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Tutorial on implementing location search function using PHP and Baidu Map API

PHPzOriginal: 2023-07-29 15:28:541684browse

Tutorial on using PHP and Baidu Map API to implement location search function

With the development of the Internet, map applications have become an indispensable part of people's daily lives. Baidu Maps is one of the more commonly used map services in China. It provides a rich API to facilitate developers to develop map-related functions. In this tutorial, we will use PHP and Baidu Map API to implement the location search function.

Step 1: Apply for Baidu Map API Key
First, we need to apply for an API key on the Baidu Map open platform. Visit the Baidu Map Open Platform URL (http://lbsyun.baidu.com/), register and log in. After logging in, enter the "Console", select "Create Application", and fill in the application name, application type, callback address and other relevant information. After the creation is completed, you can view the newly created application on the "My Application" page and obtain the API key.

Step 2: Introduce Baidu Map API
In the PHP development environment, we need to introduce Baidu Map API into the code. First, you can create a folder named "baiduMap" (you can name it according to your personal preference) in the directory where the project is located, then download the JavaScript file of Baidu Map API and place it in the "baiduMap" folder . Use the following code in the PHP file to introduce the Baidu Map API:

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>地点搜索</title>
    <script type="text/javascript" src="baiduMap/bmap.js"></script>
  </head>
  <body>
  </body>
</html>

Please make sure to place the above code in the 6c04bd5ca3fcae76e30b72ad730ca86d tag of the PHP file.

Step 3: Write a location search form
Next, we need to write a location search form on the page to facilitate users to enter search content. You can add the following code in the 6c04bd5ca3fcae76e30b72ad730ca86d tag:

<h2>地点搜索</h2>
<form action="" method="POST">
  <input type="text" name="keyword" placeholder="请输入要搜索的地点">
  <input type="submit" value="搜索">
</form>

The above code will display a simple form containing a search box and search button on the page.

Step 4: Process user input
When the user clicks the search button, we need to process the search content entered by the user. In the PHP file, use the following code to get the form data:

<?php
if(isset($_POST['keyword']) && !empty($_POST['keyword'])){
  $keyword = $_POST['keyword'];
}
?>

The above code will check whether there is content entered in the form, and if it exists and is not empty, the data will be stored in the variable $keyword.

Step 5: Call Baidu Map API to search
After obtaining the search content entered by the user, we will use Baidu Map API to conduct location search. In the PHP file, use the following code to call the API to search:

<?php
if(isset($_POST['keyword']) && !empty($_POST['keyword'])){
  $keyword = $_POST['keyword'];
  
  $url = "http://api.map.baidu.com/place/v2/search?query=".$keyword."&region=全国&output=json&ak=YOUR_API_KEY";
  
  $result = file_get_contents($url);
  
  $data = json_decode($result, true);
  
  // 显示搜索结果
  foreach($data['results'] as $item){
    echo $item['name']."<br>";
  }
}
?>

The above code adds the search content entered by the user to the API request URL, and uses the file_get_contents() function to obtain the returned results. Then, the returned results are parsed into array format and the search results are displayed in a loop.

Please note that YOUR_API_KEY in the above code needs to be replaced with the API key you applied for in step 1.

Step 6: Complete PHP Code Example
Below is the complete code example of the entire PHP file:

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>地点搜索</title>
    <script type="text/javascript" src="baiduMap/bmap.js"></script>
  </head>
  <body>
    <h2>地点搜索</h2>
    <form action="" method="POST">
      <input type="text" name="keyword" placeholder="请输入要搜索的地点">
      <input type="submit" value="搜索">
    </form>
    
    <?php
    if(isset($_POST['keyword']) && !empty($_POST['keyword'])){
      $keyword = $_POST['keyword'];
      
      $url = "http://api.map.baidu.com/place/v2/search?query=".$keyword."&region=全国&output=json&ak=YOUR_API_KEY";
      
      $result = file_get_contents($url);
      
      $data = json_decode($result, true);
      
      // 显示搜索结果
      foreach($data['results'] as $item){
        echo $item['name']."<br>";
      }
    }
    ?>
  </body>
</html>

Please make sure to replace YOUR_API_KEY in the code with the one you requested in Step 1 API key.

Using the above tutorial, we can easily use PHP and Baidu Map API to implement the location search function. You can also further expand the code according to your own needs, add more map functions, and provide a better user experience. Hope this tutorial helps you!

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