PHP time and date operation practice_PHP tutorial
常见常用的时间函数:
1.time(); //取得1970/1/1 00:00:00 到现在的总秒数
2.mktime(); //设定时间
3.date(); //取得时间的详细资讯
代表字串 | 说明 | 范例 | 输出 |
---|---|---|---|
年: | |||
Y | 西元年(4位) | =date("Y")?> | 2011 |
y | 西元年(2位) | =date("y")?> | 11 |
月: | |||
m | 月份,不足二位补零(01~12) | =date("m")?> | 01 |
n | 月份,不足二位不补零(1~12) | =date("n")?> | 1 |
t | 本月共有几天(1~31) | =date("t")?> | 31 |
M | 英文月份名(缩写) | =date("M")?> | Jan |
F | 英文月份名(全名) | =date("F")?> | January |
日: | |||
d | 日期,不足二位补零(01~31) | =date("d")?> | 01 |
j | 日期,不足二位不补零(01~31) | =date("j")?> | 1 |
星期: | |||
w | 数字型的星期,(以0~6代表一到日) | =date("w")?> | 0 |
D | 星期名(缩写) | =date("D")?> | Sun |
l | 星期名(全名) | =date("l")?> | Sunday |
时: | |||
H | 24时制小时,不足二位补零(00~23) | =date("H")?> | 07 |
G | 24时制小时,不足二位不补零(0~23) | =date("G")?> | 7 |
h | 12时制小时,不足二位补零(01~12) | =date("h")?> | 07 |
g | 12时制小时,不足二位不补零(1~12) | =date("g")?> | 7 |
分: | |||
i | 分钟,不足二位补零(00~59) | =date("i")?> | 40 |
秒: | |||
s | 秒钟,不足二位补零(00~59) | =date("s")?> | 45 |
S | 秒钟,不足二位补零(00~59)加上英文顺序 | =date("S")?> | 45th |
上下午: | |||
A | 大写AM/PM | =date("A")?> | AM |
a | 小写am/pm | =date("a")?> | am |
其他: | |||
U | 1970/1/1 00:00:00 到指定天的总秒数 | =date("U")?> | 1156780800 |
z | 一年当中的第几天(0~365) | =date("z")?> | 255 |
Some common uses:
1. Get the total number of seconds from 0:00:00 on January 1, 1970 to today:
echo date("U",mktime(0,0,0 ,date("Y"),date("m"),date("d")));
?>
2. Get the total seconds from today to 7 days before and after Number:
$setTime = date("U",mktime (0,0,0,7,20,2011));
$time = date("U",mktime(0,0,0,date("m"),date("d"),date ("Y")));
$start = $time-86400*7;
$over = $time+86400*7;
if($start>=$time&&$time{
echo "The specified time is within 7 days before and after today";
}
else
{
echo "The specified time has exceeded within 7 days before and after today";
}
?>

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