in Beijing:

$city = $data['city']; $today = $data['data']['forecast'][0]; $weather = $today['type']; $temperature = $today['high'] . '/' . $today['low']; $wind = $today['fengxiang'];

Here, the city name, weather of the day, temperature range of the day, wind direction of the day and other information are parsed.

3. Display weather information

After parsing the weather information, you can display it on the page. The following is a sample code to display weather information in Beijing:

 
天气
 
 
 
 

The embedded code of PHP is used to insert the parsed weather information into the HTML page.

4. Complete code example

Based on the above content, the following is a complete example code for implementing the weather query function in PHP:

         
 
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5. Summary

By using the PHP programming language and the aggregated data weather API, we can easily implement the weather query function. Whether you are making a website or an APP, you can use this function to provide users with a better experience.

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