JHTML-NONPUBLIC-001

JHtml::_('behavior.caption') internals

JHtml::_() calling a non-public helper

Joomla 4 made many JHtml helper methods non-public. Calls that worked as undocumented internals fatal with visibility errors.

JHtml::_('behavior.caption') internals → Public HTMLHelper methods / WebAssetManager only

Dies at Joomla 3 → 4J3: Works nativelyJ4: Removed — fatalJ6: Removed — fatalBC plugin: no — already dead on J4You rewrite thisJoomla API

What you will see

  • Call to protected method
  • Call to private method
  • Call to undefined method

Symptoms people search

html helper protected · behavior helper fatal

Replace this code

Swap JHtml::_('behavior.caption') internals for Public HTMLHelper methods / WebAssetManager only.

Joomla 3

Remove or stop calling this

JHtml::_('behavior.caption');
JHtml::_('somehelper._hiddenMethod');

Joomla 4 / 6

Use this instead

// Only call documented public helpers.
HTMLHelper::_('calendar', $value, $name, $id);

How to fix it

  1. 1If the helper is not in the Joomla 4 HTMLHelper docs, stop calling it.
  2. 2Load the equivalent as a WAM asset.

Also known as

JHtml::_ non-public · protected helper

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