php CodeIgniter project case: complete analysis from idea to implementation

Background of the project

php Editor Xinyi will take you to explore the CodeIgniter project case in depth: a complete analysis from idea to implementation. This article will introduce in detail how to use the CodeIgniter framework to develop a project, from the initial idea to the final implementation, revealing the whole picture of project development for you, allowing you to easily master the key steps and techniques of project development.

Book display: Displays all books sold on the website, including book title, author, price, inventory quantity and other information.
Book Search: Allows users to search for books by title, author or ISBN number.
Shopping Cart: Allows users to add purchased books to the shopping cart and calculate the total price.
Order management: Allow users to view their orders, modify or cancel orders.
Payment: Provides a variety of payment methods, including online payment and cash on delivery.
Delivery: Provides a variety of delivery methods, including express delivery and postal service.

Technical Selection

When choosing

to develop the framework, we considered the following points:

The popularity and activity of the framework.
Whether the
• learning curve of the framework is steep.
Whether the framework provides good documentation and community support.
Whether the framework can meet the project's performance and
• security requirements.

After comprehensive consideration, we chose the

PHP CodeIgniter framework as the development framework of the project. CodeIgniter is a lightweight, high-performance php framework that has the following advantages:

Learning curve is gentle.
Documentation and community support are good.
Be able to meet the performance and security requirements of the project.

Project

Architecture

We adopt the

mvc (Model-View-Controller) architecture to design the code structure of the project. MVC is a commonly used software architecture pattern that separates the business logic, presentation layer and control logic of an application, making the code clearer and easier to understand, and easier to maintain and expand.

In our project, the model layer is responsible for interacting with the

database, obtaining or storing data from the database; the view layer is responsible for generating the content of the web page; the controller layer is responsible for processing User requests, calls the model layer to obtain or store data, and passes the data to the view layer to generate web pages.

Code

In the implementation process of the project code, we mainly used the following technologies:

CodeIgniter framework: as the development framework of the project.
• MysqlDatabase: as the database of the project.
• html, CSS and javascript: as front-end development technologies for web pages.

In terms of code organization, we follow the principles of MVC architecture and divide the code into model layer, view layer and controller layer, and place them in different folders.

In the model layer, we create model classes that interact with the database. These model classes are responsible for obtaining or storing data from the database. For example, we created a Book model class that is responsible for obtaining or storing book information from the database.

class Book extends CI_Model {

public function get_all_books() {
$query = $this->db->get("books");
return $query->result_array();
}

public function get_book_by_id($id) {
$query = $this->db->get_where("books", array("id" => $id));
return $query->row_array();
}

public function add_book($data) {
$this->db->insert("books", $data);
return $this->db->insert_id();
}

public function update_book($id, $data) {
$this->db->where("id", $id);
$this->db->update("books", $data);
return $this->db->affected_rows();
}

public function delete_book($id) {
$this->db->where("id", $id);
$this->db->delete("books");
return $this->db->affected_rows();
}

}

In the view layer, we created the view file used to generate web page content. These view files are responsible for outputting data to the web page in the form of HTML. For example, we created a book_list.php view file responsible for displaying a list of all books on the website.

<!DOCTYPE html>
<html>
<head>
<title>图书列表</title>
</head>
<body>
<h1>图书列表</h1>
<ul>
<?php foreach ($books as $book) { ?>
<li>
<?php echo $book["name"]; ?>
- <?php echo $book["author"]; ?>
- <?php echo $book["price"]; ?> 元
- <?php echo $book["stock"]; ?> 件
</li>
<?php } ?>
</ul>
</body>
</html>

In the controller layer, we created the controller class for handling user requests. These controller classes are responsible for calling the model layer to obtain or store data, and passing the data to the view layer to generate web pages. For example, we created a BookController controller class that is responsible for handling user requests related to books.

class BookController extends CI_Controller {

public function index() {
$books = $this->Book->get_all_books();
$this->load->view("book_list", array("books" => $books));
}

public function add() {
$this->load->view("book_add");
}

public function save() {
$data = array(
"name" => $this->input->post("name"),
"author" => $this->input->post("author"),
"price" => $this->input->post("price"),
"stock" => $this->input->post("stock")
);
$this->Book->add_book($data);
redirect("book");
}

public function edit($id) {
$book = $this->Book->get_book_by_id($id);
$this->load->view("book_edit", array("book" => $book));
}

public function update($id) {
$data = array(
"name" => $this->input->post("name"),
"author" => $this->input->post("author"),
"price" => $this->input->post("price"),
"stock" => $this->input->post("stock")
);
$this->Book->update_book($id, $data);
redirect("book");
}

public function delete($id) {
$this->Book->delete_book($id);
redirect("book");
}

}

project outcome

By using the CodeIgniter framework, we successfully developed an online book sales website with complete functions, including book display, book search, shopping cart, order management, payment and delivery, etc.

After the website was launched, it was recognized by customers and received good market response. Website visits and sales are growing steadily, and our customers are very satisfied with our service.

Summarize

Through this project case, we introduced in detail how to use the PHP CodeIgniter framework to build a website, from idea to implementation, covering the project background, technology selection, project architecture, code implementation and project results. I hope this case can help readers better understand the usage and development process of the CodeIgniter framework.

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