时间函数_PHP

Jun 01, 2016 pm 12:39 PM
function Replace with time usage English return

PHP中的时间函数有这么些:

(1)date

用法:

date(格式,1141064899);

如果没有时间参数,则使用当前时间. 格式是一个字符串,其中以下字符有特殊意义:

U 替换成从一个起始时间(好象是1970年1月1日)以来的秒数Y 替换成4位的年号.

y 替换成2位的年号.

F 替换成月份的英文全称.

M 替换成月份的英文简称.

m 替换成月份数.

z 替换成从当年1月1日以来的天数.

d 替换成日数.

l 替换成星期几的英文全称.

D 替换成星期几的英文简称.

w 替换成星期几(数字).

H 替换成小时数(24小时制).

h 替换成小时数(12小时制).

i 替换成分钟数.

s 替换成秒数.

A 替换成"AM"或"PM".

a 替换成"am"或"pm".

S 替换成序数字后缀,例如:"st","nd","rd","th".

函数返回作过了替换的格式串.

 

(2)getdate(时间)

返回一个哈希表,各下标是:

"seconds" -- 秒数

"minutes" -- 分数

"hours" -- 小时数

"mday" -- 日数

"mon" -- 月份数

"year" -- 年号

"yday" -- 1月1日以来的天数

"weekday" -- 星期几,英文全称

"month" -- 月份,英文全名

 

(3)gmdate

与date类似,但先将时间转换成格林威治标准时.

 

(4)mktime

用法:

mktime(小时数,分数,秒数,月,日,年); 返回一个时间值,可用于其他函数.

 

(5)time

用法:

time(); 返回1970年1月1日零点以来的秒数.

 

(6)microtime

用法:

microtime(); 返回一个字符串,用空格分成两部分,后一部分相当于time()

的返回值,前一部分是微秒数.



(7)checkdate

用法:

checkdate(月,日,年); 返回逻辑真或逻辑假. 如果:

年在1900和32767之间(包括1900与32767);
月在1到12之间;
日在该月的允许日数范围内(考虑了闰年);

则返回逻辑真.

 

(8)set_time_limit

用法:

set_time_limit(秒数);

规定从该句运行时起程序必须在指定秒数内运行结束, 超时则程序出错退出.

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