You can also look up for these other topics:
Framework
Coding Standards
Boilerplate
CMS
Tool
Security
Hacktoberfest
Slug Generator Library for PHP, based on Unicode’s CLDR data
ausi🉑 Portable UTF-8 library - performance optimized (unicode) string functions for PHP.
voku🔡 Portable ASCII library - performance optimized (ascii) string functions for PHP.
voku