php循环插入数据库

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

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

    $data = [
        ['name' => 'Alice', 'age' => 25],
        ['name' => 'Bob', 'age' => 30],
        ['name' => 'Charlie', 'age' => 35]
    ];

    $stmt = $conn->prepare("INSERT INTO users (name, age) VALUES (:name, :age)");

    foreach ($data as $row) {
        $stmt->bindParam(':name', $row['name']);
        $stmt->bindParam(':age', $row['age']);
        $stmt->execute();
    }

    echo "New records created successfully";
} catch(PDOException $e) {
    echo "Error: " . $e->getMessage();
}

$conn = null;
?>

try {
    $conn->beginTransaction();
    foreach ($data as $row) {
        $stmt->bindParam(':name', $row['name']);
        $stmt->bindParam(':age', $row['age']);
        $stmt->execute();
    }
    $conn->commit();
    echo "New records created successfully";
} catch(PDOException $e) {
    $conn->rollBack();
    echo "Error: " . $e->getMessage();
}