php实现比较两个字符串日期大小的方法

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<?php

function dateBDate($date1, $date2) {

// 日期1是否大于日期2

$month1 = date("m", strtotime($date1));

$month2 = date("m", strtotime($date2));

$day1 = date("d", strtotime($date1));

$day2 = date("d", strtotime($date2));

$year1 = date("Y", strtotime($date1));

$year2 = date("Y", strtotime($date2));

$from = mktime(0, 0, 0, $month1, $day1, $year1);

$to = mktime(0, 0, 0, $month2, $day2, $year2);

if ($from > $to) {

return true;

} else {

return false;

}

}

?>

$date1 = "2009-10-13";

$date= mktime(0, 0, 0, date("m", strtotime($date1)), date("d", strtotime($date1)), date("Y", strtotime($date1)));

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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;

}

}