Date and Time Functions
介紹
These functions allow you to get the date and time from the server where your PHP scripts are running. You can use these functions to format the date and time in many different ways.
Note: Please keep in mind that these functions are dependent on the locale settings of your server. Make sure to take daylight saving time (use e.g. $date = strtotime('+7 days', $date) and not $date += 7*24*60*60) and leap years into consideration when working with these functions.
Note: The timezones referenced in this section can be found in the List of Supported Timezones.
需求
建立這個延伸不需要任何外部程式庫。
安裝
這些函數是PHP核心的一部分，不需要安裝就可使用。
Note: The latest version of the timezone database can be installed via PECL's » timezonedb. For Windows users, a pre-compiled DLL can be downloaded from the PECL4Win site: » php_timezonedb.dll.
執行時期組態
php.ini中的設定會影響這些函數的行為。
| Name | Default | Changeable | Changelog |
|---|---|---|---|
| date.default_latitude | "31.7667" | PHP_INI_ALL | Available since PHP 5.0.0. |
| date.default_longitude | "35.2333" | PHP_INI_ALL | Available since PHP 5.0.0. |
| date.sunrise_zenith | "90.583333" | PHP_INI_ALL | Available since PHP 5.0.0. |
| date.sunset_zenith | "90.583333" | PHP_INI_ALL | Available since PHP 5.0.0. |
| date.timezone | "" | PHP_INI_ALL | Available since PHP 5.1.0. |
這裡為簡短的結構指令說明。
- date.default_latitude float
-
The default latitude.
- date.default_longitude float
-
The default longitude.
- date.sunrise_zenith float
-
The default sunrise zenith.
- date.sunset_zenith float
-
The default sunset zenith.
- date.timezone string
-
The default timezone used by all date/time functions if the TZ environment variable isn't set. The precedence order is described in the date_default_timezone_get() page. See List of Supported Timezones for a list of supported timezones.
Note: The first four configuration options are currently only used by date_sunrise() and date_sunset().
資源類型
這個延伸沒有定義任何資源。
預先定義常數
The following constants are defined since PHP 5.1.1 and they offer standard date representations, which can be used along with the date format functions (like date()).
- DATE_ATOM (string)
- Atom (example: 2005-08-15T15:52:01+00:00)
- DATE_COOKIE (string)
- HTTP Cookies (example: Monday, 15-Aug-05 15:52:01 UTC)
- DATE_ISO8601 (string)
- ISO-8601 (example: 2005-08-15T15:52:01+0000)
- DATE_RFC822 (string)
- RFC 822 (example: Mon, 15 Aug 05 15:52:01 +0000)
- DATE_RFC850 (string)
- RFC 850 (example: Monday, 15-Aug-05 15:52:01 UTC)
- DATE_RFC1036 (string)
- RFC 1036 (example: Mon, 15 Aug 05 15:52:01 +0000)
- DATE_RFC1123 (string)
- RFC 1123 (example: Mon, 15 Aug 2005 15:52:01 +0000)
- DATE_RFC2822 (string)
- RFC 2822 (Mon, 15 Aug 2005 15:52:01 +0000)
- DATE_RFC3339 (string)
- Same as DATE_ATOM (since PHP 5.1.3)
- DATE_RSS (string)
- RSS (Mon, 15 Aug 2005 15:52:01 +0000)
- DATE_W3C (string)
- World Wide Web Consortium (example: 2005-08-15T15:52:01+00:00)
Following constants exists since PHP 5.1.2 and specify a format returned by functions date_sunrise() and date_sunset().
Table of Contents
- checkdate — Validate a Gregorian date
- date_create — Returns new DateTime object
- date_date_set — Sets the date
- date_default_timezone_get — Gets the default timezone used by all date/time functions in a script
- date_default_timezone_set — Sets the default timezone used by all date/time functions in a script
- date_format — Returns date formatted according to given format
- date_isodate_set — Sets the ISO date
- date_modify — Alters the timestamp
- date_offset_get — Returns the daylight saving time offset
- date_parse — Returns associative array with detailed info about given date
- date_sun_info — Returns an array with information about sunset/sunrise and twilight begin/end
- date_sunrise — Returns time of sunrise for a given day and location
- date_sunset — Returns time of sunset for a given day and location
- date_time_set — Sets the time
- date_timezone_get — Return time zone relative to given DateTime
- date_timezone_set — Sets the time zone for the DateTime object
- date — Format a local time/date
- getdate — Get date/time information
- gettimeofday — Get current time
- gmdate — Format a GMT/UTC date/time
- gmmktime — Get Unix timestamp for a GMT date
- gmstrftime — Format a GMT/UTC time/date according to locale settings
- idate — Format a local time/date as integer
- localtime — Get the local time
- microtime — Return current Unix timestamp with microseconds
- mktime — Get Unix timestamp for a date
- strftime — Format a local time/date according to locale settings
- strptime — Parse a time/date generated with strftime
- strtotime — Parse about any English textual datetime description into a Unix timestamp
- time — Return current Unix timestamp
- timezone_abbreviations_list — Returns associative array containing dst, offset and the timezone name
- timezone_identifiers_list — Returns numerically index array with all timezone identifiers
- timezone_name_from_abbr — Returns the timezone name from abbrevation
- timezone_name_get — Returns the name of the timezone
- timezone_offset_get — Returns the timezone offset from GMT
- timezone_open — Returns new DateTimeZone object
- timezone_transitions_get — Returns all transitions for the timezone