public function setExt($ext) {
        if ($ext) {
            $this->env['EXT'] = '.'.ltrim($ext, '.');
        } else {
            $this->env['EXT'] = '';
        }
        return $this;
    }
public function setExt($ext) {
        if ($ext) {
            $this->env['EXT'] = '.'.ltrim($ext, '.');
        } else {
            $this->env['EXT'] = '';
        }
        return $this;
    }
public function setExt ( $ ext ) { if ( $ ext ) { $ this -> env [ 'EXT' ] = '.' . ltrim ( $ ext , '.' ) ; } else { $ this -> env [ 'EXT' ] = '' ; } return $ this ; }
Sets the file extension of the request.

@param string $ext The file extension to set.
@return Request Returns $this for fluent calls.
Sets the file extension of the request .