PHP Basic Knowledge Summary (4) Time function date

one, Time ()-- returns the current Unix time Stamp

$nextWeek = time () + (7 * 24 * 60 * 60);

Echo ' Next Week: '. Date (' y-m-d ', $nextWeek). " \ n ";

Second, mktime ( hours/ minute/ sec/ month/ day/ year)-- get a date for Unix time Stamp

echo Date ("M-d-y", mktime (0, 0, 0, 12, 32, 1997)); jan-01-1998

echo Date ("M-d-y", mktime (0, 0, 0, 13, 1, 1997)); jan-01-1998

echo Date ("M-d-y", mktime (0, 0, 0, 1, 1, 1998)); jan-01-1998

echo Date ("M-d-y", mktime (0, 0, 0, 1, 1, 98)); jan-01-1998

Third, strtotime-- resolves a datetime description of any English text to Unix time Stamp

$time =time ();

Echo Strtotime ("Now"), "\ n";

Echo Strtotime ("Ten September"), "\ n";

Echo strtotime ("+1 Day",$time), "\ n";

Echo strtotime ("+1 Week",$time), "\ n";

Echo strtotime ("+1 Week 2 days 4 hours 2 Seconds",$time), "\ n";

Echo Strtotime ("Next Thursday",$time), "\ n";

Echo Strtotime ("Last Monday",$time), "\ n";

Iv. Date-- format a local time/date

1, year

Y--4 the year of the full representation of a digit, for example: 1999

Y--2 digit number of year, for example: 99

l--is a leap year, if it is a leap year of 1, otherwise 0

2, Month

m--three-letter abbreviation for month, Jan to Dec

m--number represents the month, with leading zeros, 01 to 12

f--month, January to December

n--number represents the month, without leading zeros, 1 to 12

t--number of days for a given month, 28 to 31

3, Japan

The day ordinal of the month in d--, with a leading zero of 2 digits, 01 to 31

s--suffix, 2 characters, st,nd,rd or th, after the number of days per month.

4, Week

d--Day of the week, text representation, 3 letters, Mon to Sun

L (Lowercase letter of "L")--days of the week, Sunday to Saturday

n--Day of the week, 1 (indicated Monday) to 7 (for Sunday)

w[lowercase]--Day of the week, number indicated, 0 (indicated Sunday) to 6 (for Saturday)

5.

Day of the z--year, 0 to 366

w[the week of the capital]--year, starting from Monday, for example: 42 (42nd Week of the year)

6. Time

a--lowercase morning and afternoon values, am or PM

a--uppercase morning and afternoon values, am or PM

g--hours, 12-hour format, no leading zeros

g--hours, 24-hour format, no leading zeros

h--hours, 12-hour format, with leading zeros

h--hours, 24-hour format, with leading zeros

i--number of minutes with leading zeros

s--number of seconds with leading zeros

7. Set the default time zone

Date_default_timezone_set (' UTC ');

Suppose today is: 2001.3.10, 5:16:18 pm

$today = Date ("F J, Y, g:i a"); March, 2001, 5:16 PM

$today = Date ("M.d.y"); 03.10.01

$today = Date ("J, N, Y"); 10, 3, 2001

$today = Date ("Ymd"); 20010310

$today = Date (' H-i-s, J-m-y, it's W day Z '); 05-16-17, 10-03-01, 1631 1618 6 Fripm01

$today = Date (' \i\t \i\s \t\h\e jS \d\a\y. '); It's the 10th day.

$today = Date ("D M J g:i:s T Y"); Sat Mar 15:16:08 MST 2001

$today = Date (' h:m:s \m \i\s\ \m\o\n\t\h '); 17:03:17 M is month

$today = Date ("H:i:s"); 17:16:17

Wu, getdate-- Get Date/time information

$today = getdate ();

Print_r ($today);

Array (

[Seconds] = 40

[Minutes] = 58

[Hours] = 21

[Mday] + 17//The number of days in the month indicated

[Wday] = 2//The number of days of the week represents 0 (for Sunday) to 6 (for Saturday)

[Mon] = 6/month number indication

[Year] = 2003

[Yday] = 167//The number of days of the year indicates

[Weekday] = Tuesday

[Month] = June

[0] = 1055901520

)

Gettimeofday--Get current time

Print_r (Gettimeofday ());

Array (

[sec] + 1073504408//number of seconds since the Unix era

[USEC] = 238215//microseconds

[Minuteswest] = 0//Greenwich Westward minutes

[Dsttime] + 1//Daylight saving time correction type

)

Echo Gettimeofday (TRUE);//1073504408.23910 returns a floating-point number when it is set to true.

Six, localtime-- Get local time

$localtime _assoc = localtime (Time (), true), or//If True, the index is represented by a number

Print_r ($localtime _ASSOC);

Array (

[Tm_sec] = 24//sec

[Tm_min] = 3//minutes

[Tm_hour] = 19/per hour

[Tm_mday] = 3//day of the month

[Tm_mon] = month of 3//year, starting from 0 for a month

[Tm_year] = 105//year, starting from 1900

[Tm_wday] = 0//day of the Week, from 0 (Sunday) to 6 (Saturday)

[Tm_yday] = 92//day of the year

[TM_ISDST] = 1//Daylight saving time is currently in effect

)