php 获取插入的id

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 插入数据
$sql = "INSERT INTO table_name (column1, column2) VALUES ('value1', 'value2')";
if ($conn->query($sql) === TRUE) {
    $last_id = $conn->insert_id;
    echo "新记录插入成功，生成的ID是: " . $last_id;
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

$conn->close();

try {
    // 创建PDO实例
    $pdo = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    // 插入数据
    $sql = "INSERT INTO table_name (column1, column2) VALUES ('value1', 'value2')";
    $pdo->exec($sql);

    // 获取最后插入的ID
    $last_id = $pdo->lastInsertId();
    echo "新记录插入成功，生成的ID是: " . $last_id;
} catch(PDOException $e) {
    echo "数据库连接失败: " . $e->getMessage();
}

$pdo = null;

try {
    // 创建PDO实例
    $pdo = new PDO("pgsql:host=$servername;dbname=$dbname", $username, $password);
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    // 插入数据并返回ID
    $sql = "INSERT INTO table_name (column1, column2) VALUES ('value1', 'value2') RETURNING id";
    $stmt = $pdo->prepare($sql);
    $stmt->execute();
    $last_id = $stmt->fetchColumn();
    echo "新记录插入成功，生成的ID是: " . $last_id;
} catch(PDOException $e) {
    echo "数据库连接失败: " . $e->getMessage();
}

$pdo = null;

try {
    // 创建PDO实例
    $pdo = new PDO("sqlite:dbname=$dbname");

    // 插入数据
    $sql = "INSERT INTO table_name (column1, column2) VALUES ('value1', 'value2')";
    $pdo->exec($sql);

    // 获取最后插入的ID
    $last_id = $pdo->lastRowId();
    echo "新记录插入成功，生成的ID是: " . $last_id;
} catch(PDOException $e) {
    echo "数据库连接失败: " . $e->getMessage();
}

$pdo = null;