Detailed explanation of PHP's date and time function date()_PHP tutorial

PHP date and time function date()

1, year-month-day

echo date('Y-m-j');

2007-02-6

echo date('y-n-j');

07-2-6

Capital Y represents the four-digit year, while lowercase y represents the two-digit year;

A lowercase m represents the number of the month (with a leading character), while a lowercase n represents the number of the month without a leading character.

echo date('Y-M-j');

2007-Feb-6

echo date('Y-m-d');

2007-02-06

Capital M represents the 3 abbreviated characters of the month, while lowercase m represents the number of the month (with leading 0);

There is no capital J, only lowercase j represents the date of the month, without the leading o; if the month needs to be preceded, use the lowercase d.

echo date('Y-M-j');

2007-Feb-6

echo date('Y-F-jS');

2007-February-6th

Capital M represents the 3 abbreviated characters of the month, while capital F represents the full English version of the month. (no lowercase f)

Capital S represents the suffix of the date, such as "st", "nd", "rd" and "th", depending on the date number.

Summary:

You can use uppercase Y or lowercase y to indicate the year;

The month can be represented by uppercase F, uppercase M, lowercase m and lowercase n (two ways to represent characters and numbers respectively);

can use lowercase d and lowercase j to represent the day, and uppercase S represents the suffix of the date.

2, hours: minutes: seconds

By default, the time displayed by PHP interpretation is "Greenwich Mean Time", which is 8 hours different from our local time.

echo date('g:i:s a');

5:56:57 am

echo date('h:i:s A');

05:56:57 AM

A lowercase g indicates a 12-hour format without leading 0s, while a lowercase h indicates a 12-hour format with leading 0s.

When using the 12-hour clock, you need to indicate morning and afternoon. Lowercase a represents lowercase "am" and "pm", and uppercase A represents uppercase "AM" and "PM".

echo date('G:i:s');

14:02:26

Capital G represents the hour in 24-hour format, but without leading; use capital H to represent the hour in 24-hour format with leading

Summary:

The letter g represents the hour without leading, and the letter h represents the hour with leading;

Lowercase g and h represent the 12-hour clock, and uppercase G and H represent the 24-hour clock.

3, leap year, week, day

echo date('L');

Whether this year is a leap year: 0

echo date('l');

Today is: Tuesday

echo date('D');

Today is: Tue

Capital L indicates whether this year is a leap year, Boolean value, returns 1 if true, otherwise 0;

The lowercase l represents the full English word for the day of the week (Tuesday);

Use a capital D to represent the 3-character abbreviation of the day of the week (Tue).

echo date('w');

Today’s week: 2

echo date('W');

This week is week 06 of the year

The lowercase w represents the day of the week, and the number represents it

Capital W represents the number of weeks in the year

echo date('t');

This month is 28 days

echo date('z');

Today is the 36th day of the year

Lowercase t represents the number of days in the current month

Lowercase z indicates the day of the year today is

4, other

echo date('T');

UTC

Capital T indicates the server’s time locale

echo date('I');

0

Capital I means to determine whether the current daylight saving time is, if true, return 1, otherwise 0

echo date('U');

1170769424

Capital U represents the total number of seconds from January 1, 1970 to the present, which is the UNIX timestamp of the Unix time epoch.

echo date('c');

2007-02-06T14:24:43+00:00

Lowercase c represents the ISO8601 date. The date format is YYYY-MM-DD. The letter T is used to separate the date and time. The time format is HH:MM:SS. The time zone is represented by the offset from Greenwich Mean Time (GMT). .

echo date('r');

Tue, 06 Feb 2007 14:25:52 +0000

Lowercase r indicates RFC822 date.

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