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;
}