# PHP MySQL 插入數據 ## 使用 MySQLi 和 PDO 向 MySQL 插入數據 在創建完數據庫和表后，我們可以向表中添加數據。 以下為一些語法規則： * PHP 中 SQL 查詢語句必須使用引號 * 在 SQL 查詢語句中的字符串值必須加引號 * 數值的值不需要引號 * NULL 值不需要引號 INSERT INTO 語句通常用于向 MySQL 表添加新的記錄： ``` INSERT INTO table_name (column1, column2, column3,...) VALUES (value1, value2, value3,...) ``` 學習更多關于 SQL 知識，請查看我們的 [SQL 教程](/sql/sql-tutorial.html)。 在前面的幾個章節中我們已經創建了表 "MyGuests"，表字段有: "id", "firstname", "lastname", "email" 和 "reg_date"。 現在，讓我們開始向表填充數據。 >  > **注意：** 如果列設置 AUTO_INCREMENT (如 "id" 列) 或 TIMESTAMP (如 "reg_date" 列),，我們就不需要在 SQL 查詢語句中指定值； MySQL 會自動為該列添加值。 以下實例向 "MyGuests" 表添加了新的記錄: ## 實例 (MySQLi - 面向對象) ``` <?php $servername = "localhost"; $username = "username"; $password = "password"; $dbname = "myDB"; // 創建連接 $conn = new mysqli($servername, $username, $password, $dbname); // 檢測連接 if ($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(); ?> ``` ## 實例 (MySQLi - 面向過程) ``` <?php $servername = "localhost"; $username = "username"; $password = "password"; $dbname = "myDB"; // 創建連接 $conn = mysqli_connect($servername, $username, $password, $dbname); // 檢測連接 if (!$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); ?> ``` ## 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); ??? $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; ?> ```