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format
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The format of the outputted date string in PHP’s date() function can be specified using various characters. Here are the available options:
- d: Day of the month (01 to 31)
- D: A textual representation of a day (three letters)
- j: Day of the month without leading zeros (1 to 31)
- l (lowercase ‘L’): Full textual representation of a day
- N: ISO-8601 numeric representation of a day (1 for Monday, 7 for Sunday)
- S: English ordinal suffix for the day of the month (2 characters: st, nd, rd, or th. Works well with j)
- w: Numeric representation of the day (0 for Sunday, 6 for Saturday)
- z: Day of the year (0 through 365)
- W: ISO-8601 week number of the year (weeks starting on Monday)
- F: Full textual representation of a month (January through December)
- m: Numeric representation of a month (01 to 12)
- M: Short textual representation of a month (three letters)
- n: Numeric representation of a month, without leading zeros (1 to 12)
- t: Number of days in the given month
- L: Whether it’s a leap year (1 if it is a leap year, 0 otherwise)
- o: ISO-8601 year number
- Y: Four-digit representation of a year
- y: 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: Timezone identifier (e.g., UTC, GMT, Atlantic/Azores)
- I (capital i): Whether the date is in daylight savings time (1 if Daylight Savings Time, 0 otherwise)
- O: Difference to Greenwich time (GMT) in hours (e.g., +0100)
- P: Difference to Greenwich time (GMT) in hours
(added in PHP 5.1.3)
- T: Timezone abbreviations (e.g., EST, MDT)
- Z: Timezone offset in seconds (negative for timezones west of UTC, -43200 to 50400)
- c: ISO-8601 date (e.g., 2013-05-05T16:34:42+00:00)
- r: RFC 2822 formatted date (e.g., Fri, 12 Apr 2013 12:01:05 +0200)
- U: Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)
Additionally, the following predefined constants can be used (available since PHP 5.1.0):
- DATE_ATOM: Atom (e.g., 2013-04-12T15:52:01+00:00)
- DATE_COOKIE: HTTP Cookies (e.g., Friday, 12-Apr-13 15:52:01 UTC)
- DATE_ISO8601: ISO-8601 (e.g., 2013-04-12T15:52:01+0000)
- DATE_RFC822: RFC 822 (e.g., Fri, 12 Apr 13 15:52:01 +0000)
- DATE_RFC850: RFC 850 (e.g., Friday, 12-Apr-13 15:52:01 UTC)
- DATE_RFC1036: RFC 1036 (e.g., Fri, 12 Apr 13 15:52:01 +0000)
- DATE_RFC1123: RFC 1123 (e.g., Fri, 12 Apr 2013 15:52:01 +0000)
- DATE_RFC2822: RFC 2822 (e.g., Fri, 12 Apr 2013 15:52:01 +0000)
- DATE_RFC3339: Same as DATE_ATOM (since PHP 5.1.3)
- DATE_RSS: RSS (e.g., Fri, 12 Aug 2013 15:52:01 +0000)
- DATE_W3C: World Wide Web Consortium (e.g., 2013-04-12T15:52:01+00:00)
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