You can also look up for these other topics:
Framework
Coding Standards
Boilerplate
CMS
Tool
Security
Hacktoberfest
PHP Curl Class makes it easy to send HTTP requests and integrate with web APIs
php-curl-classTool to browse data exposed by Ubiquiti's UniFi Controller API
Art-of-WiFiA PHP API client class to interact with Ubiquiti's UniFi Controller API
Art-of-WiFiCLI tool to crawl a website and check HTTP status codes
spatie