一、函数实现
实例1：
function time_tran($the_time){ ??$now_time = date("Y-m-d H:i:s",time()+8*60*60); ??$now_time = strtotime($now_time); ??$show_time = strtotime($the_time); ??$dur = $now_time - $show_time; ??if($dur < 0){ ???return $the_time; ??}else{ ???if($dur < 60){ ????return $dur.‘秒前‘; ???}else{ ????if($dur < 3600){ ?????return floor($dur/60).‘分钟前‘; ????}else{ ?????if($dur < 86400){ ??????return floor($dur/3600).‘小时前‘; ?????}else{ ??????if($dur < 259200){//3天内 ???????return floor($dur/86400).‘天前‘; ??????}else{ ???????return $the_time; ??????} ?????} } 实例2：
<?phpfunction format_date($time){ ???$t=time()-$time; ???$f=array( ???????‘31536000‘=>‘年‘, ???????‘2592000‘=>‘个月‘, ???????‘604800‘=>‘星期‘, ???????‘86400‘=>‘天‘, ???????‘3600‘=>‘小时‘, ???????‘60‘=>‘分钟‘, ???????‘1‘=>‘秒‘ ???); ???foreach ($f as $k=>$v) ???{ ???????if (0 !=$c=floor($t/(int)$k)) { ???????????return $c.$v.‘前‘; ???????} ???}}实例3：
function formatTime($date) {$str = ‘‘;$timer = strtotime($date);$diff = $_SERVER[‘REQUEST_TIME‘] - $timer;$day = floor($diff / 86400);$free = $diff % 86400;if($day > 0) {return $day."天前";}else{if($free>0){$hour = floor($free / 3600);$free = $free % 3600;if($hour>0){return $hour."小时前";}else{if($free>0){$min = floor($free / 60);$free = $free % 60;if($min>0){return $min."分钟前";}else{if($free>0){return $free."秒前";}else{return ‘刚刚‘;}}}else{return ‘刚刚‘;}}}else{return ‘刚刚‘;}}}实例4：
function time_tran($the_time){$now_time = date("Y-m-d H:i:s",time()+8*60*60); $now_time = strtotime($now_time);$show_time = strtotime($the_time);$dur = $now_time - $show_time;if($dur < 0){return $the_time; }else{if($dur < 60){ ???return $dur.‘秒前‘; }else{ ???if($dur < 3600){ ??return floor($dur/60).‘分钟前‘; ????}else{ ??if($dur < 86400){ ??return floor($dur/3600).‘小时前‘; ???}else{ ??if($dur < 259200){//3天内 ??????return floor($dur/86400).‘天前‘; ??}else{ ??????return $the_time; ???} ??} ???}}}}php计算几分钟前、几小时前、几天前的几个函数
原文地址：https://www.cnblogs.com/ryanzheng/p/8432154.html