regex101 : Free PCRE-based regular expression debugger with real time explanation, error detection and highlighting.
JSON Schema : JSON Schema is a vocabulary that allows you to annotate and validate JSON documents.
enable cross-origin resource sharing : Cross-Origin Resource Sharing (CORS) is a specification that enables truly open access across domain-boundaries. If you serve public content, please c...
DesignPatternsPHP : This is a collection of known design patterns and some sample code how to implement them in PHP. Every pattern has a small list of examples (most of t...
