[分享]掌握PHP MySQL，轻松实现数据库编程实战技巧

引言PHP与MySQL的结合是构建动态网站和应用程序的强大组合。掌握PHP MySQL数据库编程，能够帮助开发者高效地处理数据，实现复杂的业务逻辑。本文将详细介绍PHP MySQL数据库编程的实战技巧...

引言

PHP与MySQL的结合是构建动态网站和应用程序的强大组合。掌握PHP MySQL数据库编程，能够帮助开发者高效地处理数据，实现复杂的业务逻辑。本文将详细介绍PHP MySQL数据库编程的实战技巧，帮助读者轻松实现数据库操作。

一、PHP MySQL数据库连接

1. 使用mysqli扩展库连接数据库

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

2. 使用PDO扩展库连接数据库

<?php
$dsn = "mysql:host=localhost;dbname=myDB";
$username = "root";
$password = "password";
$options = [ PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
];
try { $conn = new PDO($dsn, $username, $password, $options);
} catch (PDOException $e) { die("连接失败: " . $e->getMessage());
}
?>

二、执行SQL语句

1. 查询数据

<?php
$sql = "SELECT id, name, email FROM users";
$result = $conn->query($sql);
while ($row = $result->fetch_assoc()) { echo "ID: " . $row["id"] . ", Name: " . $row["name"] . ", Email: " . $row["email"] . "<br>";
}
?>

2. 插入数据

<?php
$sql = "INSERT INTO users (name, email) VALUES ('John', 'john@example.com')";
if ($conn->query($sql) === TRUE) { echo "新记录插入成功";
} else { echo "Error: " . $sql . "<br>" . $conn->error;
}
?>

3. 更新数据

<?php
$sql = "UPDATE users SET email = 'john_doe@example.com' WHERE id = 1";
if ($conn->query($sql) === TRUE) { echo "记录更新成功";
} else { echo "Error: " . $sql . "<br>" . $conn->error;
}
?>

4. 删除数据

<?php
$sql = "DELETE FROM users WHERE id = 1";
if ($conn->query($sql) === TRUE) { echo "记录删除成功";
} else { echo "Error: " . $sql . "<br>" . $conn->error;
}
?>

三、使用预处理语句防止SQL注入

<?php
$stmt = $conn->prepare("INSERT INTO users (name, email) VALUES (?, ?)");
$stmt->bind_param("ss", $name, $email);
$name = "John Doe";
$email = "john_doe@example.com";
$stmt->execute();
echo "新记录插入成功";
?>

四、使用事务处理保证数据一致性

<?php
$conn->begin_transaction();
try { // 执行多个数据库操作 $conn->query("UPDATE users SET email = 'john_doe@example.com' WHERE id = 1"); $conn->query("INSERT INTO users (name, email) VALUES ('Jane', 'jane@example.com')"); $conn->commit(); echo "事务成功提交";
} catch (Exception $e) { $conn->rollback(); echo "事务回滚";
}
?>

五、总结

通过以上实战技巧，读者可以轻松掌握PHP MySQL数据库编程。在实际开发中，应根据具体需求选择合适的方法和技巧，提高代码质量和性能。