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PHP mktime() 函数

Jun 23, 2016 pm 02:34 PM

定义和用法

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)
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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。

提示和注释

注释:在 PHP 5.1 之前,如果该函数的参数非法,则会返回 false。

例子

mktime() 函数对于日期运算和验证非常有用。它可以自动校正越界的输入:

<?phpecho(date("M-d-Y",mktime(0,0,0,12,36,2001)));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)));?>
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输出:

Jan-05-2002Feb-01-2002Jan-01-2001Jan-01-1999
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