Add algolia search php client playground

Author: TomKlotzPro

php/LICENSE.md

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+The MIT License (MIT)
+
+Copyright (c) Nuno Maduro <[email protected]>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

php/README.md

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+## Installation
+
+> **Requires [PHP 7.2+](https://php.net/releases/)**
+
+```bash
+git clone https://github.com/algolia/algoliasearch-client-php-playground
+```
+
+```bash
+cd algoliasearch-client-php-playground && composer update
+```
+
+## Usage
+
+1. Edit the file `bin/index.php`.
+2. Run the php file using: `php bin/index.php`.

php/bin/index.php

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+<?php
+
+require __DIR__.'/../vendor/autoload.php';
+
+(new \NunoMaduro\Collision\Provider())->register();
+
+// Here goes your code:
+$client = \Algolia\AlgoliaSearch\SearchClient::create('..', '..');
+$index = $client->initIndex('contacts');

php/composer.json

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+{
+    "name": "algolia/algoliasearch-client-php-playground",
+    "keywords": ["algolia", "php", "playground"],
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Nuno Maduro",
+            "email": "[email protected]"
+        }
+    ],
+    "require": {
+        "php": "^7.2",
+        "algolia/algoliasearch-client-php": "^2.2",
+        "nunomaduro/collision": "^2.1",
+        "symfony/var-dumper": "^4.1"
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true,
+    "config": {
+        "sort-packages": true,
+        "preferred-install": "dist"
+    }
+}