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<?php
/**
* CodeIgniter
*
* An open source application development framework for PHP
*
* This content is released under the MIT License (MIT)
*
* Copyright (c) 2014 - 2019, British Columbia Institute of Technology
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @package CodeIgniter
* @author EllisLab Dev Team
* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
* @license https://opensource.org/licenses/MIT MIT License
* @link https://codeigniter.com
* @since Version 1.0.0
* @filesource
*/
defined('BASEPATH') OR exit('No direct script access allowed');
/**
* CodeIgniter Date Helpers
*
* @package CodeIgniter
* @subpackage Helpers
* @category Helpers
* @author EllisLab Dev Team
* @link https://codeigniter.com/user_guide/helpers/date_helper.html
*/
// ------------------------------------------------------------------------
if ( ! function_exists('now'))
{
/**
* Get "now" time
*
* Returns time() based on the timezone parameter or on the
* "time_reference" setting
*
* @param string
* @return int
*/
function now($timezone = NULL)
{
if (empty($timezone))
{
$timezone = config_item('time_reference');
}
if ($timezone === 'local' OR $timezone === date_default_timezone_get())
{
return time();
}
$datetime = new DateTime('now', new DateTimeZone($timezone));
sscanf($datetime->format('j-n-Y G:i:s'), '%d-%d-%d %d:%d:%d', $day, $month, $year, $hour, $minute, $second);
return mktime($hour, $minute, $second, $month, $day, $year);
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('mdate'))
{
/**
* Convert MySQL Style Datecodes
*
* This function is identical to PHPs date() function,
* except that it allows date codes to be formatted using
* the MySQL style, where each code letter is preceded
* with a percent sign: %Y %m %d etc...
*
* The benefit of doing dates this way is that you don't
* have to worry about escaping your text letters that
* match the date codes.
*
* @param string
* @param int
* @return int
*/
function mdate($datestr = '', $time = '')
{
if ($datestr === '')
{
return '';
}
elseif (empty($time))
{
$time = now();
}
$datestr = str_replace(
'%\\',
'',
preg_replace('/([a-z]+?){1}/i', '\\\\\\1', $datestr)
);
return date($datestr, $time);
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('standard_date'))
{
/**
* Standard Date
*
* Returns a date formatted according to the submitted standard.
*
* As of PHP 5.2, the DateTime extension provides constants that
* serve for the exact same purpose and are used with date().
*
* @todo Remove in version 3.1+.
* @deprecated 3.0.0 Use PHP's native date() instead.
* @link http://www.php.net/manual/en/class.datetime.php#datetime.constants.types
*
* @example date(DATE_RFC822, now()); // default
* @example date(DATE_W3C, $time); // a different format and time
*
* @param string $fmt = 'DATE_RFC822' the chosen format
* @param int $time = NULL Unix timestamp
* @return string
*/
function standard_date($fmt = 'DATE_RFC822', $time = NULL)
{
if (empty($time))
{
$time = now();
}
// Procedural style pre-defined constants from the DateTime extension
if (strpos($fmt, 'DATE_') !== 0 OR defined($fmt) === FALSE)
{
return FALSE;
}
return date(constant($fmt), $time);
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('timespan'))
{
/**
* Timespan
*
* Returns a span of seconds in this format:
* 10 days 14 hours 36 minutes 47 seconds
*
* @param int a number of seconds
* @param int Unix timestamp
* @param int a number of display units
* @return string
*/
function timespan($seconds = 1, $time = '', $units = 7)
{
$CI =& get_instance();
$CI->lang->load('date');
is_numeric($seconds) OR $seconds = 1;
is_numeric($time) OR $time = time();
is_numeric($units) OR $units = 7;
$seconds = ($time <= $seconds) ? 1 : $time - $seconds;
$str = array();
$years = floor($seconds / 31557600);
if ($years > 0)
{
$str[] = $years.' '.$CI->lang->line($years > 1 ? 'date_years' : 'date_year');
}
$seconds -= $years * 31557600;
$months = floor($seconds / 2629743);
if (count($str) < $units && ($years > 0 OR $months > 0))
{
if ($months > 0)
{
$str[] = $months.' '.$CI->lang->line($months > 1 ? 'date_months' : 'date_month');
}
$seconds -= $months * 2629743;
}
$weeks = floor($seconds / 604800);
if (count($str) < $units && ($years > 0 OR $months > 0 OR $weeks > 0))
{
if ($weeks > 0)
{
$str[] = $weeks.' '.$CI->lang->line($weeks > 1 ? 'date_weeks' : 'date_week');
}
$seconds -= $weeks * 604800;
}
$days = floor($seconds / 86400);
if (count($str) < $units && ($months > 0 OR $weeks > 0 OR $days > 0))
{
if ($days > 0)
{
$str[] = $days.' '.$CI->lang->line($days > 1 ? 'date_days' : 'date_day');
}
$seconds -= $days * 86400;
}
$hours = floor($seconds / 3600);
if (count($str) < $units && ($days > 0 OR $hours > 0))
{
if ($hours > 0)
{
$str[] = $hours.' '.$CI->lang->line($hours > 1 ? 'date_hours' : 'date_hour');
}
$seconds -= $hours * 3600;
}
$minutes = floor($seconds / 60);
if (count($str) < $units && ($days > 0 OR $hours > 0 OR $minutes > 0))
{
if ($minutes > 0)
{
$str[] = $minutes.' '.$CI->lang->line($minutes > 1 ? 'date_minutes' : 'date_minute');
}
$seconds -= $minutes * 60;
}
if (count($str) === 0)
{
$str[] = $seconds.' '.$CI->lang->line($seconds > 1 ? 'date_seconds' : 'date_second');
}
return implode(', ', $str);
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('days_in_month'))
{
/**
* Number of days in a month
*
* Takes a month/year as input and returns the number of days
* for the given month/year. Takes leap years into consideration.
*
* @param int a numeric month
* @param int a numeric year
* @return int
*/
function days_in_month($month = 0, $year = '')
{
if ($month < 1 OR $month > 12)
{
return 0;
}
elseif ( ! is_numeric($year) OR strlen($year) !== 4)
{
$year = date('Y');
}
if (defined('CAL_GREGORIAN'))
{
return cal_days_in_month(CAL_GREGORIAN, $month, $year);
}
if ($year >= 1970)
{
return (int) date('t', mktime(12, 0, 0, $month, 1, $year));
}
if ($month == 2)
{
if ($year % 400 === 0 OR ($year % 4 === 0 && $year % 100 !== 0))
{
return 29;
}
}
$days_in_month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
return $days_in_month[$month - 1];
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('local_to_gmt'))
{
/**
* Converts a local Unix timestamp to GMT
*
* @param int Unix timestamp
* @return int
*/
function local_to_gmt($time = '')
{
if ($time === '')
{
$time = time();
}
return mktime(
gmdate('G', $time),
gmdate('i', $time),
gmdate('s', $time),
gmdate('n', $time),
gmdate('j', $time),
gmdate('Y', $time)
);
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('gmt_to_local'))
{
/**
* Converts GMT time to a localized value
*
* Takes a Unix timestamp (in GMT) as input, and returns
* at the local value based on the timezone and DST setting
* submitted
*
* @param int Unix timestamp
* @param string timezone
* @param bool whether DST is active
* @return int
*/
function gmt_to_local($time = '', $timezone = 'UTC', $dst = FALSE)
{
if ($time === '')
{
return now();
}
$time += timezones($timezone) * 3600;
return ($dst === TRUE) ? $time + 3600 : $time;
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('mysql_to_unix'))
{
/**
* Converts a MySQL Timestamp to Unix
*
* @param int MySQL timestamp YYYY-MM-DD HH:MM:SS
* @return int Unix timstamp
*/
function mysql_to_unix($time = '')
{
// We'll remove certain characters for backward compatibility
// since the formatting changed with MySQL 4.1
// YYYY-MM-DD HH:MM:SS
$time = str_replace(array('-', ':', ' '), '', $time);
// YYYYMMDDHHMMSS
return mktime(
substr($time, 8, 2),
substr($time, 10, 2),
substr($time, 12, 2),
substr($time, 4, 2),
substr($time, 6, 2),
substr($time, 0, 4)
);
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('unix_to_human'))
{
/**
* Unix to "Human"
*
* Formats Unix timestamp to the following prototype: 2006-08-21 11:35 PM
*
* @param int Unix timestamp
* @param bool whether to show seconds
* @param string format: us or euro
* @return string
*/
function unix_to_human($time = '', $seconds = FALSE, $fmt = 'us')
{
$r = date('Y', $time).'-'.date('m', $time).'-'.date('d', $time).' ';
if ($fmt === 'us')
{
$r .= date('h', $time).':'.date('i', $time);
}
else
{
$r .= date('H', $time).':'.date('i', $time);
}
if ($seconds)
{
$r .= ':'.date('s', $time);
}
if ($fmt === 'us')
{
return $r.' '.date('A', $time);
}
return $r;
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('human_to_unix'))
{
/**
* Convert "human" date to GMT
*
* Reverses the above process
*
* @param string format: us or euro
* @return int
*/
function human_to_unix($datestr = '')
{
if ($datestr === '')
{
return FALSE;
}
$datestr = preg_replace('/\040+/', ' ', trim($datestr));
if ( ! preg_match('/^(\d{2}|\d{4})\-[0-9]{1,2}\-[0-9]{1,2}\s[0-9]{1,2}:[0-9]{1,2}(?::[0-9]{1,2})?(?:\s[AP]M)?$/i', $datestr))
{
return FALSE;
}
sscanf($datestr, '%d-%d-%d %s %s', $year, $month, $day, $time, $ampm);
sscanf($time, '%d:%d:%d', $hour, $min, $sec);
isset($sec) OR $sec = 0;
if (isset($ampm))
{
$ampm = strtolower($ampm);
if ($ampm[0] === 'p' && $hour < 12)
{
$hour += 12;
}
elseif ($ampm[0] === 'a' && $hour === 12)
{
$hour = 0;
}
}
return mktime($hour, $min, $sec, $month, $day, $year);
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('nice_date'))
{
/**
* Turns many "reasonably-date-like" strings into something
* that is actually useful. This only works for dates after unix epoch.
*
* @deprecated 3.1.3 Use DateTime::createFromFormat($input_format, $input)->format($output_format);
* @param string The terribly formatted date-like string
* @param string Date format to return (same as php date function)
* @return string
*/
function nice_date($bad_date = '', $format = FALSE)
{
if (empty($bad_date))
{
return 'Unknown';
}
elseif (empty($format))
{
$format = 'U';
}
// Date like: YYYYMM
if (preg_match('/^\d{6}$/i', $bad_date))
{
if (in_array(substr($bad_date, 0, 2), array('19', '20')))
{
$year = substr($bad_date, 0, 4);
$month = substr($bad_date, 4, 2);
}
else
{
$month = substr($bad_date, 0, 2);
$year = substr($bad_date, 2, 4);
}
return date($format, strtotime($year.'-'.$month.'-01'));
}
// Date Like: YYYYMMDD
if (preg_match('/^\d{8}$/i', $bad_date, $matches))
{
return DateTime::createFromFormat('Ymd', $bad_date)->format($format);
}
// Date Like: MM-DD-YYYY __or__ M-D-YYYY (or anything in between)
if (preg_match('/^(\d{1,2})-(\d{1,2})-(\d{4})$/i', $bad_date, $matches))
{
return date($format, strtotime($matches[3].'-'.$matches[1].'-'.$matches[2]));
}
// Any other kind of string, when converted into UNIX time,
// produces "0 seconds after epoc..." is probably bad...
// return "Invalid Date".
if (date('U', strtotime($bad_date)) === '0')
{
return 'Invalid Date';
}
// It's probably a valid-ish date format already
return date($format, strtotime($bad_date));
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('timezone_menu'))
{
/**
* Timezone Menu
*
* Generates a drop-down menu of timezones.
*
* @param string timezone
* @param string classname
* @param string menu name
* @param mixed attributes
* @return string
*/
function timezone_menu($default = 'UTC', $class = '', $name = 'timezones', $attributes = '')
{
$CI =& get_instance();
$CI->lang->load('date');
$default = ($default === 'GMT') ? 'UTC' : $default;
$menu = '<select name="'.$name.'"';
if ($class !== '')
{
$menu .= ' class="'.$class.'"';
}
$menu .= _stringify_attributes($attributes).">\n";
foreach (timezones() as $key => $val)
{
$selected = ($default === $key) ? ' selected="selected"' : '';
$menu .= '<option value="'.$key.'"'.$selected.'>'.$CI->lang->line($key)."</option>\n";
}
return $menu.'</select>';
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('timezones'))
{
/**
* Timezones
*
* Returns an array of timezones. This is a helper function
* for various other ones in this library
*
* @param string timezone
* @return string
*/
function timezones($tz = '')
{
// Note: Don't change the order of these even though
// some items appear to be in the wrong order
$zones = array(
'UM12' => -12,
'UM11' => -11,
'UM10' => -10,
'UM95' => -9.5,
'UM9' => -9,
'UM8' => -8,
'UM7' => -7,
'UM6' => -6,
'UM5' => -5,
'UM45' => -4.5,
'UM4' => -4,
'UM35' => -3.5,
'UM3' => -3,
'UM2' => -2,
'UM1' => -1,
'UTC' => 0,
'UP1' => +1,
'UP2' => +2,
'UP3' => +3,
'UP35' => +3.5,
'UP4' => +4,
'UP45' => +4.5,
'UP5' => +5,
'UP55' => +5.5,
'UP575' => +5.75,
'UP6' => +6,
'UP65' => +6.5,
'UP7' => +7,
'UP8' => +8,
'UP875' => +8.75,
'UP9' => +9,
'UP95' => +9.5,
'UP10' => +10,
'UP105' => +10.5,
'UP11' => +11,
'UP115' => +11.5,
'UP12' => +12,
'UP1275' => +12.75,
'UP13' => +13,
'UP14' => +14
);
if ($tz === '')
{
return $zones;
}
return isset($zones[$tz]) ? $zones[$tz] : 0;
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('date_range'))
{
/**
* Date range
*
* Returns a list of dates within a specified period.
*
* @param int unix_start UNIX timestamp of period start date
* @param int unix_end|days UNIX timestamp of period end date
* or interval in days.
* @param mixed is_unix Specifies whether the second parameter
* is a UNIX timestamp or a day interval
* - TRUE or 'unix' for a timestamp
* - FALSE or 'days' for an interval
* @param string date_format Output date format, same as in date()
* @return array
*/
function date_range($unix_start = '', $mixed = '', $is_unix = TRUE, $format = 'Y-m-d')
{
if ($unix_start == '' OR $mixed == '' OR $format == '')
{
return FALSE;
}
$is_unix = ! ( ! $is_unix OR $is_unix === 'days');
// Validate input and try strtotime() on invalid timestamps/intervals, just in case
if ( ( ! ctype_digit((string) $unix_start) && ($unix_start = @strtotime($unix_start)) === FALSE)
OR ( ! ctype_digit((string) $mixed) && ($is_unix === FALSE OR ($mixed = @strtotime($mixed)) === FALSE))
OR ($is_unix === TRUE && $mixed < $unix_start))
{
return FALSE;
}
if ($is_unix && ($unix_start == $mixed OR date($format, $unix_start) === date($format, $mixed)))
{
return array(date($format, $unix_start));
}
$range = array();
$from = new DateTime();
$from->setTimestamp($unix_start);
if ($is_unix)
{
$arg = new DateTime();
$arg->setTimestamp($mixed);
}
else
{
$arg = (int) $mixed;
}
$period = new DatePeriod($from, new DateInterval('P1D'), $arg);
foreach ($period as $date)
{
$range[] = $date->format($format);
}
/* If a period end date was passed to the DatePeriod constructor, it might not
* be in our results. Not sure if this is a bug or it's just possible because
* the end date might actually be less than 24 hours away from the previously
* generated DateTime object, but either way - we have to append it manually.
*/
if ( ! is_int($arg) && $range[count($range) - 1] !== $arg->format($format))
{
$range[] = $arg->format($format);
}
return $range;
}
}