guide: consistent usage of composer command

docs/guide/start-installation.md

@@ -31,7 +31,7 @@ With Composer installed, you can install Yii by running the following commands u
 
 The first command installs the [composer asset plugin](https://github.com/francoispluchino/composer-asset-plugin/)
 which allows managing bower and npm package dependencies through Composer. You only need to run this command
-once for all. The second command installs Yii in a directory named `basic`.
+once for all. The second command installs Yii in a directory named `basic`. You can choose a different directory name if you want.
 
 > Note: During the installation it may happen that Composer asks for login credentials for your Github account because it hits the
 > Github API rate-limit. This is normal because Composer needs to retrieve a lot of information for all the packages from Github.

docs/guide/structure-extensions.md

@@ -17,7 +17,7 @@ To use an extension, you need to install it first. Most extensions are distribut
 packages which can be installed by taking the following two simple steps:
 
 1. modify the `composer.json` file of your application and specify which extensions (Composer packages) you want to install.
-2. run `php composer.phar install` to install the specified extensions.
+2. run `composer install` to install the specified extensions.
 
 Note that you may need to install [Composer](https://getcomposer.org/) if you do not have it.
 
@@ -172,7 +172,7 @@ We recommend you prefix `yii2-` to the project name for packages representing Yi
 It is important that you specify the package type of your extension as `yii2-extension` so that the package can
 be recognized as a Yii extension when being installed.
 
-When a user runs `php composer.phar install` to install an extension, the file `vendor/yiisoft/extensions.php`
+When a user runs `composer install` to install an extension, the file `vendor/yiisoft/extensions.php`
 will be automatically updated to include the information about the new extension. From this file, Yii applications
 can know which extensions are installed (the information can be accessed via [[yii\base\Application::extensions]].
 

docs/guide/tool-gii.md

@@ -19,7 +19,7 @@ Gii is an official Yii extension. The preferred way to install this extension is
 You can either run this command:
 
 ```
-php composer.phar require --prefer-dist yiisoft/yii2-gii "*"
+composer require "yiisoft/yii2-gii:*"
 ```
 
 Or you can add this code to the require section of your `composer.json` file:

docs/guide/tutorial-advanced-app.md

@@ -12,19 +12,18 @@ Installation
 
 ### Install via Composer
 
-If you do not have [Composer](http://getcomposer.org/), you may download it from
-[http://getcomposer.org/](http://getcomposer.org/) or run the following command on Linux/Unix/MacOS:
+If you do not have [Composer](http://getcomposer.org/), follow the instructions in the
+[Installing Yii](start-installation.md#installing-via-composer) section to install it.
 
-~~~
-curl -sS http://getcomposer.org/installer | php
-~~~
+With Composer installed, you can then install the application using the following commands:
 
-You can then install the application using the following command:
+    composer global require "fxp/composer-asset-plugin:1.0.0-beta2"
+    composer create-project --prefer-dist --stability=dev yiisoft/yii2-app-advanced yii-application
 
-~~~
-php composer.phar global require "fxp/composer-asset-plugin:1.0.0-beta2"
-php composer.phar create-project --prefer-dist --stability=dev yiisoft/yii2-app-advanced /path/to/yii-application
-~~~
+The first command installs the [composer asset plugin](https://github.com/francoispluchino/composer-asset-plugin/)
+which allows managing bower and npm package dependencies through Composer. You only need to run this command
+once for all. The second command installs the advanced application in a directory named `yii-application`.
+You can choose a different directory name if you want.
 
 Getting started
 ---------------
@@ -204,7 +203,7 @@ your project.
 Now the interesting part. You can add more packages your application needs to the `require` section.
 All these packages are coming from [packagist.org](https://packagist.org/) so feel free to browse the website for useful code.
 
-After your `composer.json` is changed you can run `php composer.phar update --prefer-dist`, wait till packages are downloaded and
+After your `composer.json` is changed you can run `composer update --prefer-dist`, wait till packages are downloaded and
 installed and then just use them. Autoloading of classes will be handled automatically.
 
 Creating links from backend to frontend

docs/guide/tutorial-start-from-scratch.md

@@ -48,6 +48,6 @@ Use the Template
 That's all that's required to create a new Yii application template. Now you can create projects using your template:
 
 ```
-php composer.phar global require "fxp/composer-asset-plugin:1.0.0-beta2"
-php composer.phar create-project --prefer-dist --stability=dev mysoft/yii2-app-coolone new-project
+composer global require "fxp/composer-asset-plugin:1.0.0-beta2"
+composer create-project --prefer-dist --stability=dev mysoft/yii2-app-coolone new-project
 ```

docs/guide/tutorial-yii-integration.md

@@ -17,7 +17,7 @@ Many third-party libraries are released in terms of [Composer](https://getcompos
 You can install such libraries by taking the following two simple steps:
 
 1. modify the `composer.json` file of your application and specify which Composer packages you want to install.
-2. run `php composer.phar install` to install the specified packages.
+2. run `composer install` to install the specified packages.
 
 The classes in the installed Composer packages can be autoloaded using the Composer autoloader. Make sure
 the [entry script](structure-entry-scripts.md) of your application contains the following lines to install
@@ -83,8 +83,8 @@ If the third-party system uses Composer to manage its dependencies, you can simp
 to install Yii:
 
 ```
-php composer.phar require yiisoft/yii2-framework:*
-php composer.phar install
+composer require "yiisoft/yii2:*"
+composer install
 ```
 
 Otherwise, you can [download](http://www.yiiframework.com/download/) the Yii release file and unpack it in