How to use the date and time functions in PHP

(1) Date

Usage:

Date (format, [time]);

If there is no time argument, the current time is used.

A format is a string in which the following characters have special meaning:

U replaces the number of seconds since a start time (as if it were January 1, 1970)

Y replaces the 4-digit reign.

Y replaces the 2-digit reign.

F replaces the full name of the month in English.

M replaces the English abbreviation of the month.

M replaces the number of months.

Z replaces the number of days since January 1 of the year.

D replaces the number of own.

L REPLACE the English full name of the week.

D replaces the English abbreviation of the day of the week.

W replaces the Day of the Week (number).

H replaces the number of hours (24-hour system).

H replaces the number of hours (12-hour system).

I replace the number of minutes.

s replaces the number of seconds.

A Replace with "AM" or "PM".

A replace with "AM" or "PM".

S replaces the ordinal number suffix, for example: "St", "nd", "rd", "th".

function returns a format string that has been replaced.

(2) getdate (time)

Returns a hash table, each subscript is:

"Seconds"-number of seconds

"Minutes"--fractions

"Hours"--Number of hours

"Mday"--Number of days

"Mon"--Number of months

"Year"--the reign of the year

"Yday"--number of days since January 1

"Weekday"--day of the week, English full name

"Month"--month, full name in English

(3) Gmdate

Similar to date, but first converts time to Greenwich standard.

(4) Mktime

Usage:

Mktime (hours, fractions, seconds, months, days, years);

Returns a time value that can be used for other functions.

(5) Time

Usage:

Time ();

Returns the number of seconds since Horizon January 1, 1970.

(6) Microtime

Usage:

Microtime ();

Returns a string that is divided into two parts with a space, and the latter part equals time ()

Return value, the first part is the number of microseconds.

(7) Checkdate

Usage:

Checkdate (month, day, year);

Returns logical TRUE or logical false.

If:

[1] The year between 1900 and 32767 (including 1900 with 32767);

[2] The month between 1 to 12;

[3] The day is within the allowable number of days of the month (considering a leap year);

Returns the logic true.

(8) Set_time_limit

Usage:

Set_time_limit (number of seconds);

Specifies that the program must run at the end of a specified number of seconds from the time the sentence is run.

Timeout, the program is out of error.