php循环调用mysql数据库

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

// 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);
}

// 假设我们有一个用户ID数组
$userIds = [1, 2, 3, 4, 5];

foreach ($userIds as $userId) {
    // 准备SQL语句
    $sql = "SELECT * FROM users WHERE id = ?";
    
    // 准备并绑定
    $stmt = $conn->prepare($sql);
    $stmt->bind_param("i", $userId);
    
    // 执行查询
    $stmt->execute();
    
    // 获取结果
    $result = $stmt->get_result();
    
    // 处理结果
    if ($result->num_rows > 0) {
        while($row = $result->fetch_assoc()) {
            echo "ID: " . $row["id"]. " - Name: " . $row["name"]. "<br>";
        }
    } else {
        echo "0 结果";
    }
    
    // 关闭语句
    $stmt->close();
}

// 关闭连接
$conn->close();
?>