# SIMPLIFIED ENVORONMENT VARIABLE SETTINGS

• SIMPLIFIED ENVORONMENT VARIABLE SETTINGS
  • 1. .htacesss
    • 1.1 Example
  • 2. Retreiving Environment Variables from .htaceess
  • 3. Input Class

a .htacesss file can be craated anywhere in the file structure.

• The rules specified in each file be valid for the current directory and below.

.. Root Folder
.htaccess (Rules applies for all files and folders, that includes all files and folders inside Model and model/phpmmailer)
  /root/model
     ..htaccess (Rules for this file applies for the Model directory and phpmailer etc. But it doen not delete any the parent .htaccess rules, only the same rukles that is defined again will override tha parent's rules.)
  /root/model/phpmailer

So this means we can specify the default values for the DB connection and E-Mail settings in the document root's .htaccess file and override those settings with values set in the .htaccess file in the model folder. The .htaccess file in the document root can be added to the the SVN repo but the .htaccess file in the model folder will be excluded from the repo

PHP let you do this in a variaty of ways

• Using the getenv('setting_key') function
• Using the super global $_ENV['setting_key'] variable
• Using the filter_input(INPUT_TYPE,'setting_key',FLAG) function

The filter_input() is the preferred wat because first you can specify the origin if the variable. INPUT_ENV, INPUT_SERVER, INPUT_GET, INPUT_POST. This stops someone from adding a setting with $_ENV['setting'] = 'value' and the using it as a ENV variable. The filter_input() retreive null for all key => value pairs being retreived of the wrong INPUT_TYPE. The second argument is the key of the setting you want to retreive. The 3rd argument you can choose between a lot of PHP FLAGS that will validate and sanitize the inputs.

The Input class contains methods for gettting an integer, string, bool and email by calling the following static methods that don't actuallt exits:

Env::int('key'); Env::str('key'); Env::bool('key'); Env::email('key');
Post::int('key'); Post::str('key'); Post::bool('key'); Post::email('key');
Get::int('key'); Get::str('key'); Get::bool('key'); Get::email('key');
Server::int('key'); Server::str('key'); Server::bool('key'); Server::email('key');

By calling these method the __callStatic Method will be called, which will intern instantiate the Env,Post,Get,Server class that extend the Input class and and run the corrosponding _int ,_str, _bool, _email method andreturn the value of the key given