original_string: public function query_vars( array $vars ){
          if( !empty($this->query_var) ){
              foreach( $this->query_var as $var ){
                  if( false === array_search($var, $vars) ){
                      $vars[] = $var;
                  }
              }
          }
          return $vars;
      }
code: public function query_vars( array $vars ){
          if( !empty($this->query_var) ){
              foreach( $this->query_var as $var ){
                  if( false === array_search($var, $vars) ){
                      $vars[] = $var;
                  }
              }
          }
          return $vars;
      }
code_tokens: public function query_vars ( array $ vars ) { if ( ! empty ( $ this -> query_var ) ) { foreach ( $ this -> query_var as $ var ) { if ( false === array_search ( $ var , $ vars ) ) { $ vars [ ] = $ var ; } } } return $ vars ; }
docstring: Add query var filter
  
  @param array $vars
  @return array
docstring_tokens: Add query var filter