laravel system installation tutorial-Laravel-php.cn

Laravel is an excellent PHP framework, which is widely used in web application development, API development and other fields. The installation of Laravel is very simple. Let's introduce the installation tutorial of Laravel system.

1. Environmental requirements

Before starting the installation of Laravel, we need to ensure that our computer meets the following environmental requirements:

PHP 7.4 or higher
Extensions: BCMath, Ctype, Fileinfo, JSON, Mbstring, OpenSSL, PDO, Tokenizer, XML
Composer (PHP package manager)
Node.js and NPM (available Select, used for front-end resource compilation and management)

2. Laravel installation process

Installing Composer

Laravel is based on Composer. So we need to install Composer before starting. Just download the installation package for the corresponding operating system from the official website.

Create a Laravel project

Next we need to create a Laravel project through Composer. Open the command terminal and enter the directory where you will create the Laravel project, and execute the following command:

composer create-project --prefer-dist laravel/laravel 项目名称

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Theproject namehere can be customized. This command will download the latest stable version from the Laravel official warehouse Laravel and install it into theproject namefolder.

Configure environment variables

After the download is completed, open the.envfile and configure it accordingly according to your database configuration information. The default database driver in the configuration file ismysql. If you want to use other database types, you need to make the corresponding configuration in theconfig/database.phpfile.

Generate application key

In Laravel’s.envfile, there is a configuration item namedAPP_KEY, which is used to encrypt the data required by the application. If you plan to use an encryption scheme with Laravel, you will need to generate an application key within your application. Open the command terminal and enter the following command in the project root directory:

php artisan key:generate

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If the execution is successful, you can see a newAPP_KEY# in your.envfile ## Configuration items.

Now that you have completed all the steps of Laravel installation, you are ready to run the application! Enter the following command in the command terminal:

php artisan serve

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Then you can visit http://localhost:8000 in the browser to view your Laravel application.

3. Solutions to common problems

You may encounter some common problems during the installation of Laravel. Let’s take a look at how to solve these problems.

If you encounter the following error when executing the

composer create-projectcommand:

[ErrorException] file_put_contents(C:UsersUserNameAppDataRoamingComposerendorlaravel ramework.gitattributes): failed to open stream: Permission denied

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This is caused by Composer not having permission to access the file. You can start the command line interface with administrator privileges, or use the following command:

composer create-project --prefer-dist --no-scripts --no-progress laravel/laravel 项目名称

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The

--no-scriptsparameter in this command means to skip executing the Composer script when creating the project. And--no-progressis used to turn off the progress bar.

This problem usually occurs after executing the

composer updatecommand. This is caused by Laravel not loading the class. You can reload Composer autoload files using the following command:

composer dump-autoload

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404 Not Foundoccurs when you access the application The error may be caused by you not setting the correct database information in the.envfile. Please make sure you have set the correct database information in the configuration file.

If you get the following error message when accessing the application:

No supported encrypter found. The cipher and / or key length are invalid.

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This is due to your

. This is caused by theAPP_KEYvalue in the envfile being empty or invalid. You need to use the commandphp artisan key:generateto generate a key for encryption. If you have already generated a key, please check whether the value of this configuration item in your.envfile is correct.

Summary

Laravel is a very excellent PHP framework. Its installation process is very simple and can be completed in just a few steps. During the installation process, if you encounter problems, you can refer to the solutions provided in this article to solve them. I hope this article can be helpful to friends who are new to Laravel.

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