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PHP中mktime时间转换成毫秒的方法

Jun 13, 2016 am 10:14 AM
mktimephpexistReplace withmethoddatetimemillisecondofchange

在php中要把时间日期转换成时间戳(转换成毫秒)我们有很多方法,最简单的就是利用time()直接获取的是毫秒如果是如2012-05-31这样的话,有要用其它方法了。

mktime()函数对计算日期和确认日期有效性来说是非常有用的。它将自动为超过范围以外的输入计算正确的值:

 代码如下 复制代码

");
echo(date("M-d-Y",mktime(0,0,0,14,1,2001))."
");
echo(date("M-d-Y",mktime(0,0,0,1,1,2001))."
");
echo(date("M-d-Y",mktime(0,0,0,1,1,99))."
");?>

The output of the code above would be:
上述代码将输出下面的结果:

Jan-05-2002Feb-01-2002Jan-01-2001Jan-01-1999 不用多解释了吧!

 代码如下 复制代码

$now = mktime(0,0,0,date("m"),date("d"),date("Y"));
echo "now is ".date("Y/m/d", $now);

显示结果:
now is 2012/05/30
显然这不是我想要的结果。
于是,按照旧有的思维,我想当然的改造成下面这个形式:

 代码如下 复制代码

$now = mktime(date("h"),date("M"),date("s"),date("m"),date("d"),date("Y"));
echo "now is ".date("Y/M/d h:i:s", $now);

注意红色的部分,通常如果月份用m,那么分钟就应该是M。或者前者用M,后者用m。
显示结果:

Warning: mktime() expects parameter 2 to be long, string given in D:usrwebroottestPHPindex.php on line 46
now is 1970/01/01 08:Jan:00

看来主观臆断是不可取的,PHP的语法和其他的语言还是有些区别的。

不卖关子了,还是直接给大家正确的答案

 代码如下 复制代码

$now = mktime(date("h"),date("i"),date("s"),date("m"),date("d"),date("Y"));
echo "now is ".date("Y/m/d h:i:s", $now);

哈哈~是“i”而不是什么m或者M,这里给出大家这个示例只是想让PHP的初学少走一些弯路。
至于M是什么意思,大家自己做一下就明白了...嘿嘿!!!
显示结果:

 代码如下 复制代码

now is 2012/05/30 04:54:25

好了,

mktime() 函数返回一个日期的 Unix 时间戳。

参数总是表示 GMT 日期,因此 is_dst 对结果没有影响。

参数可以从右到左依次空着,空着的参数会被设为相应的当前 GMT 值。

语法

mktime(hour,minute,second,month,day,year,is_dst)

参数 描述
hour 可选。规定小时。
minute 可选。规定分钟。
second 可选。规定秒。
month 可选。规定用数字表示的月。
day 可选。规定天。
year 可选。规定年。在某些系统上,合法值介于 1901 - 2038 之间。不过在 PHP 5 中已经不存在这个限制了。
is_dst

可选。如果时间在日光节约时间(DST)期间,则设置为1,否则设置为0,若未知,则设置为-1。

自 5.1.0 起,is_dst 参数被废弃。因此应该使用新的时区处理特性。

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