PHP Learning _php Tutorials on time

About the function of time:

Strftime formatting local time/date based on regional settings

strptime-parsing date/time generated by strftime ()

setlocale function Setting Region information (Geographic information)

Date_default_timezone_set if the date function is found to be 8 hours apart from the actual number of hours, please add date_default_timezone_set (' etc/gmt-8 ');

date-formatting a local time/date

Gmdate is exactly the same as date-formatting a GMT/UTC date/time

mktime-get a date for Unix timestamp mktime (0, 0, 0, 12, 30, 1997)

Gmmktime and Mktime are exactly the same.

strtotime-to parse the datetime description of any English text into a UNIX timestamp

time-returns the current UNIX timestamp

microtime-returns the current UNIX timestamp and number of microseconds

Getlastmod-get the last time the page content was updated in the current use

Note: Timestamp is not a function that refers to the number of seconds that a Unix timestamp is from January 01, 1970 0:0 0 seconds to a moment

Actual Operation case

$strtime = "2000-02-12 16:20:35";

$array = Explode ("-", $strtime);

$year = $array [0];

$month = $array [1];

Var_dump ($array);

$array = Explode (":", $array [2]);

$minute = $array [1];

$second = $array [2];

Var_dump ($array);

$array = Explode ("", $array [0]);

$day = $array [0];

$hour = $array [1];

$timestamp = Mktime ($hour, $minute, $second, $month, $day, $year);

echo "String time: $strtime
";

echo "Year: $year
";

echo "Month: $month
";

echo "Day: $day
";

echo "When: $hour
";

echo "Score: $minute
";

echo "Seconds: $second
";

echo "converted to timestamp:". $timestamp. "
";

echo "converted from timestamp back:". Date ("Y-m-d h:i:s", $timestamp). "
";

echo "converted from timestamp back:". Date ("Y-m-d h:i:s", "1288263141"). "
";

Header ("content-type:text/html; Charset=utf-8 ");

Echo (Strtotime ("2010-10-28 10:52:21")). "
"; MySQL format string converted to seconds

Echo (Strtotime ("2010-10-01 00:00:00")). "
";

$d = Date ("Y-m-d h:i:s", Time ()); Seconds converted to timestamp in MySQL format

echo $d. "
";

The result is:

Array

0 = String ' a ' (length=4)

1 = String ' in ' (length=2)

2 = String ' 16:20:35 ' (length=11)

Array

0 = String ' (length=5)

1 = String ' (length=2)

2 = String ' (length=2)

String time: 2000-02-12 16:20:35

Year: 2000

Month: 02

Day: 12

Hours: 16

Points: 20

Seconds: 35

Convert to timestamp:950372435

Convert from timestamp back: 00-02-12 04:20:35

Convert from timestamp back: 10-10-28 10:52:21

1288263141

1285891200

2011-10-20 14:48:27

Common values for formatting time functions

The function date (string format [, int timestamp]) can format the date/time, the parameter format is the formatted string, and the most common values are as follows:

Year of the full representation of y:4 digits

Y:2 number of years represented by a digit

M: The month represented by numbers

M: three-letter abbreviation for month

D: The day ordinal of the month

D: The day of the week

H: Hour, 12-hour format, with leading zeros

H: Hour, 24-hour format, with leading zeros

I: Number of minutes with leading zeros

I: is daylight saving time

S: Number of seconds

S: English suffix after the number of days of the month, 2 characters

W: The day of the week, the number indicates

Week of the w:iso-8601 format year, starting from Monday

L: Day of the week, full text format

L: Whether it is a leap year

G:12 hour format with no leading zeros

G: 24-hour format with no leading zeros

If you find that the number of hours from the date function differs from the actual 8 hours, add date_default_timezone_set (' etc/gmt-8 ');

The GETDATE (timestamp) function can obtain date/time information.

Returns a associative array that contains date information, based on timestamp. If the timestamp is not given, it is considered the current local time.

The cells in the array are as follows:

Key Name

Description

Example of return value

"Seconds"

The number of seconds is expressed

0 to 59

"Minutes"

The number of minutes indicates

0 to 59

"Hours"

The number of hours indicates

0 to 23

"Mday"

The number of days in the month indicates

1 to 31

"Wday"

The number of days of the week indicates

0 (for Sunday) to 6 (= Saturday)

"Mon"

Numeric representation of the month

1 to 12

"Year"

Full Year 4-digit representation

Example: 1999 or 2003

"Yday"

The number of days in a year indicates

0 to 365

"Weekday"

Full text representation of the day of the week

Sunday to Saturday

"Month"

Full text representation of the month

January to December

0

The number of seconds since the Unix era began, similar to the return value of time () and the value used for date ().

System-dependent, typical values are from 2147483648 to 2147483647.

Instance:

Format displayed: Year-month-day hour: minute: Wonderful

$showtime =date ("y-m-d h:i:s");

Echo ' shows the time in the format: '. $showtime. '
";

The result is:

The format of the display time is: 2011-10-20 14:48:27

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