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diff --git a/user_guide_src/source/helpers/date_helper.rst b/user_guide_src/source/helpers/date_helper.rst index 1a552c920..e9e122f1c 100644 --- a/user_guide_src/source/helpers/date_helper.rst +++ b/user_guide_src/source/helpers/date_helper.rst @@ -4,7 +4,12 @@ Date Helper The Date Helper file contains functions that help you work with dates. -.. contents:: Page Contents +.. contents:: + :local: + +.. raw:: html + + <div class="custom-index container"></div> Loading this Helper =================== @@ -13,281 +18,258 @@ This helper is loaded using the following code:: $this->load->helper('date'); +Available Functions +=================== + The following functions are available: -now() -===== -.. function:: now($timezone = NULL) +.. function:: now([$timezone = NULL]) :param string $timezone: Timezone :returns: int -Returns the current time as a UNIX timestamp, referenced either to your server's -local time or any PHP suported timezone, based on the "time reference" setting -in your config file. If you do not intend to set your master time reference to -any other PHP supported timezone (which you'll typically do if you run a site -that lets each user set their own timezone settings) there is no benefit to using -this function over PHP's ``time()`` function. + Returns the current time as a UNIX timestamp, referenced either to your server's + local time or any PHP suported timezone, based on the "time reference" setting + in your config file. If you do not intend to set your master time reference to + any other PHP supported timezone (which you'll typically do if you run a site + that lets each user set their own timezone settings) there is no benefit to using + this function over PHP's ``time()`` function. -:: + :: - echo now('Australia/Victoria'); + echo now('Australia/Victoria'); -If a timezone is not provided, it will return ``time()`` based on the -**time_reference** setting. + If a timezone is not provided, it will return ``time()`` based on the + **time_reference** setting. -mdate() -======= -.. function:: mdate($datestr = '', $time = '') +.. function:: mdate([$datestr = ''[, $time = '']]) :param string $datestr: Date string :param int $time: UNIX timestamp :returns: int -This function is identical to PHP's `date() <http://www.php.net/date>`_ -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` + This function is identical to PHP's `date() <http://www.php.net/date>`_ + 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. + 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:: + Example:: - $datestring = 'Year: %Y Month: %m Day: %d - %h:%i %a'; - $time = time(); - echo mdate($datestring, $time); + $datestring = 'Year: %Y Month: %m Day: %d - %h:%i %a'; + $time = time(); + echo mdate($datestring, $time); -If a timestamp is not included in the second parameter the current time -will be used. + If a timestamp is not included in the second parameter the current time + will be used. -standard_date() -=============== -.. function:: standard_date($fmt = 'DATE_RFC822', $time = NULL) +.. function:: standard_date([$fmt = 'DATE_RFC822'[, $time = NULL]]) :param string $fmt: Date format :param int $time: UNIX timestamp :returns: string -Lets you generate a date string in one of several standardized formats. + Lets you generate a date string in one of several standardized formats. -Example:: + Example:: - $format = 'DATE_RFC822'; - $time = time(); - echo standard_date($format, $time); + $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 - <http://www.php.net/manual/en/class.datetime.php#datetime.constants.types>`_ - instead: + .. note:: This function is DEPRECATED.Use the native ``date()`` combined with + `DateTime's format constants + <http://www.php.net/manual/en/class.datetime.php#datetime.constants.types>`_ + instead:: - | - | echo date(DATE_RFC822, time()); + echo date(DATE_RFC822, time()); -Supported formats ------------------ + **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 -=============== ======================= ====================================== + =============== ======================= ====================================== + 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 + =============== ======================= ====================================== -local_to_gmt() -============== -.. function:: local_to_gmt($time = '') +.. function:: local_to_gmt([$time = '']) :param int $time: UNIX timestamp :returns: string -Takes a UNIX timestamp as input and returns it as GMT. + Takes a UNIX timestamp as input and returns it as GMT. -Example:: + Example:: - $gmt = local_to_gmt(time()); + $gmt = local_to_gmt(time()); -gmt_to_local() -============== -.. function:: gmt_to_local($time = '', $timezone = 'UTC', $dst = FALSE) +.. function:: gmt_to_local([$time = ''[, $timezone = 'UTC'[, $dst = FALSE]]]) :param int $time: UNIX timestamp :param string $timezone: Timezone :param bool $dst: Whether DST is active :returns: 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. + 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:: + Example:: - $timestamp = 1140153693; - $timezone = 'UM8'; - $daylight_saving = TRUE; - echo gmt_to_local($timestamp, $timezone, $daylight_saving); + $timestamp = 1140153693; + $timezone = 'UM8'; + $daylight_saving = TRUE; + echo gmt_to_local($timestamp, $timezone, $daylight_saving); -.. note:: For a list of timezones see the reference at the bottom of this page. + .. note:: For a list of timezones see the reference at the bottom of this page. -mysql_to_unix() -=============== -.. function:: mysql_to_unix($time = '') +.. function:: mysql_to_unix([$time = '']) :param int $time: UNIX timestamp :returns: int -Takes a MySQL Timestamp as input and returns it as a UNIX timestamp. + Takes a MySQL Timestamp as input and returns it as a UNIX timestamp. -Example:: + Example:: - $unix = mysql_to_unix('20061124092345'); + $unix = mysql_to_unix('20061124092345'); -unix_to_human() -=============== -.. function:: unix_to_human($time = '', $seconds = FALSE, $fmt = 'us') +.. function:: unix_to_human([$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: integer -Takes a UNIX timestamp as input and returns it in a human readable -format with this prototype:: + 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 + 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. + 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. + 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:: + 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 + $now = time(); + echo unix_to_human($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 -human_to_unix() -=============== -.. function:: human_to_unix($datestr = '') +.. function:: human_to_unix([$datestr = '']) :param int $datestr: Date string :returns: int UNIX timestamp or FALSE on failure -The opposite of the :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. + The opposite of the :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:: + Example:: - $now = time(); - $human = unix_to_human($now); - $unix = human_to_unix($human); + $now = time(); + $human = unix_to_human($now); + $unix = human_to_unix($human); -nice_date() -=========== -.. function:: nice_date($bad_date = '', $format = FALSE) +.. function:: nice_date([$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: string -This function can take a number poorly-formed date formats and convert -them into something useful. It also accepts well-formed dates. + 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. + 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:: + Example:: - $bad_date = '199605'; - // Should Produce: 1996-05-01 - $better_date = nice_date($bad_date, 'Y-m-d'); + $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'); + $bad_date = '9-11-2001'; + // Should Produce: 2001-09-11 + $better_date = nice_date($bad_date, 'Y-m-d'); -timespan() -========== -.. function:: timespan($seconds = 1, $time = '', $units = '') +.. function:: timespan([$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: string -Formats a UNIX timestamp so that is appears similar to this:: + Formats a UNIX timestamp so that is appears similar to this:: - 1 Year, 10 Months, 2 Weeks, 5 Days, 10 Hours, 16 Minutes + 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. + 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. + 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. + 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:: + Example:: - $post_date = '1079621429'; - $now = time(); - $units = 2; - echo timespan($post_date, $now, $units); + $post_date = '1079621429'; + $now = time(); + $units = 2; + echo timespan($post_date, $now, $units); -.. note:: The text generated by this function is found in the following language - file: `language/<your_lang>/date_lang.php` + .. note:: The text generated by this function is found in the following language + file: `language/<your_lang>/date_lang.php` -days_in_month() -=============== -.. function:: days_in_month($month = 0, $year = '') +.. function:: days_in_month([$month = 0[, $year = '']]) :param int $month: a numeric month :param int $year: a numeric year :returns: int -Returns the number of days in a given month/year. Takes leap years into -account. + Returns the number of days in a given month/year. Takes leap years into + account. -Example:: + Example:: - echo days_in_month(06, 2005); + echo days_in_month(06, 2005); -If the second parameter is empty, the current year will be used. + If the second parameter is empty, the current year will be used. -date_range() -============ -.. function:: date_range($unix_start = '', $mixed = '', $is_unix = TRUE, $format = 'Y-m-d') +.. function:: date_range([$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 @@ -295,40 +277,36 @@ date_range() :param string $format: Output date format, same as in ``date()`` :returns: array -Returns a list of dates within a specified period. + Returns a list of dates within a specified period. -Example:: + Example:: - $range = date_range('2012-01-01', '2012-01-15'); - echo "First 15 days of 2012:"; - foreach ($range as $date) - { - echo $date."\n"; - } + $range = date_range('2012-01-01', '2012-01-15'); + echo "First 15 days of 2012:"; + foreach ($range as $date) + { + echo $date."\n"; + } -timezones() -=========== -.. function:: timezones($tz = '') +.. function:: timezones([$tz = '']) :param string $tz: a numeric timezone :returns: string -Takes a timezone reference (for a list of valid timezones, see the -"Timezone Reference" below) and returns the number of hours offset from -UTC. + Takes a timezone reference (for a list of valid timezones, see the + "Timezone Reference" below) and returns the number of hours offset from + UTC. -Example:: + Example:: - echo timezones('UM5'); + echo timezones('UM5'); -This function is useful when used with :func:`timezone_menu()`. + This function is useful when used with :func:`timezone_menu()`. -timezone_menu() -=============== -.. function:: timezone_menu($default = 'UTC', $class = '', $name = 'timezones', $attributes = '') +.. function:: timezone_menu([$default = 'UTC'[, $class = ''[, $name = 'timezones'[, $attributes = '']]]]) :param string $default: Timezone :param string $class: Class name @@ -336,72 +314,72 @@ timezone_menu() :param mixed $attributes: HTML attributes :returns: 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) Magadan 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` + 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) Magadan 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 |