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format
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Required. Specifies the format for the date using the following characters:
- d – Day of the month (01 to 31)
- D – Abbreviated weekday name (e.g., Mon, Tue)
- j – Day of the month without leading zeros (1 to 31)
- l (lowercase ‘L’) – Full weekday name (e.g., Monday, Tuesday)
- N – ISO-8601 numeric day representation (1 for Monday, 7 for Sunday)
- S – English ordinal suffix for the day of the month (e.g., st, nd, rd, th; works with j)
- w – Numeric day of the week (0 for Sunday, 6 for Saturday)
- z – Day of the year (0 to 365)
- W – ISO-8601 week number of the year (weeks starting on Monday)
- F – Full month name (e.g., January, February)
- m – Numeric month representation (01 to 12)
- M – Abbreviated month name (e.g., Jan, Feb)
- n – Numeric month representation without leading zeros (1 to 12)
- t – Number of days in the given month
- L – Leap year indicator (1 if leap year, 0 otherwise)
- o – ISO-8601 year number
- Y – Four-digit year representation
- y – Two-digit year representation
- a – Lowercase am/pm
- A – Uppercase AM/PM
- B – Swatch Internet time (000 to 999)
- g – 12-hour format of hour without leading zeros (1 to 12)
- G – 24-hour format of hour without leading zeros (0 to 23)
- h – 12-hour format of hour with leading zeros (01 to 12)
- H – 24-hour format of hour with leading zeros (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) – Daylight Saving Time indicator (1 if DST, 0 otherwise)
- O – Difference to GMT in hours (e.g., +0100)
- P – Difference to GMT in hours and minutes (added in PHP 5.1.3)
- T – Timezone abbreviation (e.g., EST, MDT)
- Z – Timezone offset in seconds (e.g., -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 (available since PHP 5.1.0) can be used:
- DATE_ATOM – Atom format (e.g., 2013-04-12T15:52:01+00:00)
- DATE_COOKIE – HTTP Cookies format (e.g., Friday, 12-Apr-13 15:52:01 UTC)
- DATE_ISO8601 – ISO-8601 format (e.g., 2013-04-12T15:52:01+0000)
- DATE_RFC822 – RFC 822 format (e.g., Fri, 12 Apr 13 15:52:01 +0000)
- DATE_RFC850 – RFC 850 format (e.g., Friday, 12-Apr-13 15:52:01 UTC)
- DATE_RFC1036 – RFC 1036 format (e.g., Fri, 12 Apr 13 15:52:01 +0000)
- DATE_RFC1123 – RFC 1123 format (e.g., Fri, 12 Apr 2013 15:52:01 +0000)
- DATE_RFC2822 – RFC 2822 format (e.g., Fri, 12 Apr 2013 15:52:01 +0000)
- DATE_RFC3339 – Same as DATE_ATOM (since PHP 5.1.3)
- DATE_RSS – RSS format (e.g., Fri, 12 Aug 2013 15:52:01 +0000)
- DATE_W3C – World Wide Web Consortium format (e.g., 2013-04-12T15:52:01+00:00)
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