refactor: update readme

Author: TomKlotzPro

php/README.md

@@ -1,16 +1,22 @@
-## Installation
+# About Algolia's API Client PHP
 
-> **Requires [PHP 7.2+](https://php.net/releases/)**
+Algolia's API Client php was created by, and is maintained by [Algolia](https://github.com/algolia). The Algolia Search API Client for php lets you easily use the Algolia Search REST API from your php code.
 
-```bash
-git clone https://github.com/algolia/api-clients-playground
-```
+## Get started locally
+
+> **Requires:**
+- **[PHP 7.2+](https://php.net/releases/)**
+- **[Composer](https://getcomposer.org/)**
 
+First, use *composer* to playground dependencies:
 ```bash
-cd api-clients-playground/php && composer install
+# Go inside the playground ruby folder
+cd api-clients-playground/php
+# Install dependencies
+composer install
 ```
 
-## Usage
-
-1. Edit the file `bin/index.php`.
-2. Run the php file using: `php bin/index.php`.
+Finally, edit and run the code on `bin/index.php`:
+```
+php bin/index.php
+```