[fw-mvc] using best zend filters

hi all

i have a text area for users to post reply or new tickets in my cms
i want to know what is best filters for filtering the input data of
users for more security ...?

im already using :
$filter->addFilter ( new Zend_filter_stripTags ( )
$filter->addFilter ( new Zend_Filter_StringTrim ( ) );

it enough ? or more needed?

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Sincerely
Sina Miandashti
MuSicBasE.ir & InvisionPower.ir Admin