original_string: public function get_prev_day($daytimestamp) {
          $date = new \DateTime();
          $date->setTimestamp($daytimestamp);
          $date->modify('-1 day');
  
          return $date->getTimestamp();
      }
code: public function get_prev_day($daytimestamp) {
          $date = new \DateTime();
          $date->setTimestamp($daytimestamp);
          $date->modify('-1 day');
  
          return $date->getTimestamp();
      }
code_tokens: public function get_prev_day ( $ daytimestamp ) { $ date = new \ DateTime ( ) ; $ date -> setTimestamp ( $ daytimestamp ) ; $ date -> modify ( '-1 day' ) ; return $ date -> getTimestamp ( ) ; }
docstring: Get the previous day.
  
  @param int $daytimestamp The day timestamp.
  @return int previous day timestamp
docstring_tokens: Get the previous day .