PHP gmdate() Function
In this chapter you will learn:
- Definition for PHP gmdate() Function
- Syntax for PHP gmdate() Function
- Parameter for PHP gmdate() Function
- Format for PHP gmdate() Function
- Return value for PHP gmdate() Function
- Example - Format a GMT/UTC date and time and return the formatted date strings
Definition
The gmdate() function formats a GMT/UTC date and time, and returns the formatted date string.
Syntax
PHP gmdate() Function has the following format.
gmdate(format,timestamp);Parameter
| Parameter | Is Required | Description |
|---|---|---|
| format | Required. | Format of the outputted date string. |
| timestamp | Optional. | An integer of Unix timestamp. Default is the current local time (time()) |
Format
The following characters can be used:
- d - The day of the month (from 01 to 31)
- D - A textual representation of a day (three letters)
- j - The day of the month without leading zeros (1 to 31)
- l (lowercase 'L') - A full textual representation of a day
- N - The ISO-8601 numeric representation of a day (1 for Monday, 7 for Sunday)
- S - The English ordinal suffix for the day of the month (2 characters st, nd, rd or th. Works well with j)
- w - A numeric representation of the day (0 for Sunday, 6 for Saturday)
- z - The day of the year (from 0 through 365)
- W - The ISO-8601 week number of year (weeks starting on Monday)
- F - A full textual representation of a month (January through December)
- m - A numeric representation of a month (from 01 to 12)
- M - A short textual representation of a month (three letters)
- n - A numeric representation of a month, without leading zeros (1 to 12)
- t - The number of days in the given month
- L - Whether it's a leap year (1 if it is a leap year, 0 otherwise)
- o - The ISO-8601 year number
- Y - A four digit representation of a year
- y - A two digit representation of a year
- a - Lowercase am or pm
- A - Uppercase AM or PM
- B - Swatch Internet time (000 to 999)
- g - 12-hour format of an hour (1 to 12)
- G - 24-hour format of an hour (0 to 23)
- h - 12-hour format of an hour (01 to 12)
- H - 24-hour format of an hour (00 to 23)
- i - Minutes with leading zeros (00 to 59)
- s - Seconds, with leading zeros (00 to 59)
- u - Microseconds (added in PHP 5.2.2)
- e - The timezone identifier (Examples: UTC, GMT, Atlantic/Azores)
- I (capital i) - Whether the date is in daylights savings time (1 if Daylight Savings Time, 0 otherwise)
- O - Difference to Greenwich time (GMT) in hours (Example: +0100)
- P - Difference to Greenwich time (GMT) in hours:minutes (added in PHP 5.1.3)
- T - Timezone abbreviations (Examples: EST, MDT)
- Z - Timezone offset in seconds. The offset for timezones west of UTC is negative (-43200 to 50400)
- c - The ISO-8601 date (e.g. 2014-05-05T16:34:42+00:00)
- r - The RFC 2822 formatted date (e.g. Fri, 12 Apr 2014 12:01:05 +0200)
- U - The seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)
The following predefined constants can also be used:
- DATE_ATOM - Atom (example: 2014-04-12T15:52:01+00:00)
- DATE_COOKIE - HTTP Cookies (example: Friday, 12-Apr-13 15:52:01 UTC)
- DATE_ISO8601 - ISO-8601 (example: 2014-04-12T15:52:01+0000)
- DATE_RFC822 - RFC 822 (example: Fri, 12 Apr 13 15:52:01 +0000)
- DATE_RFC850 - RFC 850 (example: Friday, 12-Apr-13 15:52:01 UTC)
- DATE_RFC1036 - RFC 1036 (example: Fri, 12 Apr 13 15:52:01 +0000)
- DATE_RFC1123 - RFC 1123 (example: Fri, 12 Apr 2014 15:52:01 +0000)
- DATE_RFC2822 - RFC 2822 (Fri, 12 Apr 2014 15:52:01 +0000)
- DATE_RFC3339 - Same as DATE_ATOM (since PHP 5.1.3)
- DATE_RSS - RSS (Fri, 12 Aug 2014 15:52:01 +0000)
- DATE_W3C - World Wide Web Consortium (example: 2014-04-12T15:52:01+00:00)
Return
PHP gmdate() Function returns a formatted date string on success. FALSE on failure + an E_WARNING.
Example
Format a GMT/UTC date and time and return the formatted date strings:
<?php//j ava2 s. c o m
// Prints the day
echo gmdate("l") . "\n";
// Prints the day, date, month, year, time, AM or PM
echo gmdate("l jS \of F Y h:i:s A");
?>
The code above generates the following result.
Next chapter...
What you will learn in the next chapter:
- Definition for PHP gmmktime() Function
- Syntax for PHP gmmktime() Function
- Parameter for PHP gmmktime() Function
- Return value from PHP gmmktime() Function
- Note for PHP gmmktime() Function
- Example - Return the Unix timestamp for a GMT date. Then use it to find the day of that date
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