How does php use the ThinkPHP5 framework?

With the continuous upgrading of Internet applications, the development of websites and applications is becoming more and more important. As an efficient, open source, easy-to-learn and easy-to-use programming language, PHP is favored by developers. Among the PHP frameworks, ThinkPHP5 is also a very popular framework. Let’s talk about how to use ThinkPHP5 to build PHP applications.

What is ThinkPHP5 framework?

ThinkPHP is a lightweight PHP development framework based on the MVC (Model-View-Controller) design pattern. It is dedicated to rapid Web application development and focuses more on collaboration and specification in the development process of Web applications. It provides Powerful development tools and optimized performance, as well as good scalability and maintainability features.

ThinkPHP5 framework is an upgraded version of ThinkPHP. It integrates Composer and PSR-4 automatic loading standards. PHP 7.0 and above are recommended. It adopts new ideas in design and enhances the flexibility of the framework. Scalability and performance are very friendly to both novices and veterans.

Installing the ThinkPHP5 framework

The installation of the ThinkPHP5 framework is very simple. Let’s introduce two installation methods.

1. Install using Composer:

Composer is a dependency manager for PHP. It also uses Packagist to provide ready-made packages to download and manage packages conveniently and quickly. So, we can use Composer to install the ThinkPHP5 framework.

First, we need to install Composer. The download address is: https://getcomposer.org/download/. After installation, we type the following code on the CMD command line:

composer create-project topthink/think tp5

At this time, Composer will automatically create a tp5 folder and install the ThinkPHP5 framework into the folder.

2. Manual download and installation:

You can also download the latest ThinkPHP5 framework at https://github.com/top-think/think and install it on your web server Environment, unzip it and copy all the files to your project directory.

Configuring the application

After the installation is completed, in the application directory, we need to configure the ThinkPHP5 framework. It mainly includes the following four aspects:

Application configuration

We need to create a config directory in the application directory, which contains our app.php and database.php configuration files.

The app.php configuration file is mainly used to set the configuration of application access, cache, logs, routing, etc. The specific settings can be customized according to the actual situation.

database.php is the database configuration file, including host address and other related information.

Routing configuration

Routing is the foundation of Web applications, and in the ThinkPHP5 framework, we use route mapping. In the route.php file in the application directory, we can configure routing rules.

For example:

Route::get('hello/:name', 'index/hello');

means that when we access /hello/ followed by any name, the hello() method of the Index controller will be automatically called, and Hello will be output, plus the name. .

Template configuration

In the ThinkPHP5 framework, we use a template engine based on the tag library to achieve the separation of data and performance. In the config.php file in the tp directory, we can make relevant configurations.

For example:

'taglib_build_in' => 'cx,alexa'

means loading the two tag libraries built into the system, cx and alexa.

Cache configuration

In cache.php in the application directory, we can turn on and off the cache, set the cache type and cache time, etc.

For example:

'expire' => 0, // 默认缓存时间，0为永久缓存

means setting the cache time to permanent cache.

Create application

The application is created in the application directory and mainly includes three aspects:

Controller

The controller is used to receive requests and process Request, return data and the core part of the page. In the ThinkPHP5 framework, controllers are usually stored in the application's controller directory.

For example, we can create an Index controller:

namespace appindexcontroller;

class Index
{
    public function hello($name = 'ThinkPHP5')
    {
        return 'hello,' . $name;
    }
}

This means that we have created an Index controller and defined a hello() method in it. If the request is followed by /hello/ Any name above will output "Hello, XXX!"

Model

In the model directory under the application directory, we can define the data model. A data model is a PHP class corresponding to a database table.

For example:

namespace appindexmodel;

use thinkModel;

class User extends Model
{
    //
}

In this example, we create a data model named User. In the model, we can define various methods to operate the database and encapsulate these methods. up for calls from controllers and other pieces of code.

View

View is the HTML page that the front-end user finally sees. They are stored in the application's view directory.

For example, we can create an index.html file and write the following HTML code

<html>
<head>
    <title>{$title}</title>
</head>
<body>
    Hello, {$name}!
</body>
</html>

Among them, the variables $title and $name can be dynamically bound in the controller.

Run the application

At this point, we have completed the installation of the ThinkPHP5 framework and the construction of the application. Let's take a look at the last step: running the application.

You can enter

php think run

on the terminal to access http://localhost/hello/world in a Web server environment, and the "Hello, world!" we defined before will be output.

Summary

Through the above brief introduction, we believe that you have mastered how to use the ThinkPHP5 framework for PHP application development. The ThinkPHP5 framework provides powerful development tools that can help you build Web applications quickly and efficiently. Whether you are a beginner or an experienced developer, you can quickly implement your ideas in the ThinkPHP5 framework.

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