获取带有绑定参数的PDO查询字符串而不执行它

<?php
// 连接到数据库
$dsn = 'mysql:host=localhost;dbname=mydatabase';
$username = 'myusername';
$password = 'mypassword';
$pdo = new PDO($dsn, $username, $password);

// 准备SQL查询
$sql = 'SELECT * FROM users WHERE id = :id';
$stmt = $pdo->prepare($sql);

// 绑定参数
$id = 1;
$stmt->bindParam(':id', $id, PDO::PARAM_INT);

// 获取带有绑定参数的查询字符串
$queryString = $stmt->queryString;

// 输出查询字符串
echo $queryString;
?>

$stmt->execute();