除錯程式碼如下：

<?php

//mysql
$servername = "localhost";
$username = "root";
$password = "******";
$dbname = "yixzm";

$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
        die("Connect Failed: " . $conn->connect_error);
}

//預處理，個人理解：封裝資料庫操作，簡化多條資料場景下的提交過程
 

$stmt = $conn->prepare("insert into guests (name, email) values(?, ?)");
//i(int), s(string), d(double)
$stmt->bind_param("ss", $name, $email);

// add data to table
$name = "Sanji";
$email = "[email protected]";
$stmt->execute();

$name = "Usopp";
$email = "[email protected]";
$stmt->
 
execute();

echo "Insert Successfully!";

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

?>

與之前插入資料的方式

$sql = "insert into guests (name, email)
        values ('Luffy', '[email protected]')";

相比，現在的方式在預處理後，用賦值的方式（如$name = "Sanji";）定義資料後，統一使用$stmt->execute();提交數年的方式顯然更適合以後大量資料採用各種騷包演算法變著花樣以各種姿勢插入。