php 获取一个月的第一天及最后一天的方法大全

  $firstday = date('Y-m-01', strtotime('-1 month'));  $lastday = date('Y-m-t', strtotime('-1 month')); 

  $firstday = date('Y-m-01', strtotime(date("Y-m-d")));  $lastday = date('Y-m-d', strtotime("$firstday +1 month -1 day"));

  echo "当前年份：".date('Y')."年
";  echo "当前月份：".date('m')."月
";  echo "本月共有：".date("t")."天
";  echo "今日为：".date('d')."号
";

  function getdays($date)  {      $firstday = date('Y-m-01', strtotime($date));      $lastday = date('Y-m-d', strtotime("$firstday +1 month -1 day"));      return array($firstday,$lastday);  }  $today = date("Y-m-d");//获取当天作为参数  $day=getdays($today);  echo "当月的第一天: ".$day[0]."
当月的最后一天: ".$day[1];