Dev

Dev log Performance Core Web Vitals in plain English: LCP, INP and CLS What the three Core Web Vitals measure, the numbers that count as good, how to measure them on real visitors, and the fixes that help most on WordPress sites. September 25, 2026 · 5 min read

Dev log Security Security headers for WordPress, without a plugin Five HTTP headers that close common holes in a WordPress site. The few lines of PHP I use to send them, and how to check they work. September 25, 2026 · 4 min read

Dev log Accessibility WCAG 2.2: the nine new success criteria and how to meet them WCAG 2.2 added nine new rules and removed one. Here is what each new rule asks for, which ones count at level AA, and the code I use to meet them. September 25, 2026 · 6 min read

Dev log SEO & AI search How AI search finds your site: crawlers, robots.txt and llms.txt AI answers start with a crawler. I explain which bots fetch your pages, which ones train models, and how I let AI search in without giving away content. September 25, 2026 · 5 min read

Dev log Shopify Fix the Shopify app ERR_INVALID_ARG_TYPE “key” error The "key argument must be of type string... Received undefined" error in a Shopify app means your API secret isn't loaded. I explain why, and how to fix it. April 28, 2020 · 4 min read

Dev log PHP How to increase the PHP memory limit (and WordPress too) Fix "Allowed memory size exhausted" by raising memory_limit in php.ini, .user.ini or .htaccess, or WP_MEMORY_LIMIT in wp-config.php. Then check which one wins. February 15, 2020 · 4 min read

Dev log WordPress How to add /blog/ to WordPress post URLs Put /blog/ in front of every post URL with a custom permalink structure. Keep custom post types out of it with with_front, and keep old links working. January 20, 2020 · 3 min read

Dev log Git Git warning: LF will be replaced by CRLF, and how to fix it Git is converting line endings, usually because core.autocrlf is true on Windows. It's harmless, and a .gitattributes file fixes it for the whole team. July 17, 2019 · 5 min read

Dev log WordPress How to find the WordPress version of any site Six ways to find which WordPress version a site runs, from the dashboard and WP-CLI to the page source and feed. Plus why hiding the version is not real security. April 17, 2019 · 4 min read

Dev log JavaScript Gulp for Sass and JavaScript: a modern gulpfile A Gulp 5 setup that compiles Sass, bundles and minifies JavaScript, adds source maps and watches for changes. Copy it into a WordPress theme or any project. April 5, 2019 · 4 min read