How to use PHP and UniApp to implement full-text search of data

How to use PHP and UniApp to implement full-text search of data

Introduction:
Full-text search refers to the technology of comprehensive search and matching of text, which can quickly retrieve relevant content based on keywords. In Web development, the full-text search function is often used in forums, blogs, e-commerce and other systems to improve user experience and enhance system functions. This article will introduce how to use PHP and UniApp technologies to implement the full-text search function of data, and provide corresponding code examples.

1. Use PHP to implement full-text search of data
In PHP, we can use full-text search database engines such as MySQL's full-text search function or use PHP's string manipulation functions to implement full-text search of data. The following is a sample code that uses the MySQL full-text search function:

Code example:

<?php
// 连接数据库
$servername = "localhost";
$username = "root";
$password = "123456";
$dbname = "mydb";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
  die("连接失败: " . $conn->connect_error);
}

// 获取搜索关键词
$keyword = $_GET['keyword'];

// 利用MySQL全文搜索查询相关结果
$sql = "SELECT * FROM articles WHERE MATCH (title, content) AGAINST ('$keyword' IN BOOLEAN MODE)";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
  // 输出搜索结果
  while($row = $result->fetch_assoc()) {
    echo "标题：" . $row["title"]. " - 内容：" . $row["content"]. "<br>";
  }
} else {
  echo "没有搜索到相关结果";
}

$conn->close();
?>

In the above sample code, we first connect to the database, and then use MySQL's Full-text search syntax performs database queries and outputs search results. It should be noted that the corresponding full-text search index (Full-Text Index) needs to be set to use the full-text search function.

2. Use UniApp to realize full-text search of data
UniApp is a cross-platform development framework that can develop applications running on multiple platforms (such as iOS, Android, Web, etc.) at the same time. In UniApp, we can use JavaScript to implement the full-text search function of data. The following is a sample code that uses JavaScript to implement full-text search of data:

Code sample:

export default {
  data() {
    return {
      keyword: '', // 搜索关键词
      articles: [], // 文章列表数据
      searchResult: [] // 搜索结果
    };
  },
  methods: {
    // 执行全文搜索操作
    doSearch() {
      const keyword = this.keyword;
      this.searchResult = this.articles.filter(article => {
        return article.title.includes(keyword) || article.content.includes(keyword);
      });

      if (this.searchResult.length == 0) {
        uni.showToast({
          title: '没有搜索到相关结果',
          icon: 'none'
        });
      }
    }
  },
  created() {
    // 获取文章列表数据
    // 此处省略获取数据的过程，假设已经将文章列表数据存在this.articles中
  }
}

In the above sample code, we obtain the user's search keywords and execute an array in the article list data Filter, store articles containing search keywords into this.searchResult, and determine whether to provide corresponding prompts based on the search results.

Conclusion:
By using PHP and UniApp technologies, we can realize the full-text search function of data. In PHP, we can use the full-text search function of the database to search for data; in UniApp, we can filter and match data through JavaScript to implement the search function. I hope the sample code in this article can help readers better understand and apply full-text search technology.

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