# 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', '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(); ?> ``` >  > 請注意，每個SQL語句必須用分號隔開。 ## 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', 'john@example.com');"; $sql .= "INSERT INTO MyGuests (firstname, lastname, email) VALUES ('Mary', 'Moe', 'mary@example.com');"; $sql .= "INSERT INTO MyGuests (firstname, lastname, email) VALUES ('Julie', 'Dooley', 'julie@example.com')"; if (mysqli_multi_query($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', '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; ?> ``` ## 使用預處理語句 mysqli 擴展提供了第二種方式用于插入語句。 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); ??????? // 設置參數并執行 ??????? $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并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。