php判断该月有多少天
/**- * 判断某年的某月有多少天
- * @return [type] [description]
- */
- function daysInmonth($year='',$month=''){
- if(empty($year)) $year = date('Y');
- if(empty($month)) $month = date('m');
- if (in_array($month, array(1, 3, 5, 7, 8, '01', '03', '05', '07', '08', 10, 12))) {
- $text = '31'; //月大
- }elseif ($month == 2 || $month == '02'){
- if ( ($year % 400 == 0) || ( ($year % 4 == 0) && ($year % 100 !== 0) ) ) { //判断是否是闰年
- $text = '29'; //闰年2月
- } else {
- $text = '28'; //平年2月
- }
- } else {
- $text = '30'; //月小
- }
- return $text;
21.}
/**
- * 判断某年的某月有多少天
- * @return [type] [description]
- */
- function daysInmonth1($year='',$month=''){
- if(empty($year)) $year = date('Y');
- if(empty($month)) $month = date('m');
- $day = '01';
- //检测日期是否合法
- if(!checkdate($month,$day,$year)) return '输入的时间有误';
- //获取当年当月第一天的时间戳(时,分,秒,月,日,年)
- $timestamp = mktime(0,0,0,$month,$day,$year);
- $result = date('t',$timestamp);
- return $result;
16.}