PHP MySQL 插入多条数据

使用 MySQLi 和 PDO 向 MySQL 插入多条数据

mysqli_multi_query() 函数可用来执行多条SQL语句。

以下实例向 \”MyGuests\” 表添加了三条新的记录:

实例 (MySQLi – 面向对象)

<?php
$servername = \”localhost\”;
$username = \”username\”;
$password = \”password\”;
$dbname = \”myDB\”;

// 创建链接
$conn = new mysqli($servername, $username, $password, $dbname);
// 检查链接
if ($conn->connect_error) {
die(\”Connection failed: \” . $conn->connect_error);
}

$sql = \”INSERT INTO MyGuests (firstname, lastname, email)
VALUES (\’John\’, \’Doe\’, \’john@example.com\’);\”;
$sql .= \”INSERT INTO MyGuests (firstname, lastname, email)
VALUES (\’Mary\’, \’Moe\’, \’mary@example.com\’);\”;
$sql .= \”INSERT INTO MyGuests (firstname, lastname, email)
VALUES (\’Julie\’, \’Dooley\’, \’julie@example.com\’)\”;

if ($conn->multi_query($sql) === TRUE) {
echo \”New records created successfully\”;
} else {
echo \”Error: \” . $sql . \”<br>\” . $conn->error;
}

$conn->close();
?>

	请注意，每个SQL语句必须用分号隔开。

实例 (MySQLi – 面向过程)

<?php
$servername = \”localhost\”;
$username = \”username\”;
$password = \”password\”;
$dbname = \”myDB\”;

// 创建链接
$conn = mysqli_connect($servername, $username, $password, $dbname);
// 检查链接
if (!$conn) {
die(\”Connection failed: \” . mysqli_connect_error());
}

if (mysqli_multi_query($conn, $sql)) {
echo \”New records 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);

    // 开始事务
    $conn->beginTransaction();
    // SQL 语句
    $conn->exec(\”INSERT INTO MyGuests (firstname, lastname, email)
    VALUES (\’John\’, \’Doe\’, \’john@example.com\’)\”);
    $conn->exec(\”INSERT INTO MyGuests (firstname, lastname, email)
    VALUES (\’Mary\’, \’Moe\’, \’mary@example.com\’)\”);
    $conn->exec(\”INSERT INTO MyGuests (firstname, lastname, email)
    VALUES (\’Julie\’, \’Dooley\’, \’julie@example.com\’)\”);

    // commit the transaction
    $conn->commit();
    echo \”New records created successfully\”;
    }
catch(PDOException $e)
    {
    // roll back the transaction if something failed
    $conn->rollback();
    echo $sql . \”<br>\” . $e->getMessage();
    }

$conn = null;
?>

使用预处理语句

mysqli 扩展提供了第二种方式用于插入语句。

我们可以预处理语句及绑定参数。

mysql 扩展可以不带数据发送语句或查询到mysql数据库。你可以向列关联或 \”绑定\” 变量。

Example (MySQLi 使用预处理语句)

<?php
$servername = \”localhost\”;
$username = \”username\”;
$password = \”password\”;
$dbname = \”myDB\”;

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die(\”Connection failed: \” . $conn->connect_error);
} else {
$sql = \”INSERT INTO MyGuests VALUES(?, ?, ?)\”;

// 为 mysqli_stmt_prepare() 初始化 statement 对象
$stmt = mysqli_stmt_init($conn);

    //预处理语句
    if (mysqli_stmt_prepare($stmt, $sql)) {
        // 绑定参数
        mysqli_stmt_bind_param($stmt, \’sss\’, $firstname, $lastname, $email);

        // 设置参数并执行
        $firstname = \’John\’;
        $lastname = \’Doe\’;
        $email = \’john@example.com\’;
        mysqli_stmt_execute($stmt);

        $firstname = \’Mary\’;
        $lastname = \’Moe\’;
        $email = \’mary@example.com\’;
        mysqli_stmt_execute($stmt);

        $firstname = \’Julie\’;
        $lastname = \’Dooley\’;
        $email = \’julie@example.com\’;
        mysqli_stmt_execute($stmt);
    }
}
?>

我们可以看到以上实例中使用模块化来处理问题。我们可以通过创建代码块实现更简单的读取和管理。

注意参数的绑定。让我们看下 mysqli_stmt_bind_param() 中的代码：

mysqli_stmt_bind_param($stmt, \’sss\’, $firstname, $lastname, $email);

该函数绑定参数查询并将参数传递给数据库。第二个参数是 \”sss\” 。以下列表展示了参数的类型。 s 字符告诉 mysql 参数是字符串。

This argument may be one of four types: