Renamed index file

Author: uttamukkoji

README.md

@@ -13,16 +13,30 @@ You need PHP version >= 5.5.0 or later installed to use the Contentstack PHP
 
 ### Setup and Installation
 
+#### Install the library using [Composer](https://packagist.org/packages/contentstack/contentstack):
+To use the PHP SDK, you need to perform the following steps:
+
+    composer require contentstack/contentstack
+
+To initialize the SDK, you will need to specify the API Key, Delivery Token, and Environment Name of your stack.
+
+    use Contentstack\Contentstack;
+    $stack = Contentstack::Stack(API_KEY, DELIVERY_TOKEN, ENV_NAME);
+
+
+#### Download and install library:
 To use the PHP SDK, you need to perform the following steps:
 
 1. Download/clone the PHP SDK from [here](https://www.contentstack.com/docs/platforms/php/php_sdk_latest). 
 2. Paste the downloaded ZIP file of the PHP SDK to a folder of your choice. 
 
 To initialize the SDK, you will need to specify the API Key, Delivery Token, and Environment Name of your stack.
 
-    use Contentstack\Contentstack;include_once "contentstack/index.php";
+    use Contentstack\Contentstack;
+    include_once "contentstack/contentstack.php";
     $stack = Contentstack::Stack(API_KEY, DELIVERY_TOKEN, ENV_NAME);
 
+
 ### Key Concepts for using Contentstack
 
 #### Stack

composer.json

@@ -1,5 +1,5 @@
 {
-    "name": "contentstack/contentstack-php",
+    "name": "contentstack/contentstack",
     "description": "Contentstack is a headless CMS with an API-first approach that puts content at the centre. It is designed to simplify the process of publication by separating code from content.",
     "type": "library",
     "license": "MIT",

src/contentstack.php

@@ -0,0 +1,51 @@
+<?php
+/**
+ *  Contentstack abstract class to provide access to Stack Object
+ * 
+ * PHP version 5
+ * 
+ * @category  PHP
+ * @package   Contentstack
+ * @author    Uttam K Ukkoji <uttamukkoji@gmail.com>
+ * @author    Rohit Mishra <rhtmishra4545@gmail.com>
+ * @copyright 2012-2020 Contentstack. All Rights Reserved
+ * @license   https://github.com/contentstack/contentstack-php/blob/master/LICENSE.txt MIT Licence
+ * @link      https://pear.php.net/package/contentstack
+ */
+namespace Contentstack;
+
+use Contentstack\Stack\Stack;
+
+require_once __DIR__ . '/lib/models/stack.php';
+
+/**
+ *  Contentstack abstract class to provide access to Stack Object
+ * 
+ * @category  PHP
+ * @package   Contentstack
+ * @author    Uttam K Ukkoji <uttamukkoji@gmail.com>
+ * @author    Rohit Mishra <rhtmishra4545@gmail.com>
+ * @copyright 2012-2020 Contentstack. All Rights Reserved
+ * @license   https://github.com/contentstack/contentstack-php/blob/master/LICENSE.txt MIT Licence
+ * @link      https://pear.php.net/package/contentstack
+ */
+abstract class Contentstack
+{
+    /**
+     * Static method for the Stack constructor
+     * 
+     * @param string             $api_key      : Contentstack Stack API KEY.
+     * @param string             $access_token : Contentstack Stack ACCESS TOKEN.
+     * @param string             $environment  : Environment Name.
+     * @param ContentstackRegion $region       : Region name of Contentstack.
+     * 
+     * @return Stack
+     * */
+    public static function Stack($api_key = '',
+        $access_token = '',
+        $environment = '',
+        $region = ''
+    ) {
+        return new Stack($api_key, $access_token, $environment, $region);
+    }
+}