Getting started with Laravel 4 on CentOS ... First Helloworld app with Laravel-4

Install PHP 5.4>:
At least PHP 5.4 is required to install laravel 4.
Uninstall old php versions php 5.3 <=

1. yum remove php*

Install php 5.4:

1. rpm -Uvh http://mirror.webtatic.com/yum/el6/latest.rpm
2. yum install php54w

Install php mcrypt extension:

1. yum install php54w-mcrypt

Install PHP Data Objects (PDO) extension :

1. yum install php54w-pdo

Install composer (Composer is a dependency manager for PHP.Something like Maven in Java.):

1. cd /usr/local/bin/
2. curl -sS https://getcomposer.org/installer | php
3. mv composer.phar composer
4. composer self-update

Run the following command to create your first laravel helloworld project:

1. composer create-project laravel/laravel hello-laravel-4 --prefer-dist

This command will download and install a fresh copy of Laravel in a new hello-laravel-4 folder within your current directory.
Next run the composer install command in the root of your manually created project directory. 

1. cd hello-laravel-4
2. composer install

This command will download and install the framework's dependencies.
 Now give execute access to PROJECT_ROOT/app/ dir:

1. chmod -R 777 app/

Make sure your current directory contains a file named artisan.
Now run the following command to run your first helloworld app:

1. php artisan serve

Now browse to http://localhost:8000/ to see the output.You should see a screen saying 
"You have arrived." :)