You can also look up for these other topics:
Framework
Coding Standards
Boilerplate
CMS
Tool
Security
Hacktoberfest
Beautiful and understandable static analysis tool for PHP
Prometheus instrumentation library for PHP applications
Grafana module for Icinga Web 2 (supports InfluxDB & Graphite)
Docker Compose Setup for Telegraf / InfluxDB / Grafana (TIG)
Symfony 5/6 Prometheus Metrics Bundle