Joomla! ドキュメンテーション

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The checkbox form field type provides a single checkbox. If the parameter has a saved value this is selected when the page is first loaded. If not, the default value (if any) is selected.

• type (mandatory) must be checkbox
• name (mandatory) is the unique name of the parameter.
• label (mandatory) (translatable) is the descriptive title of the field.
• value (optional) is the value of the parameter if this checkbox is set (usually 1).
• default (optional) is the default value (usually 0 or 1).
• description (optional) (translatable) is text that will be shown as a tooltip when the user moves the mouse over the label.
• class (optional) is a CSS class name for the HTML form field. If omitted this will default to 'inputbox'.

Example XML field definition:

<field name="show_title" type="checkbox" label="Show title" description="Show the title of the item" value="1" />

Example XML field definition (unchecked):

<field name="show_title" type="checkbox" label="Show title" description="Show the title of the item" value="1" default="0" />

 Warning!

Special care needs to be taken with saving a checkbox from a form!! This is a common mistake.
You see, on saving a form with a checkbox that is unchecked, there is no variable for it in the POST information and joomla does not take care of that yet!
See Discussion on this page for more.

See also

• List of standard form field types