Encoding Email in a Expression Engine Field

encode_email_ee

function filter_email_in_entry(){
		  
		  $this->EE=& get_instance();
		  $this->EE->load->library('typography');
      $this->EE->typography->initialize();
      $prefs = array(
              'text_format'   => 'xhtml',
              'html_format'   => 'all',
              'auto_links'    => 'y',
              'allow_img_url' => 'y'
      );
      
      $str = $this->EE->typography->parse_type($this->_get_param('field'), $prefs);
      return $str;
		  
		}