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PHP中常见的格式化显示时间日期函数

Jun 13, 2016 am 09:51 AM
date php and function Can accomplish common date time show format of

php中date函数可以实现日期与时间格式化显示了,这个也是我们常用到的一些实例,下面给各位朋友介绍介绍,希望此教程对大家有帮助。

time()函数

time() 函数返回当前时间的 Unix 时间戳。返回自从 Unix 纪元(格林威治时间 1970 年 1 月 1 日 00:00:00)到当前时间的秒数。

自 PHP 5.1 起在 $_SERVER['REQUEST_TIME'] 中保存了发起该请求时刻的时间戳。

 代码如下 复制代码

$time = time();
echo($time . "
");
echo(date("D F d Y", $time));
?>

程序运行结果:

1292984702 

Wed December 22 2010

1292984702单位是秒,从1970 年 1 月 1 日 00:00:00到现在的秒数。

有时候我们想知道下一周的今天的一些情况,比如是几号,星期几等等,我们可以这么写:

 代码如下 复制代码

$nextWeek = time() + (7 * 24 * 60 * 60); // 7 days; 24 hours; 60 mins; 60secs
echo 'Now:       '. date('Y-m-d') ."
";
echo 'Next Week: '. date('Y-m-d D', $nextWeek) ."
";
?>

程序运行结果:

Now: 2010-12-22 

Next Week: 2010-12-29 Wed

date()函数

这个函数就比较熟悉了。

 代码如下 复制代码

echo("Result with date():
");
echo(date("l") . "
");
echo(date("l dS of F Y h:i:s A") . "
");
echo("Oct 3,1975 was on a ".date("l", mktime(0,0,0,10,3,1975))."
");
echo(date(DATE_RFC822) . "
");
echo(date(DATE_ATOM,mktime(0,0,0,10,3,1975)) . "

");

echo("Result with gmdate():
");
echo(gmdate("l") . "
");
echo(gmdate("l dS of F Y h:i:s A") . "
");
echo("Oct 3,1975 was on a ".gmdate("l", mktime(0,0,0,10,3,1975))."
");
echo(gmdate(DATE_RFC822) . "
");
echo(gmdate(DATE_ATOM,mktime(0,0,0,10,3,1975)) . "
");
?>

程序运行结果:


Result with date():
Wednesday
Wednesday 22nd of December 2010 02:36:18 AM
Oct 3,1975 was on a Friday
Wed, 22 Dec 10 02:36:18 +0000
1975-10-03T00:00:00+00:00

Result with gmdate():
Wednesday
Wednesday 22nd of December 2010 02:36:18 AM
Oct 3,1975 was on a Friday
Wed, 22 Dec 10 02:36:18 +0000
1975-10-03T00:00:00+00:00

所以,我们应该给一个兼容性的写法,统一使用gmdate,并手工设置当前时区,写法改进如下:

 代码如下 复制代码

echo gmdate('Y-m-d H:i:s', time() + 3600 * 8);

这样不管在Linux+Apache下还是Windows下都得到了正确的结果,当然这样写还有一个好处,当网站是面向全世界的时候,那么网站用户只要设置所在的时区,程序自动根据用户设置的时区进行时间计算,数据库中信息发布时间只存当前的time()所生成的时间,那么在中国+8时区看到的发布时间是:2007-03-14 12:15:27,那么在欧洲+2时区用户看到这个信息的发布时间是:2007-03-14 06:15:27,这样信息的时间就全部对应正确了。

一个用于社区的自定格式显示日期

 代码如下 复制代码

/**
* 格式化显示时间函数
*
* 类似豆瓣(几秒前/几分前/今天3:50/昨天3:50/3-6)
*
* @param $timestamp 时间戳 必选参数,后面三个参数可选,为提高计算速度,建议直接赋值
* @param $now 当前时间戳
* @param $today 今天00:00时间戳
* @param $yesterday 昨天00:00时间戳
* @return string
*/
function timeshow($timestamp,$now=0,$today=0,$yesterday = 0){
if(! $timestamp){return '';}
if(! $now){$now = time();}
if(! $today){$today = strtotime("today");}
if(! $yesterday){$yesterday = $today-86400;}
$cha = $now-$timestamp;
if($cha return $cha."秒前";
}elseif($cha $min = floor($cha/60);
return $min."分钟前";
}elseif($timestamp>=$today){
return date("今天H:i",$timestamp);
}elseif($timestamp>=$yesterday){
return date("昨天H:i",$timestamp);
}else{
return date("m-d",$timestamp);
}
}

文章最后给大家介绍一些参数

格式化方式说明:
格式化方式 说明
Y 4位数字年,y为2位数字,如99即1999年
m 数字月份,前面有前导0,如01。n 为无前导0数字月份
F 月份,完整的文本格式,例如 January 或者 March
M 三个字母缩写表示的月份,例如 Jan 或者 Mar
d 月份中的第几天,前面有前导0,如03。j 为无前导0的天数
w 星期中的第几天,以数字表示,0表示星期天
z 年份中的第几天,范围0-366
W 年份中的第几周,如第32周
H 24小时格式,有前导0,h为12小时格式
G 24小时格式,无前导0,g为对应12小时格式
i 分钟格式,有前导0
s 秒格式,有前导0
A 大写上下午,如AM,a为小写

可选参数 timestamp 表示时间戳,默认为 time() ,即当前时间戳。

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