How to implement complex business logic and functions through PHP native development

How to implement complex business logic and functions through PHP native development

Introduction:
In today's web development field, PHP is a very popular post-processing Terminal development language. PHP native development means not relying on frameworks and using pure PHP code to implement business logic and functionality. This article will introduce how to implement complex business logic and functions through PHP native development, and provide some practical code examples.

1. Design a good architecture
Before we start writing code, we need to understand and design a good architecture. When designing the architecture, we can adopt the MVC (Model-View-Controller) pattern and divide the code into models (Model), views (View) and controllers (Controller). This makes the code more modular, easier to maintain and extend.

The following is a simple MVC example:

1. Create the index.php file as the entry file of the website:

   <?php
   require 'controller.php';

2. Create the controller.php file as the controller:

   <?php
   require 'model.php';
   require 'view.php';
   
   $data = fetchData(); // 从模型获取数据
   
   renderView($data); // 渲染视图显示数据

3. Create the model.php file as the model:

   <?php
   function fetchData()
   {
     // 从数据库或其他数据源获取数据
     // ...
   
     return $data;
   }

4. Create the view.php file , as a view:

   <?php
   function renderView($data)
   {
     // 将数据渲染到视图中
     // ...
   }

2. Processing form submission
In web development, processing user-submitted forms is a common task. Here is an example of handling a login form:

1. Create the login.php file as a form for the login page:

   <form method="POST" action="login.php">
     <input type="text" name="username" placeholder="Username">
     <input type="password" name="password" placeholder="Password">
     <input type="submit" value="Login">
   </form>

2. Create the login.php file To process the login form submitted by the user:

   <?php
   if ($_SERVER['REQUEST_METHOD'] === 'POST') {
     $username = $_POST['username'];
     $password = $_POST['password'];
   
     // 验证用户名和密码
     // ...
   
     // 处理登录逻辑
     // ...
   }

3. Database operation
PHP native development also needs to be able to flexibly operate the database. The following is a simple example using a MySQL database:

1. Connect to the database and establish a database connection:

   <?php
   $servername = "localhost";
   $username = "root";
   $password = "password";
   $dbname = "mydb";
   
   $conn = new mysqli($servername, $username, $password, $dbname);
   if ($conn->connect_error) {
     die("Connection failed: " . $conn->connect_error);
   }

2. Query the data and output the results:

   <?php
   $sql = "SELECT * FROM users";
   $result = $conn->query($sql);
   
   if ($result->num_rows > 0) {
     while($row = $result->fetch_assoc()) {
    echo "ID: " . $row["id"]. " - Name: " . $row["name"]. " - Email: " . $row["email"]. "<br>";
     }
   } else {
     echo "0 results";
   }
   
   $conn->close();

Conclusion:
Through PHP native development, we can easily implement complex business logic and functions. Designing a good architecture, handling form submissions and database operations are common tasks in PHP native development. Through the above examples, we can better master the skills of PHP native development and implement more complex business logic and functions.

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