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Homephp教程php手册分享php中显示时间的代码

一、PHP函数Date()获取当前时间 

代码:

<?php echo $showtime=date("Y-m-d H:i:s");?>

显示的格式: 年-月-日 小时:分钟:秒

相关参数: 

a:"am"或者"pm"
A:"AM"或者"PM"
d:几日,二位数字,若不足二位则前面补零,如: "01"至"31"
D:星期几,三个英文字母,如: "Fri"
F:月份,英文全名,如: "January"
h:12 小时制的小时,如: "01"至"12"
H:24 小时制的小时,如: "00"至"23"
g:12 小时制的小时,不足二位不补零,如: "1"至12"
G:24 小时制的小时,不足二位不补零,如: "0"至"23"
i:分钟,如: "00"至"59"
j:几日,二位数字,若不足二位不补零,如: "1"至"31"
l:星期几,英文全名,如:"Friday"
m:月份,二位数字,若不足二位则在前面补零;如: "01"至"12"
n:月份,二位数字,若不足二位则不补零;如:"1"至"12"
M:月份,三个英文字母;如:"Jan"
s:秒;如:"00"至"59"
S:字尾加英文序数,二个英文字母;如:"th"、"nd"
t:指定月份的天数;如:"28"至"31"
U:总秒数
w:数字型的星期几,如: "0"(星期日)至"6"(星期六)
Y:年,四位数字;如:"1999"
y:年,二位数字;如:"99"
z:一年中的第几天;如:"0"至"365"

二、PHP5中Date()函数获取时间相差8小时问题的解决方法

只需在输出时间之前加个定义:date_default_timezone_set("PRC");,代码:

<?php 
date_default_timezone_set("PRC"); 
echo date("Y-m-d H:i:s"); 
?>

三、PHP获取文件创建时间和最后修改时间的函数

filemtime(string filename):返回文件上次被修改的时间,出错时返回false。时间以Unix时间戳的方式返回,可用于Date()。

filectime(string filename):返回文件上次inode被修改的时间,如果出错则返回false。时间以Unix时间戳的方式返回。

fileatime(string filename):返回文件上次被访问的时间,如果出错则返回false。时间以Unix时间戳的方式返回。

四、PHP比较两个日期相差天数 

代码:

<?php echo (strtotime("2008-08-24 00:00:00")-strtotime("2008-08-08 00:00:00"))/86400;?>
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