mysqli如何写存储过程

<?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);
}

// 创建存储过程
$sql = "
CREATE PROCEDURE InsertUser(
    IN p_name VARCHAR(255),
    IN p_email VARCHAR(255)
)
BEGIN
    INSERT INTO users (name, email) VALUES (p_name, p_email);
END
";

if ($conn->query($sql) === TRUE) {
    echo "存储过程创建成功";
} else {
    echo "存储过程创建失败: " . $conn->error;
}

// 调用存储过程
$name = "John Doe";
$email = "john.doe@example.com";
$stmt = $conn->prepare("CALL InsertUser(?, ?)");
$stmt->bind_param("ss", $name, $email);
if ($stmt->execute()) {
    echo "记录插入成功";
} else {
    echo "记录插入失败: " . $stmt->error;
}

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