See What a PHP Upgrade Will Break Before Your Host Does It for You
Test a PHP upgrade on staging: debug log, money paths, forced cron and imports, reading the log, and a PHPCompatibilityWP scan.
Debugging & Profiling15 min read
Category: Debugging & Profiling
Fatal Error After Updating to WordPress 7.1.1 with Composer: What Broke and How to Fix It
The Composer package for WordPress 7.1.1 and 7.0.5 was published without wp-includes, so a deploy of the security release leaves every request fatal on wp-settings.php line 34. How to confirm it, three ways back online, and the build-time guard that stops the next one.
Debugging & Profiling11 min read
Outdated SQL Server in Site Health After WordPress 7.1
WordPress 7.1 raised its MariaDB recommendation from 10.6 to 10.11, so Site Health now flags servers that reached end of life in July. MySQL 8.0 is end of life too, but still passes. How to check what you run and upgrade safely.
Debugging & Profiling11 min read
WordPress HTTP Error on Media Upload: The Seven Real Causes
WordPress answers a failed upload with two words and no detail. Here are the seven causes that account for almost every case, the fingerprint each one leaves, and the three logs that hold the real error.
Debugging & Profiling12 min read
Core Trimmed Its PHPUnit Matrix. Do the Same to Yours.
Core cut its PHPUnit matrix by 52 percent and halved its rerun rate. How to apply the same reasoning to a plugin test suite.
Code Snippets10 min read
WordPress Memory Limit: WP_MEMORY_LIMIT vs PHP memory_limit Explained
WP_MEMORY_LIMIT and PHP memory_limit look similar but operate at different layers. This guide explains how they interact, what WP_MAX_MEMORY_LIMIT does for admin requests, how memory_get_peak_usage() reveals the truth, and the four situations where WordPress silently ignores your settings entirely.
Debugging & Profiling12 min read
30 Essential wp-config.php Constants Every WordPress Developer Should Know
A complete categorized reference to every important wp-config.php constant: debug, memory, performance, security, paths, cron, multisite, and more. With real code examples for development, staging, and production environments.
Debugging & Profiling13 min read
WordPress White Screen of Death: How to Fix It Fast
The WordPress White Screen of Death (WSOD) shows a blank page with no error message. This step-by-step guide covers enabling WP_DEBUG, fixing memory limits, isolating plugin and theme conflicts, using WordPress Recovery Mode, and preventing WSOD from happening again.
Debugging & Profiling14 min read
How to Debug WordPress AJAX Requests (admin-ajax.php Troubleshooting)
Learn how to debug WordPress AJAX requests step by step. Covers the admin-ajax.php flow, wp_ajax_* hooks, nonce failures, Network tab inspection, wp_send_json_success usage, DOING_AJAX constant, and a complete troubleshooting workflow with PHP and JavaScript code examples.
Debugging & Profiling14 min read
WordPress WP-Cron Not Running? How to Debug Scheduled Tasks
WP-Cron stops running silently and the cause is almost always a stuck lock, a blocked loopback request, or DISABLE_WP_CRON set without a server cron replacement. This guide covers the full diagnostic flow with WP-CLI, _get_cron_array(), WP_CRON_LOCK_TIMEOUT, object cache conflicts, and real cron setup.
Debugging & Profiling13 min read
How to Read WordPress Error Logs: PHP Fatal, Warning, Notice, Deprecated
WordPress error logs stop being intimidating once you understand their structure. This guide decodes every PHP error severity level (Fatal, Warning, Notice, Deprecated, Parse), shows how to read stack traces, documents the most common WordPress-specific errors with root causes and fixes, explains error_reporting levels, and covers log security and rotation.
Debugging & Profiling13 min read
Query Monitor for WordPress: Complete Developer Tutorial (Every Panel Explained)
Query Monitor is not just a queries plugin - it is a complete execution inspector for every WordPress request. This tutorial explains every panel: Queries (duplicates, slow queries, component filter), Hooks, HTTP API, PHP Errors, Scripts and Styles, Languages, Conditionals, Environment, Capabilities, Blocks, Caches, and REST API. Real debugging workflows with each panel.
Debugging & Profiling14 min read
