code: public function bindParam($value, &$params)
      {
          $phName = self::PARAM_PREFIX . count($params);
          $params[$phName] = $value;
  
          return $phName;
      }
docs: Helper method to add $value to $params array using [[PARAM_PREFIX]].
  
  @param string|null $value
  @param array $params passed by reference
  @return string the placeholder name in $params array
  
  @since 2.0.14