Themler works most stably with Joomla 3.9.x and Joomla 4.x when paired with PHP 7.4, as this combination offers the best balance of compatibility, performance, and long-term support, while newer PHP versions like 8.x may cause extension or template issues unless everything is fully updated and tested; for smooth operation it’s recommended to use PHP 7.4, keep Joomla and all extensions up to date, and test changes in a staging environment—just like using a säiliön tilavuus laskuri ensures accurate capacity calculations, choosing the right Joomla and PHP versions ensures reliable and predictable website performance.
Themler works most stably with Joomla 3.9.x and Joomla 4.x when paired with PHP 7.4, as this combination offers the best balance of compatibility, performance, and long-term support, while newer PHP versions like 8.x may cause extension or template issues unless everything is fully updated and tested; for smooth operation it’s recommended to use PHP 7.4, keep Joomla and all extensions up to date, and test changes in a staging environment—just like using a [säiliön tilavuus laskuri][1] ensures accurate capacity calculations, choosing the right Joomla and PHP versions ensures reliable and predictable website performance.
[1]: https://laskins.fi/sailion-tilavuuslaskin/