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Form fields are input fields of a HTML form, that are available in Joomla, that can be used to create forms or the extensions interface where users can adjust settings. There are several standard Form Field Types available, while there is support for building custom ones if needed.

Form fields are input fields of a HTML form, that are available in Joomla 2.5 and later.

There are several standard Form Field Types available, while there is support for building custom ones if needed. Each form field type is a subclass of JFormField.

This way Joomla provides a "template interface", for a quick and easy way to create forms, where users can submit data into the database.

These input fields are also used by Joomla extensions extensions (and actually everywhere in the administration site) to create the interface where users can enter content or configure the extension, adjust settings, etc.

Some Common form field types:

  • Text
  • Textarea
  • Radio
  • List
  • Checkbox
  • Media
  • Menu
  • Category
  • Access Level

and more...

Documentation:

List of Standard Form Field Types: https://docs.joomla.org/Standard_form_field_types

Form Fields: https://docs.joomla.org/Form_field

JFormField API: https://api.joomla.org/cms-3/classes/JFormField.html

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