Laravel Package Development

Introduction

Light diffraction prism. In addition to the commands provided with Artisan, you may also build your own custom commands for working with your application. You may store your custom commands in the app/Console/Commands directory; however, you are free to choose your own storage location as long as your commands can be autoloaded based on your composer.json settings.

Service providers are very important when it comes to package development with Laravel. They usually serve as the entry point between your package and the Laravel application making use of your package. They are also responsible for binding classes into the service container and informing Laravel how to load package resources such as config.

In this 15 minute video, I'll show you how I developed a simple Laravel wrapper package that makes calls to an external API. Directly support these videos: h. Laravel is a web application framework with expressive, elegant syntax. We believe development must be an enjoyable and creative experience to be truly fulfilling. Laravel attempts to take the pain out of development by easing common tasks used in most web projects.

Building A Command

Generating The Class

To create a new command, you may use the make:console Artisan command, which will generate a command stub to help you get started:

Generate A New Command Class

The command above would generate a class at app/Console/Commands/FooCommand.php.

When creating the command, the --command option may be used to assign the terminal command name:

Writing The Command

Once your command is generated, you should fill out the name and description properties of the class, which will be used when displaying your command on the list screen.

The fire method will be called when your command is executed. You may place any command logic in this method.

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Arguments & Options

The getArguments and getOptions methods are where you may define any arguments or options your command receives. Both of these methods return an array of commands, which are described by a list of array options.

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When defining arguments, the array definition values represent the following:

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The argument mode may be any of the following: InputArgument::REQUIRED or InputArgument::OPTIONAL.

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When defining options, the array definition values represent the following:

For options, the argument mode may be: InputOption::VALUE_REQUIRED, InputOption::VALUE_OPTIONAL, InputOption::VALUE_IS_ARRAY, InputOption::VALUE_NONE.

The VALUE_IS_ARRAY mode indicates that the switch may be used multiple times when calling the command:

Would then allow for this command:

The VALUE_NONE option indicates that the option is simply used as a 'switch':

Retrieving Input

While your command is executing, you will obviously need to access the values for the arguments and options accepted by your application. To do so, you may use the argument and option methods:

Retrieving The Value Of A Command Argument

Retrieving All Arguments

Retrieving The Value Of A Command Option

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Retrieving All Options

Writing Output

To send output to the console, you may use the info, comment, question and error methods. Each of these methods will use the appropriate ANSI colors for their purpose.

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Sending Information To The Console

Sending An Error Message To The Console

Asking Questions

You may also use the ask and confirm methods to prompt the user for input:

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Asking The User For Input

Asking The User For Secret Input

Asking The User For Confirmation

You may also specify a default value to the confirm method, which should be true or false:

Calling Other Commands

Sometimes you may wish to call other commands from your command. You may do so using the call method:

Registering Commands

Registering An Artisan Command

Once your command is finished, you need to register it with Artisan so it will be available for use. This is typically done in the app/Console/Kernel.php file. Within this file, you will find a list of commands in the commands property. To register your command, simply add it to this list.

When Artisan boots, all the commands listed in this property will be resolved by the service container and registered with Artisan.