php实现比较两个字符串日期大小的方法

 
function dateBCurrent($date){
//日期是否大于当前日期
 $currentDate=date("Y-m-d");
 //获取当前日期
 $cYear=date("Y",strtotime($currentDate));
 $cMonth=date("m",strtotime($currentDate));
 $cDay=date("d",strtotime($currentDate));
 $year=date("Y",strtotime($date));
 $month=date("m",strtotime($date));
 $day=date("d",strtotime($date));
 $currentUnix=mktime(0,0,0,$cMonth,$cDay,$cYear);
 //当前日期的 Unix 时间戳
 $dateUnix=mktime(0,0,0,$month,$day,$year);
 //待比较日期的 Unix 时间戳
 if($dateUnix<=$currentUnix){
 return true;
 }else{
 return false;
 }
}