Premium WordPress plugin developerhttps://www.dannyvankooten.com/https://www.dannyvankooten.com/blog/2010/ie-fix-for-html-5-elements/https://www.dannyvankooten.com/blog/2010/ie-fix-for-html-5-elements/How to fix HTML5 element rendering issues in Internet Explorer using JavaScript's createElement or the HTML5 shiv.Wed, 29 Dec 2010 00:00:00 GMThttps://www.dannyvankooten.com/blog/2011/codeigniter-sessions-in-ie7/https://www.dannyvankooten.com/blog/2011/codeigniter-sessions-in-ie7/Fixing CodeIgniter session issues in Internet Explorer 7 caused by underscores in the session cookie name.Mon, 31 Jan 2011 00:00:00 GMThttps://www.dannyvankooten.com/blog/2011/configuring-newsletter-sign-up-the-definitive-guide/https://www.dannyvankooten.com/blog/2011/configuring-newsletter-sign-up-the-definitive-guide/A definitive guide to downloading, installing and configuring the Newsletter Sign-Up WordPress plugin.Sun, 03 Jul 2011 00:00:00 GMThttps://www.dannyvankooten.com/blog/2011/dynamic-custom-menus-wordpress/https://www.dannyvankooten.com/blog/2011/dynamic-custom-menus-wordpress/How to dynamically assign different WordPress custom menus to specific pages or posts.Sun, 19 Jun 2011 00:00:00 GMThttps://www.dannyvankooten.com/blog/2011/enabling-shortcodes-in-widgets-quick-wordpress-tip/https://www.dannyvankooten.com/blog/2011/enabling-shortcodes-in-widgets-quick-wordpress-tip/A quick tip on enabling WordPress shortcodes in text widgets using a simple filter.Sun, 17 Jul 2011 00:00:00 GMThttps://www.dannyvankooten.com/blog/2011/php-routing-class-with-rest-routes/https://www.dannyvankooten.com/blog/2011/php-routing-class-with-rest-routes/A PHP routing class with REST routing support, inspired by the Ruby on Rails router.Wed, 30 Nov 2011 00:00:00 GMThttps://www.dannyvankooten.com/blog/2012/altorouter-php-routing-class/https://www.dannyvankooten.com/blog/2012/altorouter-php-routing-class/Introducing AltoRouter, a lightweight PHP5.3+ routing class with named routes and URL type restrictions.Tue, 31 Jul 2012 00:00:00 GMThttps://www.dannyvankooten.com/blog/2013/100-000-plugin-downloads-6-months-mailchimp-wordpress/https://www.dannyvankooten.com/blog/2013/100-000-plugin-downloads-6-months-mailchimp-wordpress/Mailchimp for WordPress reaches 100,000 downloads in under 6 months, a story that started from a hospital bed in Vietnam.Fri, 06 Dec 2013 00:00:00 GMThttps://www.dannyvankooten.com/blog/2013/add-mailchimp-sign-up-form-end-of-posts/https://www.dannyvankooten.com/blog/2013/add-mailchimp-sign-up-form-end-of-posts/A code snippet to automatically add a Mailchimp sign-up form to the end of all your WordPress posts.Fri, 04 Oct 2013 00:00:00 GMThttps://www.dannyvankooten.com/blog/2013/add-plain-html-social-sharing-links-posts/https://www.dannyvankooten.com/blog/2013/add-plain-html-social-sharing-links-posts/Adding lightweight HTML social sharing links for Twitter, Facebook and Google+ without heavy plugins.Mon, 02 Dec 2013 00:00:00 GMThttps://www.dannyvankooten.com/blog/2013/delay-scroll-handlers-javascript/https://www.dannyvankooten.com/blog/2013/delay-scroll-handlers-javascript/Why and how to debounce scroll and resize event handlers in JavaScript for better performance.Thu, 14 Nov 2013 00:00:00 GMThttps://www.dannyvankooten.com/blog/2013/goals-for-2013/https://www.dannyvankooten.com/blog/2013/goals-for-2013/My personal and work-related goals for 2013, written down and shared publicly for accountability.Wed, 02 Jan 2013 00:00:00 GMThttps://www.dannyvankooten.com/blog/2013/mailchimp-newsletter-checkbox-contact-form-7/https://www.dannyvankooten.com/blog/2013/mailchimp-newsletter-checkbox-contact-form-7/Adding a Mailchimp newsletter sign-up checkbox to Contact Form 7 forms, without writing any code.Wed, 25 Sep 2013 00:00:00 GMThttps://www.dannyvankooten.com/blog/2013/my-newest-wordpress-plugin-mailchimp-for-wp/https://www.dannyvankooten.com/blog/2013/my-newest-wordpress-plugin-mailchimp-for-wp/Announcing my newest WordPress plugin: Mailchimp for WordPress, providing easy Mailchimp integration.Fri, 28 Jun 2013 00:00:00 GMThttps://www.dannyvankooten.com/blog/2013/only-load-contact-form-7-scripts-when-needed/https://www.dannyvankooten.com/blog/2013/only-load-contact-form-7-scripts-when-needed/A WordPress snippet to only load Contact Form 7 scripts and styles on pages that actually contain a form.Sat, 14 Dec 2013 00:00:00 GMThttps://www.dannyvankooten.com/blog/2013/show-mailchimp-sign-up-checkbox-in-checkout-forms/https://www.dannyvankooten.com/blog/2013/show-mailchimp-sign-up-checkbox-in-checkout-forms/How to add a Mailchimp newsletter sign-up checkbox to your WooCommerce or e-commerce checkout forms.Thu, 12 Sep 2013 00:00:00 GMThttps://www.dannyvankooten.com/blog/2013/wordpress-plugin-structure-dont-load-unnecessary-code/https://www.dannyvankooten.com/blog/2013/wordpress-plugin-structure-dont-load-unnecessary-code/Structuring WordPress plugins to conditionally load code and avoid loading unnecessary files.Wed, 20 Nov 2013 00:00:00 GMThttps://www.dannyvankooten.com/blog/2014/2014-year-in-review/https://www.dannyvankooten.com/blog/2014/2014-year-in-review/Looking back at 2014, a year of growth and new opportunities.Sat, 27 Dec 2014 00:00:00 GMThttps://www.dannyvankooten.com/blog/2014/a-new-site-built-on-ghost/https://www.dannyvankooten.com/blog/2014/a-new-site-built-on-ghost/Rebuilding my personal website on Ghost, the Node.js blogging platform.Sat, 23 Aug 2014 00:00:00 GMThttps://www.dannyvankooten.com/blog/2014/data-type-inconsistencies-in-wordpress/https://www.dannyvankooten.com/blog/2014/data-type-inconsistencies-in-wordpress/Exploring data type inconsistencies in WordPress and the pitfalls of PHP's weak typing.Thu, 02 Oct 2014 00:00:00 GMThttps://www.dannyvankooten.com/blog/2014/multiple-form-themes-in-mailchimp-for-wordpress-pro/https://www.dannyvankooten.com/blog/2014/multiple-form-themes-in-mailchimp-for-wordpress-pro/Mailchimp for WordPress Pro now supports multiple form themes through the Styles Builder.Mon, 25 Aug 2014 00:00:00 GMThttps://www.dannyvankooten.com/blog/2014/periodically-check-wp-core-file-modifications/https://www.dannyvankooten.com/blog/2014/periodically-check-wp-core-file-modifications/Using WP-CLI's verify-checksums command to detect unauthorized modifications to WordPress core files.Sat, 11 Oct 2014 00:00:00 GMThttps://www.dannyvankooten.com/blog/2014/version-2-of-mailchimp-for-wordpress/https://www.dannyvankooten.com/blog/2014/version-2-of-mailchimp-for-wordpress/Version 2.0 of Mailchimp for WordPress brings CAPTCHA field support and other improvements.Wed, 30 Apr 2014 00:00:00 GMThttps://www.dannyvankooten.com/blog/2015/celebrating-2-million-downloads-for-mc4wp/https://www.dannyvankooten.com/blog/2015/celebrating-2-million-downloads-for-mc4wp/Celebrating the 2 million downloads milestone for the Mailchimp for WordPress plugin.Wed, 09 Sep 2015 00:00:00 GMThttps://www.dannyvankooten.com/blog/2015/interview-on-nomadlist/https://www.dannyvankooten.com/blog/2015/interview-on-nomadlist/My interview on NomadList about life as a digital nomad and choosing travel destinations.Thu, 07 May 2015 00:00:00 GMThttps://www.dannyvankooten.com/blog/2015/interview-on-webworktravel/https://www.dannyvankooten.com/blog/2015/interview-on-webworktravel/My interview with WebWorkTravel about working remotely and traveling as a WordPress developer.Fri, 13 Mar 2015 00:00:00 GMThttps://www.dannyvankooten.com/blog/2015/introducing-ibericode/https://www.dannyvankooten.com/blog/2015/introducing-ibericode/Announcing ibericode as the new company name for my WordPress plugin business.Fri, 19 Jun 2015 00:00:00 GMThttps://www.dannyvankooten.com/blog/2015/one-million-downloads-mailchimp-wordpress/https://www.dannyvankooten.com/blog/2015/one-million-downloads-mailchimp-wordpress/Mailchimp for WordPress crosses the one million downloads milestone in less than two years.Sun, 15 Feb 2015 00:00:00 GMThttps://www.dannyvankooten.com/blog/2015/using-a-cdn-with-wordpress/https://www.dannyvankooten.com/blog/2015/using-a-cdn-with-wordpress/A lightweight WordPress plugin for rewriting asset URLs to serve them from a CDN.Fri, 22 May 2015 00:00:00 GMThttps://www.dannyvankooten.com/blog/2016/browserpass-for-firefox/https://www.dannyvankooten.com/blog/2016/browserpass-for-firefox/Browserpass, the browser extension for the Pass password manager, is now available for Firefox.Mon, 28 Nov 2016 00:00:00 GMThttps://www.dannyvankooten.com/blog/2016/chrome-extension-for-pass/https://www.dannyvankooten.com/blog/2016/chrome-extension-for-pass/Introducing Browserpass, a Chrome extension for accessing the Pass password store from your browser.Sun, 06 Nov 2016 00:00:00 GMThttps://www.dannyvankooten.com/blog/2017/2016-year-in-review/https://www.dannyvankooten.com/blog/2017/2016-year-in-review/Looking back at 2016, from travel adventures to running a WordPress plugin business.Sun, 15 Jan 2017 00:00:00 GMThttps://www.dannyvankooten.com/blog/2017/html-forms-wordpress/https://www.dannyvankooten.com/blog/2017/html-forms-wordpress/Introducing HTML Forms, a WordPress plugin for creating forms using native HTML markup.Wed, 01 Nov 2017 00:00:00 GMThttps://www.dannyvankooten.com/blog/2017/laravel-to-golang/https://www.dannyvankooten.com/blog/2017/laravel-to-golang/Why and how I rewrote a Laravel PHP application in Go for better performance and simplicity.Mon, 17 Apr 2017 00:00:00 GMThttps://www.dannyvankooten.com/blog/2017/vatmoss-in-practice/https://www.dannyvankooten.com/blog/2017/vatmoss-in-practice/Practical tips for dealing with EU VATMOSS rules when selling digital products online.Mon, 03 Apr 2017 00:00:00 GMThttps://www.dannyvankooten.com/blog/2018/backtesting-12-month-sma-investing-strategy-pandas/https://www.dannyvankooten.com/blog/2018/backtesting-12-month-sma-investing-strategy-pandas/Backtesting a 12-month Simple Moving Average investing strategy against buy-and-hold using Python and Pandas.Wed, 24 Jan 2018 00:00:00 GMThttps://www.dannyvankooten.com/blog/2018/join-mastodon/https://www.dannyvankooten.com/blog/2018/join-mastodon/Why I'm moving to Mastodon, a decentralized and less toxic alternative to Twitter.Tue, 14 Aug 2018 00:00:00 GMThttps://www.dannyvankooten.com/blog/2018/reviving-ana-as-fathom/https://www.dannyvankooten.com/blog/2018/reviving-ana-as-fathom/Reviving the open-source Ana analytics project as Fathom, a simple and privacy-focused alternative to Google Analytics.Sat, 12 May 2018 00:00:00 GMThttps://www.dannyvankooten.com/blog/2019/from-go-back-to-php-again/https://www.dannyvankooten.com/blog/2019/from-go-back-to-php-again/After two years on Go, moving our shop applications back to PHP.Mon, 04 Feb 2019 00:00:00 GMThttps://www.dannyvankooten.com/blog/2019/goals-for-2020/https://www.dannyvankooten.com/blog/2019/goals-for-2020/My personal and professional goals for 2020.Tue, 31 Dec 2019 00:00:00 GMThttps://www.dannyvankooten.com/blog/2019/introducing-koko-analytics/https://www.dannyvankooten.com/blog/2019/introducing-koko-analytics/Introducing Koko Analytics, a privacy-friendly analytics plugin for WordPress.Thu, 07 Nov 2019 00:00:00 GMThttps://www.dannyvankooten.com/blog/2019/stepping-down-fathom-maintainer/https://www.dannyvankooten.com/blog/2019/stepping-down-fathom-maintainer/Why I'm stepping down as maintainer of the open-source Fathom analytics project.Mon, 18 Mar 2019 00:00:00 GMThttps://www.dannyvankooten.com/blog/2020/website-carbon-emissions/https://www.dannyvankooten.com/blog/2020/website-carbon-emissions/How optimizing code used on millions of websites can reduce global CO2 emissions by tens of thousands of kilograms per month.Tue, 04 Feb 2020 00:00:00 GMThttps://www.dannyvankooten.com/blog/2020/writing-an-interpreter-compiler/https://www.dannyvankooten.com/blog/2020/writing-an-interpreter-compiler/Building a bytecode interpreter and virtual machine in C for the Monkey programming language.Fri, 06 Mar 2020 00:00:00 GMThttps://www.dannyvankooten.com/blog/2021/solving-advent-of-code-2020-under-1-second/https://www.dannyvankooten.com/blog/2021/solving-advent-of-code-2020-under-1-second/Solving all Advent of Code 2020 challenges in C with a total runtime under one second.Fri, 02 Apr 2021 00:00:00 GMThttps://www.dannyvankooten.com/blog/2022/minifying-top-websites/https://www.dannyvankooten.com/blog/2022/minifying-top-websites/Analyzing the minification potential and cache directives of the most popular websites on the internet.Tue, 29 Nov 2022 00:00:00 GMThttps://www.dannyvankooten.com/blog/2022/rewriting-interpreter-rust/https://www.dannyvankooten.com/blog/2022/rewriting-interpreter-rust/Rewriting my Monkey language interpreter in Rust, fighting the borrow checker and aiming for C-level performance.Thu, 17 Nov 2022 00:00:00 GMThttps://www.dannyvankooten.com/blog/2023/climate-friendly-software/https://www.dannyvankooten.com/blog/2023/climate-friendly-software/Thoughts on building climate-friendly software: pick low-carbon datacenters, optimize for performance and battery life.Wed, 13 Dec 2023 00:00:00 GMThttps://www.dannyvankooten.com/blog/2023/koko-analytics-pro/https://www.dannyvankooten.com/blog/2023/koko-analytics-pro/Launching Koko Analytics Pro with custom event tracking for WordPress sites.Wed, 18 Oct 2023 00:00:00 GMThttps://www.dannyvankooten.com/blog/2023/rector-annotations-to-attributes/https://www.dannyvankooten.com/blog/2023/rector-annotations-to-attributes/Using Rector to automatically convert Doctrine annotations to native PHP 8 attributes in a Symfony project.Mon, 10 Jul 2023 00:00:00 GMThttps://www.dannyvankooten.com/blog/2023/resize-downsample-video-ffmpeg/https://www.dannyvankooten.com/blog/2023/resize-downsample-video-ffmpeg/Using ffmpeg to resize, downsample and prepare videos for uploading to Mastodon.Thu, 02 Nov 2023 00:00:00 GMThttps://www.dannyvankooten.com/blog/2023/rfc822-and-cet/https://www.dannyvankooten.com/blog/2023/rfc822-and-cet/A peculiarity with RFC822 formatted datetimes and the CET timezone in Go's time package.Wed, 22 Nov 2023 00:00:00 GMThttps://www.dannyvankooten.com/blog/2023/speeding-up-koko-analytics-dashboard/https://www.dannyvankooten.com/blog/2023/speeding-up-koko-analytics-dashboard/Reducing page weight of the Koko Analytics dashboard by over 95% by dropping React for vanilla JavaScript.Tue, 31 Oct 2023 00:00:00 GMThttps://www.dannyvankooten.com/blog/2023/top-websites-not-using-compression/https://www.dannyvankooten.com/blog/2023/top-websites-not-using-compression/Checking the top 10,000 websites for HTTP compression and finding that about 8% don't use any compression at all.Mon, 27 Nov 2023 00:00:00 GMThttps://www.dannyvankooten.com/blog/2024/1brc/https://www.dannyvankooten.com/blog/2024/1brc/My approach to the One Billion Rows Challenge in C, using POSIX threads and custom hash maps.Thu, 04 Jan 2024 00:00:00 GMThttps://www.dannyvankooten.com/blog/2024/calc-fullscreen-elements/https://www.dannyvankooten.com/blog/2024/calc-fullscreen-elements/Using CSS calc, min and max functions to create full-width elements inside a centered container.Tue, 02 Jan 2024 00:00:00 GMThttps://www.dannyvankooten.com/blog/2024/cpp-development-setup/https://www.dannyvankooten.com/blog/2024/cpp-development-setup/My C++ development setup using Sublime Text 4 with Clangd as the language server.Sat, 06 Apr 2024 00:00:00 GMThttps://www.dannyvankooten.com/blog/2024/migrating-doctrine-database-sqlite-to-mysql/https://www.dannyvankooten.com/blog/2024/migrating-doctrine-database-sqlite-to-mysql/A step-by-step guide to migrating a Doctrine database from SQLite to MySQL in a Symfony application.Sat, 22 Jun 2024 00:00:00 GMThttps://www.dannyvankooten.com/blog/2024/sourcehut-pages-domain-redirect/https://www.dannyvankooten.com/blog/2024/sourcehut-pages-domain-redirect/How to set up a domain redirect on sourcehut pages using HTML meta refresh and JavaScript.Mon, 12 Feb 2024 00:00:00 GMThttps://www.dannyvankooten.com/blog/2024/static-site-hosting-vps/https://www.dannyvankooten.com/blog/2024/static-site-hosting-vps/Setting up a cheap VPS with Caddy for hosting static sites, as documentation for future reference.Tue, 20 Feb 2024 00:00:00 GMThttps://www.dannyvankooten.com/blog/2025/benchmarking-scandir-glob-directoryiterator-readdir-php/https://www.dannyvankooten.com/blog/2025/benchmarking-scandir-glob-directoryiterator-readdir-php/Benchmarking scandir, readdir, glob and DirectoryIterator for listing files in a directory in PHP.Tue, 02 Sep 2025 00:00:00 GMThttps://www.dannyvankooten.com/blog/2025/building-privacy-friendly-website-analytics/https://www.dannyvankooten.com/blog/2025/building-privacy-friendly-website-analytics/Building a standalone version of Koko Analytics for non-WordPress sites, using PHP with MySQL, PostgreSQL or SQLite.Thu, 16 Jan 2025 00:00:00 GMThttps://www.dannyvankooten.com/blog/2025/composer-php-version-alpine-linux/https://www.dannyvankooten.com/blog/2025/composer-php-version-alpine-linux/Fixing Composer using the wrong PHP version on Alpine Linux due to a hardcoded shebang in the composer package.Wed, 10 Sep 2025 00:00:00 GMThttps://www.dannyvankooten.com/blog/2025/pensioenbeleggen-hoeveel-jaarruimte-benutten/https://www.dannyvankooten.com/blog/2025/pensioenbeleggen-hoeveel-jaarruimte-benutten/Hoeveel jaarruimte benutten voor pensioenbeleggen als zelfstandige? Een methode om tot een redelijk bedrag te komen.Tue, 07 Oct 2025 00:00:00 GMThttps://www.dannyvankooten.com/blog/2026/using-phpactor-with-wordpress/https://www.dannyvankooten.com/blog/2026/using-phpactor-with-wordpress/Configuring phpactor as a language server for WordPress development by setting up include patterns for core files.Thu, 26 Feb 2026 00:00:00 GMT