php 获取月份的开始结束时间

function mFristAndLast($y=0,$m=0){
    $y = $y ? $y : date('Y');
    $m = $m ? $m : date('m');
    $d = date('t', strtotime($y.'-'.$m));
    return array("firsttime"=>strtotime($y.'-'.$m),"lasttime"=>mktime(23,59,59,$m,$d,$y));
}
//获取今日开始时间戳和结束时间戳
$time1 = strtotime(date('Y-m-d 00:00:00',time()));
$time2 = strtotime(date('Y-m-d 23:59:59',time()));

//昨天时间戳
$time1 = strtotime(date('Y-m-d 00:00:00',time()-3600*24));
$time2 = strtotime(date('Y-m-d 23:59:59',time()-3600*24));

//本周时间戳
$time1 = mktime(0,0,0,date('m'),date('d')-date('N')+1,date('y'));
$time2 = mktime(23,59,59,date('m'),date('d')-date('N')+7,date('Y'));

//上周时间戳
$time1 = mktime(0,0,0,date('m'),date('d')-date('N')-6,date('Y'));
$time2 = mktime(23,59,59,date('m'),date('d')-date('N'),date('Y'));

//本月时间戳
$time1 = mktime(0,0,0,date('m'),1,date('Y'));
$time2 = mktime(23,59,59,date('m'),date('t'),date('Y'));

//上月时间戳
$time1 = strtotime(date('Y-m-01 00:00:00',strtotime('-1 month')));
$time2 = strtotime(date("Y-m-d 23:59:59", strtotime(-date('d').'day')));//去年时间戳$time1 = mktime(0,0,0,1,1,date('Y')-1);$time2 = mktime(23,59,59,12,31,date('Y')-1);

获取日期格式：

 

//获取今天时间
$time1=date('Y-m-d 00:00:00',time());
$time2=date('Y-m-d 23:59:59',time());

//获取昨天时间
$time1=date('Y-m-d 00:00:00',time()-3600*24);
$time2=date('Y-m-d 23:59:59',time()-3600*24);

//获取本周时间
$time1 = date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m"),date("d")-date("N")+1,date("Y")));
$time2 = date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("d")-date("N")+7,date("Y")));

//获取上周时间
$time1 = date('Y-m-d H:i:s', mktime(0,0,0, date('m'), date('d')-date('N')-6,date('Y')));
$time2 = date('Y-m-d H:i:s', mktime(23,59,59, date('m'), date('d')-date('N'),date('Y')));


//本月起始时间
echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m"),1,date("Y")));
echo date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("t"),date("Y")));


//上月起始时间
echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m")-1,1,date("Y")));
echo date("Y-m-d H:i:s",mktime(23,59,59,date("m") ,0,date("Y")));


//本年起始时间
echo date("Y-1-1");
echo date("Y-12-31");