PHP MySQL Update: Step-by-Step Guide

1 year ago
Sophia Anderson
1 minute

The usual method to update table data in PHP is to execute an UPDATE operation using SQL statements. Here is a simple example:

<?php
// 连接到数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接是否成功
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 更新表数据
$sql = "UPDATE users SET name='John' WHERE id=1";

if ($conn->query($sql) === TRUE) {
    echo "数据更新成功";
} else {
    echo "数据更新失败: " . $conn->error;
}

// 关闭连接
$conn->close();
?>

In the example above, we used the UPDATE statement to update the name field of the record with id 1 in the table named “users” to “John”. You can modify the SQL statement to update different tables and fields as needed.

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