PHP security guides
Clear, practical guides on finding your PHP version, understanding advisories, and upgrading safely.
- 01Basics
How to Check Your PHP Version
Find the exact PHP version on a server, shared host or WordPress site using the command line, phpinfo(), Site Health, cPanel or Plesk, and read the result.
- 02Lifecycle
PHP Security Support Lifecycle Explained
How PHP's active support, security-only and end-of-life phases work, which branches are supported in October 2026, and what each phase means for your servers.
- 03WordPress
How to Update PHP in WordPress
A step-by-step process for safely moving a WordPress site to a newer PHP version: compatibility checks, backups, staging, cPanel or Plesk, rollback.
- 04Patching
How to Check Whether a PHP Security Patch Is Installed
Verify a PHP security fix is really on your server, for upstream builds and Debian, Ubuntu or RHEL packages with backported patches, using changelogs.
- 05Vulnerabilities
Understanding PHP CVEs and Affected Version Ranges
How to read a PHP CVE entry: CVE IDs, CVSS scores, affected version range notation, per-branch fixed versions, and conditions that decide exposure.
- 06Incident response
What to Do After a PHP Security Advisory Is Published
A response playbook for new PHP security releases: triage the advisory, inventory affected servers, patch or mitigate, verify the fix, record it.
- 07Upgrades
PHP Version Compatibility and Safe Upgrade Planning
Plan a PHP branch upgrade with less risk: pick a target, audit code and dependencies with Composer, PHPCompatibility and Rector, test, then roll out.