php日期操作技巧小结,php操作技巧小结
本文实例总结了php日期操作技巧。分享给大家供大家参考,具体如下:
1、php将表单里面获取的日期格式转换成统一的格式
2015-9-9 都统一转换成 2015-09-09 这样在数据库都是统一的格式,方便以后查询
$year = "2015"; $month = "9"; $day = "09"; var_dump(checkdate($month,$day, $year));//月和日带有前导0都是符合格式的 if(checkdate($month,$day, $year)===false){ exit('error'); }; $unixtime = mktime(2,2,2,$month,$day,$year);//目的是交给php转换成月和日都带有前导0的格式统一的格式存储在数据库方便以后查询 var_dump(date("Y-m-d",$unixtime)); ////交给php转换成时间戳,然后反转回来
2、获取上一天的开始时间戳和结束时间戳
本来思路是:
先用date获取当天的年月日。单独获取。得到年是2015 月是9 日是28
然后减去1就可以了。但问题出来了。
如果今天是1号呢。减去1就变成0了。上个月可能是28天,也可能是30天。
这样子,先得到上一天的时间戳。让php自动去计算。
strtotime("-1 day"); //得到上一天的时间戳,现在是几点就得到上一天这个时间点的时间戳,用这种方式好处是解决了上面问题,php会自动去计算上个月多少天
<?php header("Content-type:text/html;charset=utf-8"); date_default_timezone_set("Asia/Shanghai");//设置时区 $last_day = strtotime("-1 day");//得到上一天的时间戳,现在是几点就得到上一天这个时间点的时间戳 //通过时间戳得到年月日,以便mktime使用 $year = date("Y",$last_day); $month = date("m",$last_day); $day = date("d",$last_day); $last_day_begin = mktime(0,0,0,$month,$day,$year);//昨天的一天开始的时间戳 $last_day_end = mktime(23,59,59,$month,$day,$year); echo '昨天开始时间戳:'; var_dump($last_day_begin); echo date('Y-m-d H:i:s',$last_day_begin); echo '<br />'; echo '昨天结束时间戳:'; var_dump($last_day_end); echo date('Y-m-d H:i:s',$last_day_end); echo '<br />'; echo ($last_day_end-$last_day_begin)/(60*60);//恰好24个小时
更多关于PHP相关内容感兴趣的读者可查看本站专题:《php日期与时间用法总结》、《php面向对象程序设计入门教程》、《PHP数学运算技巧总结》、《php操作office文档技巧总结(包括word,excel,access,ppt)》、《PHP数组(Array)操作技巧大全》、《PHP数据结构与算法教程》、《php程序设计算法总结》、《php正则表达式用法总结》、及《php常见数据库操作技巧汇总》
希望本文所述对大家PHP程序设计有所帮助。

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