How to put if,elseif,else statements while building sql in Zend_db_Select

Question

For example:

if(!empty($this->_request->getParam('gadi_from'))) {$select->where('a.gadi > ?',trim((int)$this->_request->getParam('gadi_from')));}

if(!empty($this->_request->getParam('gadi_to'))) {$select->where('a.gadi < ?',trim((int)$this->_request->getParam('gadi_to')));}

But the problem is, it's isn't working that way. :)

I'm getting this error: Fatal error: Can't use method return value in write context in C: bla-bla-bla on line bla-bla-bla :)

This variant is working:

$gadi_from = trim((int)$this->_request->getParam('gadi_from'));
    $gadi_to = trim((int)$this->_request->getParam('gadi_to'));

    if(!empty($gadi_from)) {$select->where('a.gadi > ?',$gadi_from );}
    if(!empty($gadi_to)) {$select->where('a.gadi < ?',$gadi_to );}

Answer 1

Comments helped, closed.