mysql参数绑定in

<?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列表
$userIds = [1, 2, 3];

// 使用位置绑定
$stmt = $conn->prepare("SELECT * FROM users WHERE id IN (?, ?, ?)");
$stmt->bind_param("iii", $userIds[0], $userIds[1], $userIds[2]);

$stmt->execute();
$result = $stmt->get_result();

while ($row = $result->fetch_assoc()) {
    echo "ID: " . $row["id"] . " - Name: " . $row["name"] . "<br>";
}

$stmt->close();
$conn->close();
?>

$stmt = $conn->prepare("SELECT * FROM users WHERE id IN (?, ?, ?)");
$stmt->bind_param("iii", $userIds[0], $userIds[1], $userIds[2]);

$stmt->bind_param("iii", $userIds[0], $userIds[1], $userIds[2]);

$userIds = [1, 2, 3];
$placeholders = implode(', ', array_fill(0, count($userIds), '?'));

$stmt = $conn->prepare("SELECT * FROM users WHERE id IN ($placeholders)");
$stmt->bind_param(str_repeat("i", count($userIds)), ...$userIds);