PHP script to export web push subscription stats from SendPulse

Steps to use:

1. Download the archive.
2. Exctract it.
3. Enable API access in your SendPulse settings.
4. Make the needed amendments to the script:
1. set your API_USER_ID and API_SECRET.
2. add the list of your domains into $country_mapping variable
5. Run the script with php index.php > senpulse.csv (PHP 7+ needed):
6. Wait for the script to finish (average speed is ~60k subscribers per hour).

Important! The exported data  isn't enough for transfering yoour subscribers to other web push service provider. It's good only for stat analysis.