PHP .env Sample Implementation

env.autoload.php

<?php
/**
 * Create .env file in same directory in following format
 * DB_HOST=localhost
 * DB_USERNAME=username
 * DB_PASSWORD=password
 *
 *
 * Usage:
 *
 *  include 'path-to-env-autoload.php/env.autoload.php';
 *
 *  $hostValue = env('DB_HOST', 'www.google.com');
 */

if( file_exists($file = dirname(__FILE__) . '/.env') ) {
    foreach(explode(PHP_EOL, file_get_contents($file)) as $line) {
        if( empty($line) ) continue;
        list($key, $value) = explode("=", $line, 2);
        putenv("$key=$value");
    }
}

if( !function_exists('env') ) {
    function env($key, $default = null){
        $value = getenv($key);

        if ($value === false) {
            return $default;
        }

        return $value;
    }
}