This article describes how to solve PDOException: SQLSTATE[HY000]  Connection refused when connecting from any PHP application with PDO::MySQL to a SSL enabled MySQL database with mismatching CN.
In every software application there is a need to uniquely identify objects. Depending on their real-life representation there are properties, which naturally serve as a unique key. For example a car object can use its plate number, a person object can use their fingerprint image, a flight can use its code etc. But other objects
A solution of how to provide on-demand thumbnails of any size, based on user uploaded images, stored on Google Cloud Storage with Nginx and a Java restful web service. Cache generated thumbnails and make them disposable keeping only originals. Save storage space by deleting old or all thumbnails.