Mysqli在While循环和For循环中插入

// 连接到数据库
$conn = new mysqli("localhost", "username", "password", "database");

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

// 获取数据源（例如数组）
$data = array(
    array("John", "Doe"),
    array("Jane", "Smith"),
    array("Bob", "Johnson")
);

// 遍历数据源并插入数据
foreach ($data as $row) {
    $firstName = $row[0];
    $lastName = $row[1];

    // 执行插入语句
    $sql = "INSERT INTO users (first_name, last_name) VALUES ('$firstName', '$lastName')";
    if ($conn->query($sql) === TRUE) {
        echo "插入成功";
    } else {
        echo "插入失败: " . $conn->error;
    }
}

// 关闭数据库连接
$conn->close();

// 连接到数据库
$conn = new mysqli("localhost", "username", "password", "database");

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

// 定义循环次数
$loopCount = 5;

// 执行循环并插入数据
for ($i = 0; $i < $loopCount; $i++) {
    $firstName = "User" . ($i + 1);
    $lastName = "Lastname" . ($i + 1);

    // 执行插入语句
    $sql = "INSERT INTO users (first_name, last_name) VALUES ('$firstName', '$lastName')";
    if ($conn->query($sql) === TRUE) {
        echo "插入成功";
    } else {
        echo "插入失败: " . $conn->error;
    }
}

// 关闭数据库连接
$conn->close();