Feature: #62944 - UserFunc available as Display Condition

See Issue #62944


Being able to use userFunc as displayCondition makes it possible to check on any imaginable condition or state. If any situation can not be evaluated with any of the existing checks the developer is free to add an own user function which provides a boolean result whether to show or hide the TCA field.

$GLOBALS['TCA']['tt_content']['columns']['bodytext']['displayCond'] = 'USER:Evoweb\\Example\\User\\ElementConditionMatcher->checkHeaderGiven:any:more:information';

Any parameters can be added (separated by colons) that are sent to the ConditionMatcher class.