1. Go to this page and download the library: Download maxh/php-nominatim 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/ */
maxh / php-nominatim example snippets
use maxh\Nominatim\Nominatim;
$url = "http://nominatim.openstreetmap.org/";
$nominatim = new Nominatim($url);