WordPress

Articles

• Error establishing a database connection

  Troubleshooting guide

  Fix WordPress "Error establishing a database connection". Check the database server, wp-config credentials, host string, and connection limits in order.

• WordPress and PHP "headers already sent" white-screen fix

  Troubleshooting guide

  Fix the PHP headers already sent warning in WordPress that causes blank pages, by locating the output that precedes the header call.

• WordPress application passwords for the REST API

  Tutorial

  Create WordPress application passwords for the REST API and external tools, keep them scoped, and revoke them when no longer needed.

• WordPress site returns 502 bad gateway

  Troubleshooting guide

  Fix a WordPress 502 bad gateway: check PHP-FPM worker health, fastcgi logs, worker and timeout settings, then verify via WP-CLI.

• Block themes vs classic themes in WordPress

  Reference guide

  Block themes vs classic themes: block themes use the Site Editor and template parts in the database, classic themes keep templates in the file system.

• Making WordPress bulk content edits safely

  Tutorial

  WordPress bulk content edits: bulk editor limits, the REST API and WP-CLI approaches, the standalone bulk editor, and safe rollback.

• Create a WordPress child theme

  Tutorial

  Create a WordPress child theme: the functions.php and style.css setup, why overrides stay safe, and update discipline.

• Configuring WordPress core auto-updates

  Reference guide

  Set up WordPress core auto-updates: what installs by default, how WP_AUTO_UPDATE_CORE and AUTOMATIC_UPDATER_DISABLED behave, and how version control changes the rules.

• WordPress database cleanup

  Tutorial

  Safe WordPress database cleanup: back up first, remove post revisions, transients, spam and autoloaded wp-options bloat, then optimize tables via WP-CLI.

• Profile slow WordPress database queries

  Troubleshooting guide

  How to find slow WordPress database queries with Query Monitor style tools and a few code-free checks.

• Headless WordPress setup guide

  Tutorial

  What headless WordPress is, how the REST API plus a static or framework front end works, and the trade-offs.

• WordPress .htaccess vs server config

  Reference guide

  When to put a WordPress rule in .htaccess versus the Apache or Nginx server config, with the trade-offs.

• WordPress image optimisation plugins compared

  Reference guide

  WordPress image optimisation plugins compared: compression, WebP and AVIF conversion, bulk operation, and why you should choose one plugin and not stack several.

• WordPress login redirect loop

  Troubleshooting guide

  WordPress login redirect loop fix: cookie mismatch, forced HTTPS redirect, hostname mismatch, and stale cache, in the order that resolves the loop.

• How WordPress maintenance mode works

  Reference guide

  How WordPress maintenance mode works: the .maintenance file, how updates enter and exit it, and the fix when a site is stuck in maintenance.

• WordPress media uploads failing

  Troubleshooting guide

  Why WordPress media uploads fail with an HTTP error, and the ordered fixes for uploads permissions, PHP upload_max_filesize, execution time and disk space.

• Managing WordPress media with WP-CLI

  Tutorial

  WP-CLI media tasks: wp media import, regenerate, attachment metadata, and clean unused images, with safety checks.

• How to raise the WordPress memory limit

  Troubleshooting guide

  Fatal "Allowed memory size exhausted" fix: raise WP_MEMORY_LIMIT in wp-config.php, check the host php.ini caps, then find what actually leaks memory.

• WordPress Multisite overview

  Reference guide

  Understand WordPress Multisite, subdomain and subdirectory networks, setup requirements, and when to use one.

• Redis and Memcached object caching for WordPress

  Reference guide

  WordPress object caching with Redis or Memcached: what the drop-in does, how to choose, and how to enable it safely.

• Isolating a WordPress plugin that breaks the site

  Troubleshooting guide

  Isolate the WordPress plugin breaking your site: disable all plugins at once, reactivate in halves via WP-CLI or filesystem, and read the fatal that names it.

• Fix a WordPress plugin conflict

  Troubleshooting guide

  Fix a WordPress plugin conflict: find the pair that fights, deactivate in groups, and use a staging copy to test the restored pair before shipping live.

• WordPress plugin update rollback safety

  Tutorial

  WordPress plugin update rollback safety: prepare for updates, limit the blast radius, and restore the previous plugin version quickly.

• WordPress plugin vs theme, which feature goes where

  Reference guide

  Decide whether a WordPress feature belongs in a plugin or a theme. Keep behaviour in plugins, presentation in themes, and avoid locking logic to a theme.

• Setting up real cron for WordPress

  Tutorial

  Move WordPress from wp-cron.php visiting-triggered scheduling to a real server cron so scheduled jobs and email run reliably.

• How to review WordPress release notes and plan an update

  Reference guide

  Reviewing WordPress release notes before updating, checking security fixes, compatibility, and testing steps.

• WordPress REST API basics

  Tutorial

  WordPress REST API basics explained: endpoints, authentication, and safe read/write examples that work on a default install.

• A WordPress REST route conflict explained

  Troubleshooting guide

  WordPress REST API route conflict: duplicate namespaces or routes, how to spot them, and how to fix conflicting endpoint registration.

• Restore WordPress from a backup

  Tutorial

  Restore WordPress from a backup: restore files before the SQL, fix wp-config credentials, then repair siteurl and home if the domain changed.

• WordPress user roles and capabilities explained

  Reference guide

  Understand WordPress roles and capabilities, the six default roles, what each can do, and how to grant targeted capabilities safely.

• WordPress search replace for domain and content changes

  Tutorial

  WordPress search replace: the serialized data trap, a safe dry-run method, and verifiable steps for domain and content changes.

• Security headers for WordPress

  Reference guide

  Security headers for WordPress: set HSTS, X-Frame-Options, X-Content-Type-Options and a CSP that does not break admin, uploads or inline assets.

• Using the WordPress Site Health tool

  Tutorial

  Use WordPress Site Health: run the Status checks, read the Info tab, copy the debug payload, and act on the recommendations it flags.

• Fix WordPress ERR_TOO_MANY_REDIRECTS

  Troubleshooting guide

  Where WordPress gets stuck in ERR_TOO_MANY_REDIRECTS, and the ordered fixes for double HTTPS, cached redirects, CDN SSL mode, htaccess and cookie loops.

• The WordPress troubleshooting order

  Reference guide

  The reliable WordPress troubleshooting order: debug log first, plugin and theme isolation, cache clearing, and database repair, with the tools for each step.

• WordPress update failed with 500

  Troubleshooting guide

  WordPress update failed with 500 fix: roll back the half-installed update, verify perms and disk, then update manually via WP-CLI.

• WordPress white screen of death

  Troubleshooting guide

  Recover from a blank white WordPress screen, the debugging order, memory limits, theme and plugin isolation, and how to see the real error.

• Advanced wp-config.php constants

  Reference guide

  Advanced wp-config.php constants: WP_MEMORY_LIMIT, DISALLOW_FILE_EDIT, SAVEQUERIES and the values that fix memory and security issues.

• WordPress wp-cron troubleshooting

  Troubleshooting guide

  WordPress wp-cron troubleshooting: how scheduled jobs fire, the causes of stuck cron, and how to switch to a real scheduler.

• Harden the WordPress login page

  Troubleshooting guide

  Practical hardening for wp-login.php, rate limits, two-factor, headers and clean ups that stop brute force and abuse.

• Managing wp-config.php with the WP-CLI config command

  Tutorial

  Manage wp-config.php constants with WP-CLI's config command, setting, reading, and listing values safely.

• Installing WordPress with WP-CLI

  Tutorial

  Install WordPress with WP-CLI: download the core, generate wp-config, install the database and a user, and verify the fresh install.

• Activate and manage themes with WP-CLI

  Tutorial

  Manage WordPress themes with WP-CLI: list, install, activate, switch, deactivate and update themes safely from the command line.

• WordPress XML sitemap setup with SEO plugins

  Tutorial

  WordPress XML sitemap plugins: Yoast and Rank Math generate dynamic sitemaps at /sitemap_index.xml. Avoid running two sitemap plugins at once.