PHP MySQL 插入多條數據

使用 MySQLi 和 PDO 向 MySQL 插入多條數據

mysqli_multi_query() 函數可用來執行多條SQL語句。

以下實例向 "MyGuests" 表添加了三條新的記錄:

實例 (MySQLi - 面向對象)

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

// 創建鏈接
$conn = new mysqli($servername, $username, $password, $dbname);
// 檢查鏈接
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 

$sql = "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('John', 'Doe', '[email protected]');";
$sql .= "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('Mary', 'Moe', '[email protected]');";
$sql .= "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('Julie', 'Dooley', '[email protected]')";

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

$conn->close();
?>

實例 (MySQLi - 面向過程)

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

// 創建鏈接
$conn = mysqli_connect($servername, $username, $password, $dbname);
// 檢查鏈接
if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}

$sql = "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('John', 'Doe', '[email protected]');";
$sql .= "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('Mary', 'Moe', '[email protected]');";
$sql .= "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('Julie', 'Dooley', '[email protected]')";

if (mysqli_multi_query($conn, $sql)) {
    echo "New records created successfully";
} else {
    echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}

mysqli_close($conn);
?>

實例 (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);

    // 開始事務
    $conn->beginTransaction();
    // SQL 語句
    $conn->exec("INSERT INTO MyGuests (firstname, lastname, email) 
    VALUES ('John', 'Doe', '[email protected]')");
    $conn->exec("INSERT INTO MyGuests (firstname, lastname, email) 
    VALUES ('Mary', 'Moe', '[email protected]')");
    $conn->exec("INSERT INTO MyGuests (firstname, lastname, email) 
    VALUES ('Julie', 'Dooley', '[email protected]')");

    // 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;
?>

使用預處理語句

mysqli 擴展提供了第二種方式用於插入語句。

我們可以預處理語句及綁定參數。

mysql 擴展可以不帶數據發送語句或查詢到mysql數據庫。 你可以向列關聯或 "綁定" 變量。

Example (MySQLi 使用預處理語句)

<?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(?, ?, ?)";

    // 為 mysqli_stmt_prepare() 初始化 statement 對象
    $stmt = mysqli_stmt_init($conn);

    //預處理語句
    if (mysqli_stmt_prepare($stmt, $sql)) {
        // 綁定參數
        mysqli_stmt_bind_param($stmt, 'sss', $firstname, $lastname, $email);

        // 設置參數並執行
        $firstname = 'John';
        $lastname = 'Doe';
        $email = '[email protected]';
        mysqli_stmt_execute($stmt);

        $firstname = 'Mary';
        $lastname = 'Moe';
        $email = '[email protected]';
        mysqli_stmt_execute($stmt);

        $firstname = 'Julie';
        $lastname = 'Dooley';
        $email = '[email protected]';
        mysqli_stmt_execute($stmt);
    }
}
?>

我們可以看到以上實例中使用模塊化來處理問題。我們可以通過創建代碼塊實現更簡單的讀取和管理。

注意參數的綁定。讓我們看下 mysqli_stmt_bind_param() 中的代碼：

mysqli_stmt_bind_param($stmt, 'sss', $firstname, $lastname, $email);

該函數綁定參數查詢並將參數傳遞給數據庫。第二個參數是 "sss" 。以下列表展示了參數的類型。 s 字符告訴 mysql 參數是字符串。

This argument may be one of four types:

• i - integer
• d - double
• s - string
• b - BLOB

每個參數必須指定類型，來保證數據的安全性。通過類型的判斷可以減少SQL注入漏洞帶來的風險。