PHP MySQL 插入数据

在创建完数据库和表后，我们可以向表中添加数据。

以下为一些语法规则：

PHP 中 SQL 查询语句必须使用引号

在 SQL 查询语句中的字符串值必须加引号

数值的值不需要引号

NULL 值不需要引号

INSERT INTO 语句通常用于向 MySQL 表添加新的记录：

INSERT INTO table_name (column1, column2, column3,...)        

VALUES (value1, value2, value3,...)

学习更多关于 SQL 知识，请查看我们的 SQL 教程。

现在，让我们开始向表填充数据。

注意：如果列设置 AUTO_INCREMENT (如 "id" 列) 或 TIMESTAMP (如 "reg_date" 列),我们就不需要在 SQL 查询语句中指定值； MySQL 会自动为该列添加值。

以下实例向 "MyGuests" 表添加了新的记录:

实例 (MySQLi - 面向对象)

<?php

$servername = "localhost";

$username = "username";

$password = "password";

$dbname = "myDB";

// 创建连接

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

// 检测连接

if ($conn->connect_error) {

    die("Connection failed: " . $conn->connect_error);

}

$sql = "INSERT INTO MyGuests (firstname, lastname, email)

VALUES ('John', 'Doe', 'john@example.com')";

if ($conn->query($sql) === TRUE) {

    echo "New record created successfully";

} else {

    echo "Error: " . $sql . "<br>" . $conn->error;

}

$conn->close();

?>

实例 (MySQLi - 面向过程)

<?php

$servername = "localhost";

$username = "username";

$password = "password";

$dbname = "myDB";

// 创建连接

$conn = mysqli_connect($servername, $username, $password, $dbname);

// 检测连接

if (!$conn) {

    die("Connection failed: " . mysqli_connect_error());

}

$sql = "INSERT INTO MyGuests (firstname, lastname, email)

VALUES ('John', 'Doe', 'john@example.com')";

if (mysqli_query($conn, $sql)) {

    echo "New record created successfully";

} else {

    echo "Error: " . $sql . "<br>" . mysqli_error($conn);

}

mysqli_close($conn);

?>

实例 (PDO)

<?php

$servername = "localhost";

$username = "username";

$password = "password";

$dbname = "myDBPDO";

try {

    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);

    // set the PDO error mode to exception

    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    $sql = "INSERT INTO MyGuests (firstname, lastname, email)

    VALUES ('John', 'Doe', 'john@example.com')";

    // use exec() because no results are returned

    $conn->exec($sql);

    echo "New record created successfully";

    }

catch(PDOException $e)

    {

    echo $sql . "<br>" . $e->getMessage();

    }

$conn = null;

?>