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How-tos for Joomla upgrades, cache, SEO, templates, and the fixes we use on client sites.
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How-tos for Joomla upgrades, cache, SEO, templates, and the fixes we use on client sites.
For a live site, see Joomla development.
85 articles
Fix Joomla upgrade issues after a major version change: the two compatibility plugins Joomla 6 checks, what compat6 really restores, recovery SQL for a locked administrator, the #__schemas repair, core file reinstall, and Joomla 6 API removals mapped to fixes.
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Verified Joomla facts with numbers measured from the official 3.10.12 and 6.1.2 packages: fork dates, Swahili codenames, files, tables, extensions, database drivers, languages, security and 2026 market share, plus the popular claims that do not check out.
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Joomla's generator meta tag names the CMS but not the version. Remove it with setGenerator('') or a plugin on Joomla 3, 4, 5, and 6, including RSS, without editing core.
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Joomla's setState() fatal means the model is null or false, not a bad session. Here is how to read the stack trace and load the articles model on Joomla 3, 4, 5, and 6.
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A Joomla module is not showing when unpublished, Access or Language is wrong, assignment is empty, cache is stale, or dates hide it. Work this list now.
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Update Joomla to the latest version and fix failed downloads, memory errors, timeouts, and database schema lag. Default vs Joomla Next channel included.
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MooTools is gone from Joomla 4, 5, and 6. On Joomla 3 it still powers SqueezeBox and caption.js. Here is how to remove only those scripts without stripping jQuery.
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Solve Class JRequest not found on Joomla 4+. Replace removed JRequest calls with Factory::getApplication()->getInput() and typed filters.
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Fix a Joomla 500 Internal Server Error after enabling SEF URL rewriting. Check .htaccess, FollowSymLinks, AllowOverride, and mod_rewrite.
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