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How to read database in html
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- 2024-04-11 09:28:461319browse
Answer: The database cannot be read using HTML itself, and a back-end programming language is required. Steps: Connect to the database. Execute queries to get data. Process query results. Display the fetched data in HTML.
Reading the database using HTML
HTML (Hypertext Markup Language) itself cannot interact directly with the database. To implement database operations in HTML, you need to use a back-end programming language, such as PHP, Python, or Java, and embed these back-end scripts in HTML.
The following is how to use HTML with a back-end language to read the database:
1. Connect to the database
Use mysqli_connect in PHP () Function establishes a connection with the database.
2. Execute the query
Use the mysqli_query() function to execute the SQL query to obtain the data.
3. Processing results
Use the mysqli_fetch_array() or mysqli_fetch_assoc() function to obtain data rows from the query results .
4. Display data in HTML
Use HTML elements (such as tables, lists, or paragraphs) to display data obtained from the database in an HTML document.
Code sample (PHP):
<code class="html"><!DOCTYPE html>
<html>
<body>
<?php
// 连接到数据库
$conn = mysqli_connect("localhost", "username", "password", "database");
// 执行查询
$result = mysqli_query($conn, "SELECT * FROM users");
// 获取数据行
while ($row = mysqli_fetch_assoc($result)) {
// 在 HTML 中显示数据
echo "<p><b>用户名：</b> " . $row['username'] . "</p>";
echo "<p><b>电子邮件：</b> " . $row['email'] . "</p>";
}
// 关闭数据库连接
mysqli_close($conn);
?>
</body>
</html></code>
Additional information:
- ##mysqli# for PHP ## The module provides functions for interacting with the MySQL database.
Other backend languages also provide libraries for interacting with various databases. - Ensure database connections and queries are executed on the HTML server side.
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