7. Web Server, PHP, SSL

📄️Introduction

Understand how the web server, PHP runtime, and TLS work together to power a fast, secure WordPress VPS.

Operate OpenLiteSpeed (OLS) from the CLI with a focus on virtual hosts, listeners, PHP integration, and WordPress-friendly defaults.

Find, tail, and interpret OpenLiteSpeed access/error logs for WordPress troubleshooting.

Check installed PHP extensions and install the WordPress-required modules on Debian/Ubuntu and RHEL family systems.

Locate and safely edit php.ini settings (memory, upload size, timeouts) for WordPress on Apache, Nginx/PHP-FPM, or OpenLiteSpeed.

Issue and renew free TLS certificates with Certbot for Nginx, Apache, or OpenLiteSpeed on a VPS.

Enable and verify HTTP/2 and HTTP/3 (QUIC) for WordPress sites on Nginx, Apache, or OpenLiteSpeed.

Practical runbooks for common WordPress VPS tasks involving the web server, PHP runtime, and TLS.