比较两个绝对时间的大小
<?php ???$zero1=date(“y-m-d h:i:s”); ???$zero2=”2010-11-29 21:07:00′; ???echo “zero1的时间为：”.$zero1.”<br>”; ???echo “zero2的时间为：”.$zero2.”<br>”; ???if(strtotime($zero1)<strtotime($zero2)){ ????echo “zero1早于zero2′; ???}else{ ????echo “zero2早于zero1′; ???} ????>倒计时小程序 实例代码
<?php ??$zero1=strtotime (date("y-m-d h:i:s")); //当前时间 ?,注意H 是24小时 h是12小时 $zero2=strtotime ("2014-1-21 00:00:00"); ?//过年时间，不能写2014-1-21 24:00:00 ?这样不对 $guonian=ceil(($zero2-$zero1)/86400); //60s*60min*24h ??echo "离过年还有<strong>$guonian</strong>天！"; ???><?php//PHP计算两个时间差的方法 $startdate="2010-12-11 11:40:00";$enddate="2012-12-12 11:45:09";$date=floor((strtotime($enddate)-strtotime($startdate))/86400);$hour=floor((strtotime($enddate)-strtotime($startdate))%86400/3600);$minute=floor((strtotime($enddate)-strtotime($startdate))%86400/60);$second=floor((strtotime($enddate)-strtotime($startdate))%86400%60);echo $date."天<br>";echo $hour."小时<br>";echo $minute."分钟<br>";echo $second."秒<br>";?>
<?php/** * 时间差计算 * * @param Timestamp $time * @return String Time Elapsed * @author Shelley Shyan * @copyright http://phparch.cn (Professional PHP Architecture) */function time2Units ($time){ ??$year ??= floor($time / 60 / 60 / 24 / 365); ??$time ?-= $year * 60 * 60 * 24 * 365; ??$month ?= floor($time / 60 / 60 / 24 / 30); ??$time ?-= $month * 60 * 60 * 24 * 30; ??$week ??= floor($time / 60 / 60 / 24 / 7); ??$time ?-= $week * 60 * 60 * 24 * 7; ??$day ???= floor($time / 60 / 60 / 24); ??$time ?-= $day * 60 * 60 * 24; ??$hour ??= floor($time / 60 / 60); ??$time ?-= $hour * 60 * 60; ??$minute = floor($time / 60); ??$time ?-= $minute * 60; ??$second = $time; ??$elapse = ‘‘; ??$unitArr = array(‘年‘ ?=>‘year‘, ‘个月‘=>‘month‘, ?‘周‘=>‘week‘, ‘天‘=>‘day‘, ???????????????????‘小时‘=>‘hour‘, ‘分钟‘=>‘minute‘, ‘秒‘=>‘second‘ ???????????????????); ??foreach ( $unitArr as $cn => $u ) ??{ ??????if ( $$u > 0 ) ??????{ ??????????$elapse = $$u . $cn; ??????????break; ??????} ??} ??return $elapse;}$past = 2052345678; // Some timestamp in the past$now ?= time(); ????// Current timestamp$diff = $now - $past;echo ‘发表于‘ . time2Units($diff) . ‘前‘;?>转：https://www.cnblogs.com/wellsoho/p/3248082.html
PHP时间比较和时间差如何计算
原文地址：http://www.cnblogs.com/fps2tao/p/8053748.html