Seit 2012 blogge ich auf www.derhansen.de über Themen aus meinem Arbeitsalltag, welche ich mit der Allgemeinheit teilen möchte, um anderen evtl. dadurch zu helfen. Zuerst habe ich in deutscher Sprache meine Artikel geschrieben, bin dann aber dazu übergegangen, meine Artikel in englischer Sprache zu verfassen, um eine größere Zielgruppe anzusprechen.
Sunday, February 01, 2026 – t3versions, bot, headless browser, api, ai
How to not use the t3versions website
TL;DR: Don’t Scrape - Use the APIInstead of building a bot to execute t3versions domain checks via a headless browser, just request an API key and use it. It’s faster, more reliable, and won’t get you banned.What is t3versions?About eight years ago, I created t3versions as a simple tool to identify websites using the TYPO3 CMS. When a site is…
Tuesday, December 30, 2025 – Icinga 2, performance data
No performance data from Icinga 2 to InfluxDB and how to possibly fix it
TL;DR: In Icinga Web 2, navigate to Toggle Menu > Health, click on the Icinga DB Instance, and ensure that Performance Data is enabled.Icinga 2 and performance dataI use several own servers to run various services like my own TYPO3 website, my GitLab instance, and otherapplications I use for my daily work. When maintaining own servers and…
Friday, October 24, 2025 – flux, container, TYPO3
How to use flux and container extension in one TYPO3 system
TYPO3 is well known for its flexibility, extensibility, and sustainability. It is not uncommon to find TYPO3 installations that were originally built many years ago and which are still actively maintained and updated today. In some of those older setups, site layouts and content elements were implemented using the wellknown flux extension.As…
Sunday, October 12, 2025 – powermail, spam, challenge response
My new TYPO3 extension "powermail_crshield" is available
Back in July 2022, I released the TYPO3 extension form_crshield, a lightweight solution that adds a challenge/response layer to TYPO3 forms created with ext:forms to protect them fromautomated spam submissions. Since then, the extension has been downloaded more than 140,000 times, proving that theapproach works well for many TYPO3 integrators…
Sunday, January 12, 2025 – macbook, copy, files
How to efficiently transfer a huge amount of files from one MacBook to another
As a web developer working on various projects, I often deal with project sources that include tens or even hundreds of thousands of files. This happens because modern development environments, especially those using Node.js or PHP, rely on extensive package ecosystems. These packages, installed from source, often contain a massive number of…
Tuesday, December 31, 2024 – TYPO3, doctrine, ordering, querybuilder, extbase, repository
Sorting by UIDs with MySQL FIELD function in TYPO3 13.4+ using Doctrine DBAL 4
Back in 2017, I wrote this blogpost about how to use the MySQL FIELD function in TYPO3 with Doctrine DBAL. The function is used to applya special ordering of records by a given list of uids (e.g. from FlexForm) to a query using QueryBuilder and then uses the extbase datamapper to transform the raw Doctrine query result to an array of domain…
Monday, September 23, 2024 – TYPO3, extend backend module, extbase, action
Extending an existing extbase backend module with a custom action in TYPO3 v12+
One part I really like about TYPO3 is its extendability. The TYPO3 core and its APIs contain many PSR-14 events and hooks, which developers can use to customize or extend the functionality of the system. My TYPO3 extension sf_event_mgt has an extbase based backend module, which allows editors to manage events and event registrations. It is for…
Friday, July 26, 2024 – tObserver, TYPO3 Monitoring
tObserver TYPO3 monitoring service shutdown
TL;DR: My free TYPO3 monitoring service tObserver will shut down on 1st of August 2024The evolution of tObserverBack in 2015 I was working for a company which provided TYPO3 website development and hosting. We had to manage hundreds of TYPO3 websites and with each TYPO3 core or extension security update, we had to identify, which of our managed…
Sunday, June 16, 2024 – email, double opt-in, double opt-out, tripple opt-in, tripple opt-out, email security
From double to tripple: Preventing unintended opt-in / opt-out confirmations
Today, double opt-in is the de facto standard for web services that require user subscriptions. This process is commonly used for newsletter sign-ups, user account creation or event registration/cancellation.A typical double opt-in process works as following: Users sign up for a service (e.g. newsletter) by entering their email address The…
Tuesday, December 12, 2023 – sentry, typo3, debugging
TYPO3 Sentry Integration: Testing and Debugging with cURL
Configuring the TYPO3 extension sentry_client is a straightforward process that ensures seamless integration with Sentry, the robust error tracking and monitoring platform. Once the sentry_client extension is configured, it becomes crucial to verify whether Sentry is successfully receiving events from your TYPO3 instance. The documentation…
Tuesday, October 03, 2023 – typo3, querybuilder, slow, xdebug, profiling
The pitfalls of reusing TYPO3 QueryBuilder: Analyzing a performance bottleneck
TL;DR: Do never reuse an instance of the TYPO3 QueryBuilder for queries, even if the query is the same but with different parameters, since this causes a significant performance decreasement when processing larger amount of records.I was recently involved in refactoring an older codebase in a TYPO3 project. One part of that codebase was a data…
Thursday, September 14, 2023 – typo3, image processing, distorted image, exif
The significance of the PHP exif module in TYPO3 and why it should always be enabled
TL;DR: If using original portrait images created with modern camera systems, you should ensure that the PHP exif module is active, so that portrait images do not get distorted.People who know me most likely also know, that I like to work on challenging and complex TYPO3 tasks. Yesterday, I faced an unusual situation in TYPO3, which took me some…