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diff --git a/user_guide_src/source/helpers/date_helper.rst b/user_guide_src/source/helpers/date_helper.rst deleted file mode 100644 index 6bc6c2b05..000000000 --- a/user_guide_src/source/helpers/date_helper.rst +++ /dev/null @@ -1,440 +0,0 @@ -########### -Date Helper -########### - -The Date Helper file contains functions that help you work with dates. - -.. contents:: - :local: - -.. raw:: html - - <div class="custom-index container"></div> - -Loading this Helper -=================== - -This helper is loaded using the following code:: - - $this->load->helper('date'); - -Available Functions -=================== - -The following functions are available: - - -.. php:function:: now([$timezone = NULL]) - - :param string $timezone: Timezone - :returns: UNIX timestamp - :rtype: int - - Returns the current time as a UNIX timestamp, referenced either to your server's - local time or any PHP supported timezone, based on the "time reference" setting - in your config file. If you do not intend to set your master time reference to - any other PHP supported timezone (which you'll typically do if you run a site - that lets each user set their own timezone settings) there is no benefit to using - this function over PHP's ``time()`` function. - :: - - echo now('Australia/Victoria'); - - If a timezone is not provided, it will return ``time()`` based on the - **time_reference** setting. - -.. php:function:: mdate([$datestr = ''[, $time = '']]) - - :param string $datestr: Date string - :param int $time: UNIX timestamp - :returns: MySQL-formatted date - :rtype: string - - This function is identical to PHP's `date() <http://php.net/manual/en/function.date.php>`_ - function, except that it lets you use MySQL style date codes, where each - code letter is preceded with a percent sign, e.g. `%Y %m %d` - - The benefit of doing dates this way is that you don't have to worry - about escaping any characters that are not date codes, as you would - normally have to do with the ``date()`` function. - - Example:: - - $datestring = 'Year: %Y Month: %m Day: %d - %h:%i %a'; - $time = time(); - echo mdate($datestring, $time); - - If a timestamp is not included in the second parameter the current time - will be used. - -.. php:function:: standard_date([$fmt = 'DATE_RFC822'[, $time = NULL]]) - - :param string $fmt: Date format - :param int $time: UNIX timestamp - :returns: Formatted date or FALSE on invalid format - :rtype: string - - Lets you generate a date string in one of several standardized formats. - - Example:: - - $format = 'DATE_RFC822'; - $time = time(); - echo standard_date($format, $time); - - .. note:: This function is DEPRECATED. Use the native ``date()`` combined with - `DateTime's format constants - <https://secure.php.net/manual/en/class.datetime.php#datetime.constants.types>`_ - instead:: - - echo date(DATE_RFC822, time()); - - **Supported formats:** - - =============== ======================= ====================================== - Constant Description Example - =============== ======================= ====================================== - DATE_ATOM Atom 2005-08-15T16:13:03+0000 - DATE_COOKIE HTTP Cookies Sun, 14 Aug 2005 16:13:03 UTC - DATE_ISO8601 ISO-8601 2005-08-14T16:13:03+00:00 - DATE_RFC822 RFC 822 Sun, 14 Aug 05 16:13:03 UTC - DATE_RFC850 RFC 850 Sunday, 14-Aug-05 16:13:03 UTC - DATE_RFC1036 RFC 1036 Sunday, 14-Aug-05 16:13:03 UTC - DATE_RFC1123 RFC 1123 Sun, 14 Aug 2005 16:13:03 UTC - DATE_RFC2822 RFC 2822 Sun, 14 Aug 2005 16:13:03 +0000 - DATE_RSS RSS Sun, 14 Aug 2005 16:13:03 UTC - DATE_W3C W3C 2005-08-14T16:13:03+0000 - =============== ======================= ====================================== - -.. php:function:: local_to_gmt([$time = '']) - - :param int $time: UNIX timestamp - :returns: UNIX timestamp - :rtype: int - - Takes a UNIX timestamp as input and returns it as GMT. - - Example:: - - $gmt = local_to_gmt(time()); - -.. php:function:: gmt_to_local([$time = ''[, $timezone = 'UTC'[, $dst = FALSE]]]) - - :param int $time: UNIX timestamp - :param string $timezone: Timezone - :param bool $dst: Whether DST is active - :returns: UNIX timestamp - :rtype: int - - Takes a UNIX timestamp (referenced to GMT) as input, and converts it to - a localized timestamp based on the timezone and Daylight Saving Time - submitted. - - Example:: - - $timestamp = 1140153693; - $timezone = 'UM8'; - $daylight_saving = TRUE; - echo gmt_to_local($timestamp, $timezone, $daylight_saving); - - - .. note:: For a list of timezones see the reference at the bottom of this page. - -.. php:function:: mysql_to_unix([$time = '']) - - :param string $time: MySQL timestamp - :returns: UNIX timestamp - :rtype: int - - Takes a MySQL Timestamp as input and returns it as a UNIX timestamp. - - Example:: - - $unix = mysql_to_unix('20061124092345'); - -.. php:function:: unix_to_human([$time = ''[, $seconds = FALSE[, $fmt = 'us']]]) - - :param int $time: UNIX timestamp - :param bool $seconds: Whether to show seconds - :param string $fmt: format (us or euro) - :returns: Formatted date - :rtype: string - - Takes a UNIX timestamp as input and returns it in a human readable - format with this prototype:: - - YYYY-MM-DD HH:MM:SS AM/PM - - This can be useful if you need to display a date in a form field for - submission. - - The time can be formatted with or without seconds, and it can be set to - European or US format. If only the timestamp is submitted it will return - the time without seconds formatted for the U.S. - - Examples:: - - $now = time(); - echo unix_to_human($now); // U.S. time, no seconds - echo unix_to_human($now, TRUE, 'us'); // U.S. time with seconds - echo unix_to_human($now, TRUE, 'eu'); // Euro time with seconds - -.. php:function:: human_to_unix([$datestr = '']) - - :param int $datestr: Date string - :returns: UNIX timestamp or FALSE on failure - :rtype: int - - The opposite of the :php:func:`unix_to_time()` function. Takes a "human" - time as input and returns it as a UNIX timestamp. This is useful if you - accept "human" formatted dates submitted via a form. Returns boolean FALSE - date string passed to it is not formatted as indicated above. - - Example:: - - $now = time(); - $human = unix_to_human($now); - $unix = human_to_unix($human); - -.. php:function:: nice_date([$bad_date = ''[, $format = FALSE]]) - - :param int $bad_date: The terribly formatted date-like string - :param string $format: Date format to return (same as PHP's ``date()`` function) - :returns: Formatted date - :rtype: string - - This function can take a number poorly-formed date formats and convert - them into something useful. It also accepts well-formed dates. - - The function will return a UNIX timestamp by default. You can, optionally, - pass a format string (the same type as the PHP ``date()`` function accepts) - as the second parameter. - - Example:: - - $bad_date = '199605'; - // Should Produce: 1996-05-01 - $better_date = nice_date($bad_date, 'Y-m-d'); - - $bad_date = '9-11-2001'; - // Should Produce: 2001-09-11 - $better_date = nice_date($bad_date, 'Y-m-d'); - - .. note:: This function is DEPRECATED. Use PHP's native `DateTime class - <https://secure.php.net/datetime>`_ instead. - -.. php:function:: timespan([$seconds = 1[, $time = ''[, $units = '']]]) - - :param int $seconds: Number of seconds - :param string $time: UNIX timestamp - :param int $units: Number of time units to display - :returns: Formatted time difference - :rtype: string - - Formats a UNIX timestamp so that is appears similar to this:: - - 1 Year, 10 Months, 2 Weeks, 5 Days, 10 Hours, 16 Minutes - - The first parameter must contain a UNIX timestamp. - The second parameter must contain a timestamp that is greater that the - first timestamp. - The thirdparameter is optional and limits the number of time units to display. - - If the second parameter empty, the current time will be used. - - The most common purpose for this function is to show how much time has - elapsed from some point in time in the past to now. - - Example:: - - $post_date = '1079621429'; - $now = time(); - $units = 2; - echo timespan($post_date, $now, $units); - - .. note:: The text generated by this function is found in the following language - file: `language/<your_lang>/date_lang.php` - -.. php:function:: days_in_month([$month = 0[, $year = '']]) - - :param int $month: a numeric month - :param int $year: a numeric year - :returns: Count of days in the specified month - :rtype: int - - Returns the number of days in a given month/year. Takes leap years into - account. - - Example:: - - echo days_in_month(06, 2005); - - If the second parameter is empty, the current year will be used. - - .. note:: This function will alias the native ``cal_days_in_month()``, if - it is available. - -.. php:function:: date_range([$unix_start = ''[, $mixed = ''[, $is_unix = TRUE[, $format = 'Y-m-d']]]]) - - :param int $unix_start: UNIX timestamp of the range start date - :param int $mixed: UNIX timestamp of the range end date or interval in days - :param bool $is_unix: set to FALSE if $mixed is not a timestamp - :param string $format: Output date format, same as in ``date()`` - :returns: An array of dates - :rtype: array - - Returns a list of dates within a specified period. - - Example:: - - $range = date_range('2012-01-01', '2012-01-15'); - echo "First 15 days of 2012:"; - foreach ($range as $date) - { - echo $date."\n"; - } - -.. php:function:: timezones([$tz = '']) - - :param string $tz: A numeric timezone - :returns: Hour difference from UTC - :rtype: int - - Takes a timezone reference (for a list of valid timezones, see the - "Timezone Reference" below) and returns the number of hours offset from - UTC. - - Example:: - - echo timezones('UM5'); - - - This function is useful when used with :php:func:`timezone_menu()`. - -.. php:function:: timezone_menu([$default = 'UTC'[, $class = ''[, $name = 'timezones'[, $attributes = '']]]]) - - :param string $default: Timezone - :param string $class: Class name - :param string $name: Menu name - :param mixed $attributes: HTML attributes - :returns: HTML drop down menu with time zones - :rtype: string - - Generates a pull-down menu of timezones, like this one: - - .. raw:: html - - <form action="#"> - <select name="timezones"> - <option value='UM12'>(UTC -12:00) Baker/Howland Island</option> - <option value='UM11'>(UTC -11:00) Samoa Time Zone, Niue</option> - <option value='UM10'>(UTC -10:00) Hawaii-Aleutian Standard Time, Cook Islands, Tahiti</option> - <option value='UM95'>(UTC -9:30) Marquesas Islands</option> - <option value='UM9'>(UTC -9:00) Alaska Standard Time, Gambier Islands</option> - <option value='UM8'>(UTC -8:00) Pacific Standard Time, Clipperton Island</option> - <option value='UM7'>(UTC -7:00) Mountain Standard Time</option> - <option value='UM6'>(UTC -6:00) Central Standard Time</option> - <option value='UM5'>(UTC -5:00) Eastern Standard Time, Western Caribbean Standard Time</option> - <option value='UM45'>(UTC -4:30) Venezuelan Standard Time</option> - <option value='UM4'>(UTC -4:00) Atlantic Standard Time, Eastern Caribbean Standard Time</option> - <option value='UM35'>(UTC -3:30) Newfoundland Standard Time</option> - <option value='UM3'>(UTC -3:00) Argentina, Brazil, French Guiana, Uruguay</option> - <option value='UM2'>(UTC -2:00) South Georgia/South Sandwich Islands</option> - <option value='UM1'>(UTC -1:00) Azores, Cape Verde Islands</option> - <option value='UTC' selected='selected'>(UTC) Greenwich Mean Time, Western European Time</option> - <option value='UP1'>(UTC +1:00) Central European Time, West Africa Time</option> - <option value='UP2'>(UTC +2:00) Central Africa Time, Eastern European Time, Kaliningrad Time</option> - <option value='UP3'>(UTC +3:00) Moscow Time, East Africa Time</option> - <option value='UP35'>(UTC +3:30) Iran Standard Time</option> - <option value='UP4'>(UTC +4:00) Azerbaijan Standard Time, Samara Time</option> - <option value='UP45'>(UTC +4:30) Afghanistan</option> - <option value='UP5'>(UTC +5:00) Pakistan Standard Time, Yekaterinburg Time</option> - <option value='UP55'>(UTC +5:30) Indian Standard Time, Sri Lanka Time</option> - <option value='UP575'>(UTC +5:45) Nepal Time</option> - <option value='UP6'>(UTC +6:00) Bangladesh Standard Time, Bhutan Time, Omsk Time</option> - <option value='UP65'>(UTC +6:30) Cocos Islands, Myanmar</option> - <option value='UP7'>(UTC +7:00) Krasnoyarsk Time, Cambodia, Laos, Thailand, Vietnam</option> - <option value='UP8'>(UTC +8:00) Australian Western Standard Time, Beijing Time, Irkutsk Time</option> - <option value='UP875'>(UTC +8:45) Australian Central Western Standard Time</option> - <option value='UP9'>(UTC +9:00) Japan Standard Time, Korea Standard Time, Yakutsk Time</option> - <option value='UP95'>(UTC +9:30) Australian Central Standard Time</option> - <option value='UP10'>(UTC +10:00) Australian Eastern Standard Time, Vladivostok Time</option> - <option value='UP105'>(UTC +10:30) Lord Howe Island</option> - <option value='UP11'>(UTC +11:00) Srednekolymsk Time, Solomon Islands, Vanuatu</option> - <option value='UP115'>(UTC +11:30) Norfolk Island</option> - <option value='UP12'>(UTC +12:00) Fiji, Gilbert Islands, Kamchatka Time, New Zealand Standard Time</option> - <option value='UP1275'>(UTC +12:45) Chatham Islands Standard Time</option> - <option value='UP13'>(UTC +13:00) Phoenix Islands Time, Tonga</option> - <option value='UP14'>(UTC +14:00) Line Islands</option> - </select> - </form> - - - This menu is useful if you run a membership site in which your users are - allowed to set their local timezone value. - - The first parameter lets you set the "selected" state of the menu. For - example, to set Pacific time as the default you will do this:: - - echo timezone_menu('UM8'); - - Please see the timezone reference below to see the values of this menu. - - The second parameter lets you set a CSS class name for the menu. - - The fourth parameter lets you set one or more attributes on the generated select tag. - - .. note:: The text contained in the menu is found in the following - language file: `language/<your_lang>/date_lang.php` - -Timezone Reference -================== - -The following table indicates each timezone and its location. - -Note some of the location lists have been abridged for clarity and formatting. - -=========== ===================================================================== -Time Zone Location -=========== ===================================================================== -UM12 (UTC - 12:00) Baker/Howland Island -UM11 (UTC - 11:00) Samoa Time Zone, Niue -UM10 (UTC - 10:00) Hawaii-Aleutian Standard Time, Cook Islands -UM95 (UTC - 09:30) Marquesas Islands -UM9 (UTC - 09:00) Alaska Standard Time, Gambier Islands -UM8 (UTC - 08:00) Pacific Standard Time, Clipperton Island -UM7 (UTC - 07:00) Mountain Standard Time -UM6 (UTC - 06:00) Central Standard Time -UM5 (UTC - 05:00) Eastern Standard Time, Western Caribbean -UM45 (UTC - 04:30) Venezuelan Standard Time -UM4 (UTC - 04:00) Atlantic Standard Time, Eastern Caribbean -UM35 (UTC - 03:30) Newfoundland Standard Time -UM3 (UTC - 03:00) Argentina, Brazil, French Guiana, Uruguay -UM2 (UTC - 02:00) South Georgia/South Sandwich Islands -UM1 (UTC -1:00) Azores, Cape Verde Islands -UTC (UTC) Greenwich Mean Time, Western European Time -UP1 (UTC +1:00) Central European Time, West Africa Time -UP2 (UTC +2:00) Central Africa Time, Eastern European Time -UP3 (UTC +3:00) Moscow Time, East Africa Time -UP35 (UTC +3:30) Iran Standard Time -UP4 (UTC +4:00) Azerbaijan Standard Time, Samara Time -UP45 (UTC +4:30) Afghanistan -UP5 (UTC +5:00) Pakistan Standard Time, Yekaterinburg Time -UP55 (UTC +5:30) Indian Standard Time, Sri Lanka Time -UP575 (UTC +5:45) Nepal Time -UP6 (UTC +6:00) Bangladesh Standard Time, Bhutan Time, Omsk Time -UP65 (UTC +6:30) Cocos Islands, Myanmar -UP7 (UTC +7:00) Krasnoyarsk Time, Cambodia, Laos, Thailand, Vietnam -UP8 (UTC +8:00) Australian Western Standard Time, Beijing Time -UP875 (UTC +8:45) Australian Central Western Standard Time -UP9 (UTC +9:00) Japan Standard Time, Korea Standard Time, Yakutsk -UP95 (UTC +9:30) Australian Central Standard Time -UP10 (UTC +10:00) Australian Eastern Standard Time, Vladivostok Time -UP105 (UTC +10:30) Lord Howe Island -UP11 (UTC +11:00) Srednekolymsk Time, Solomon Islands, Vanuatu -UP115 (UTC +11:30) Norfolk Island -UP12 (UTC +12:00) Fiji, Gilbert Islands, Kamchatka, New Zealand -UP1275 (UTC +12:45) Chatham Islands Standard Time -UP13 (UTC +13:00) Phoenix Islands Time, Tonga -UP14 (UTC +14:00) Line Islands -=========== ===================================================================== |