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php日期所在月的第一天日期和最后一天

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2016-06-08 17:29:081128browse
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php日期所在月的第一天日期和最后一天

/**
  * 日期所在月的第一天日期
  * @return int
  */
 public function getFirstDayOfMonth ($format = 'timestamp') {
  $day = $this->getPart('yy') . '-' . $this->getPart('mm') .

'-' . '01';
  if ($format=='timestamp') {
   $day = (int)$this->toTimeStamp($day);
  }
  return $day;
 }
 /**
  * 日期所在月的最后一天日期
  * @return int
  */
 public function getLastDayOfMonth ($format = 'timestamp') {
  $day = $this->getPart('yy') . '-' . $this->getPart('mm') .

'-' . $this->daysOfMonth();
  if ($format=='timestamp') {
   $day = (int)$this->toTimeStamp($day);
  }
  return $day;
 }

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