regex101 : Free PCRE-based regular expression debugger with real time explanation, error detection and highlighting.
Kint : Kint for PHP is a tool designed to present your debugging data in the absolutely best way possible.
In other words, it’s var_dump() and debug_backtrac...
HTTP API design : This guide describes a set of HTTP+JSON API design practices, originally extracted from work on the Heroku Platform API.
