Native PHP underlying development actual combat and best practices

With the rapid development of Internet technology, Web development has become an increasingly important skill. However, nowadays, web development technologies are emerging in endlessly, and various frameworks and languages ​​are emerging one after another. However, even in such a technological trend, native PHP underlying development is still the cornerstone of Web development. This article will discuss the actual and best practices of native PHP underlying development, leading readers to gain an in-depth understanding of the mysteries of PHP underlying development.

What is native PHP underlying development?

PHP is a server-side scripting language widely used in web development. Native PHP bottom-level development refers to using the basic syntax and functions of the PHP language to directly write the bottom-level code to realize various functions of Web applications. The underlying code here refers to the code that deals with the operating system, web server, or database. Usually, these low-level codes interact directly with the system or directly with the underlying libraries, rather than relying on upper-level components such as frameworks and external libraries.

Advantages and Disadvantages of Native PHP Bottom-Level Development

Compared with using high-level technologies such as frameworks, native PHP bottom-level development has its own advantages and disadvantages.

Advantages:

1. Higher flexibility: Native PHP underlying developers can freely adjust the code according to needs without being restricted by frameworks or libraries.
2. Slimming optimization: Without using any framework or dependencies, the program is more lightweight, runs faster, and the code is simpler.
3. In-depth understanding of PHP: Native PHP underlying development can help developers have a deeper understanding of the PHP language itself and master more proficiency and principles.

Disadvantages:

1. Long development cycle: In the absence of frameworks and libraries, you need to write a lot of code yourself, and the development cycle is relatively long.
2. Prone to errors: Developers need to implement all functions themselves, which is prone to loopholes or instability.
3. Higher maintenance costs: For the implementation of the underlying code, maintenance costs will also increase and it will be more difficult.

Native PHP underlying development case

Next, this article will take a simple registration and login function as an example to show the actual operation of native PHP underlying development. The basic logic implemented by this function is as follows:

1. The user submits registration information;
2. The server verifies the information submitted by the user;
3. The server saves the user information to the database ;
4. The user submits login information;
5. The server verifies the information submitted by the user;
6. After the server passes the verification, it returns login success information.

The code is implemented as follows:

//1. Connect to the database
$servername = "localhost";
$username = "root ";
$password = "";
$dbname = "test";

$conn = mysqli_connect($servername, $username, $password, $dbname);

//2.Registration
if(isset($_POST['submit'])) {

$username = $_POST['username'];
$password = $_POST['password'];
$email = $_POST['email'];

//2.1 对用户输入的信息进行校验，确保输入的信息不为空且格式正确

//2.2 将用户信息保存到数据库中
$sql = "INSERT INTO users (username, password, email)
VALUES ('$username', '$password', '$email')";

if (mysqli_query($conn, $sql)) {
    echo "注册成功！";
} else {
    echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}

}

//3.Login
if(isset($ _POST['login'])) {

$username = $_POST['username'];
$password = $_POST['password'];

//3.1 校验用户名和密码是否匹配
$sql = "SELECT * FROM users WHERE username = '$username' and password = '$password'";
$result = mysqli_query($conn,$sql);
$count = mysqli_num_rows($result);

//3.2 验证用户名和密码是否正确
if($count==1) {
    echo "登录成功！";
}
else {
    echo "用户名或密码错误！";
}

}
?>

Best Practice

1. Separate underlying code from business logic

During the development process, it is very important to separate the underlying code from the business logic. The underlying code is responsible for handling some basic logic, such as database connection, user authentication, etc. Business logic is responsible for implementing specific functions, such as user registration, login, etc. Doing this can make the code more modular and facilitate later maintenance.

2. Ensuring code security

For native PHP underlying development, code security is very important. Developers need to strictly verify and filter the data entered by users to prevent code from being exploited for attacks. In addition, data needs to be encrypted and decrypted.

3. Code introduction is clear

The development of the underlying code needs to ensure the simplicity of the code and avoid code redundancy. Code should be easy to read and maintain, and complex nesting, overly large functions, etc. should be avoided as much as possible.

Conclusion

Native PHP underlying development may not be the most popular technology, but it is still an integral part of web development. This article discusses the actual implementation of the underlying development of native PHP, hoping to help everyone better understand the underlying development methods of PHP. Through the introduction of this article, readers can understand the advantages and disadvantages, code implementation and best practices of native PHP underlying development.

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