Form element name or array of such names. Special name '__ALL__' means all the form elements.
Callback, either function name or array(&$object, 'method')
Table 31-1. Possible PEAR_Error values
| Error code | Error message | Reason | Solution |
|---|---|---|---|
| QUICKFORM_NONEXIST_ELEMENT | Element '$elName' does not exist in HTML_QuickForm::applyFilter() | Tried to apply a filter to a non-existant element | Check the element's name spelling |
| QUICKFORM_INVALID_FILTER | Callback function does not exist in QuickForm::applyFilter() | Tried to pass a name of a non-existant function as a callback | Check spelling |