1. Go to this page and download the library: Download skagarwal/google-places-api library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
use SKAgarwal\GoogleApi\PlacesApi;
function () {
$googlePlaces = new PlacesApi('API_KEY') # line 1
$response = $googlePlaces->placeAutocomplete('some input'); # line 2
}