caching-fixer.io

Caching fixer.io free account with PHP and cron job.

Background:

Free account is limited to 1000 requests per month, hourly data and only EUR as base currency. In my case, I'm fine with hourly and base currency limitation, but probably not ok with the monthly requests limit. To avoid exceeding that, rather than my front-end app requesting directly to fixer.io, it's better for me to set an hourly cron job to do the request to fixer.io and store it on my own server.

1 request * 24 hours * 31 days = 744 requests/month. Well below the monthly limit.

Usage:

1. Create fixer.io account
2. Put API key to file named apikey on private directory.
3. Set cron job to run private/create_cache.php every hour.
4. GET cache.json to read the cache.

Notes:

1. Make sure to prevent public access to private folder (to protect the apikey and prevent public from making request to fixer.io by calling create_cache.php). You can use something like .htaccess:

   Deny from all

2. private/apikey is already on .gitignore to prevent leaking that via repo.