Creating advanced Autoloaders with namespaces and directories_Laravel Application Development Cookbook-QQ阅读男生科幻网

书名：Laravel Application Development Cookbook
作者名：Terry Matula
本章字数：236字
更新时间：2021-07-23 15:33:32

Creating advanced Autoloaders with namespaces and directories

If we want to be sure that our custom classes don't conflict with any other class in our app, we will need to add them to a namespace. Using the PSR-0 standard and Composer, we can easily autoload these classes into Laravel.

Getting ready

For this recipe, we need to set up a standard Laravel installation.

How to do it...

To complete this recipe, follow these steps:

Inside the /app directory, create a new directory named custom, and inside of custom, create a directory named Custom, and in Custom, create a directory named Shapes.

Inside the /app/custom/Custom/Shapes directory, create a file named MyShapes.php and add this code:

<?php namespace Custom\Shapes;

class MyShapes {
    public function triangle() 
    {
        return 'I am a triangle';
    }
}

In the root of the application, open the composer.json file and locate the autoload section. Update it so it looks like this:

"autoload": {
    "classmap": [
    "app/commands",
        "app/controllers",
        "app/models",
        "app/database/migrations",
        "app/database/seeds",
        "app/tests/TestCase.php",
    ],
    "psr-0": {
        "Custom": "app/custom"
    }
}

Open the command line and run dump-autoload on Composer:
```
php composer.phar dump-autoload
```

Now we can call that class by using its namespace. For example, if we create a route:

Route::get('shape', function()
{
    $shape = new Custom\Shapes\MyShapes;
    return $shape->triangle();
});

How it works...

Namespaces are a powerful addition to PHP, and they allow our classes to be used without us having to worry about their class names interfering with other class names. By autoloading namespaces in Laravel, we could create a complex group of classes and never have to worry about class names conflicting with other namespaces.

For our purposes, we're loading the custom class through composer, and the PSR-0 standard of autoloading.

There's more...

To further extend the use of our namespaced class, we could use the IoC to bind it to our app. More information can be found in the Laravel documentation at http://laravel.com/docs/ioc.