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-rw-r--r--kohana/helpers/date.php405
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diff --git a/kohana/helpers/date.php b/kohana/helpers/date.php
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-<?php defined('SYSPATH') OR die('No direct access allowed.');
-/**
- * Date helper class.
- *
- * $Id: date.php 4316 2009-05-04 01:03:54Z kiall $
- *
- * @package Core
- * @author Kohana Team
- * @copyright (c) 2007-2008 Kohana Team
- * @license http://kohanaphp.com/license.html
- */
-class date_Core {
-
- /**
- * Converts a UNIX timestamp to DOS format.
- *
- * @param integer UNIX timestamp
- * @return integer
- */
- public static function unix2dos($timestamp = FALSE)
- {
- $timestamp = ($timestamp === FALSE) ? getdate() : getdate($timestamp);
-
- if ($timestamp['year'] < 1980)
- {
- return (1 << 21 | 1 << 16);
- }
-
- $timestamp['year'] -= 1980;
-
- // What voodoo is this? I have no idea... Geert can explain it though,
- // and that's good enough for me.
- return ($timestamp['year'] << 25 | $timestamp['mon'] << 21 |
- $timestamp['mday'] << 16 | $timestamp['hours'] << 11 |
- $timestamp['minutes'] << 5 | $timestamp['seconds'] >> 1);
- }
-
- /**
- * Converts a DOS timestamp to UNIX format.
- *
- * @param integer DOS timestamp
- * @return integer
- */
- public static function dos2unix($timestamp = FALSE)
- {
- $sec = 2 * ($timestamp & 0x1f);
- $min = ($timestamp >> 5) & 0x3f;
- $hrs = ($timestamp >> 11) & 0x1f;
- $day = ($timestamp >> 16) & 0x1f;
- $mon = ($timestamp >> 21) & 0x0f;
- $year = ($timestamp >> 25) & 0x7f;
-
- return mktime($hrs, $min, $sec, $mon, $day, $year + 1980);
- }
-
- /**
- * Returns the offset (in seconds) between two time zones.
- * @see http://php.net/timezones
- *
- * @param string timezone that to find the offset of
- * @param string|boolean timezone used as the baseline
- * @return integer
- */
- public static function offset($remote, $local = TRUE)
- {
- static $offsets;
-
- // Default values
- $remote = (string) $remote;
- $local = ($local === TRUE) ? date_default_timezone_get() : (string) $local;
-
- // Cache key name
- $cache = $remote.$local;
-
- if (empty($offsets[$cache]))
- {
- // Create timezone objects
- $remote = new DateTimeZone($remote);
- $local = new DateTimeZone($local);
-
- // Create date objects from timezones
- $time_there = new DateTime('now', $remote);
- $time_here = new DateTime('now', $local);
-
- // Find the offset
- $offsets[$cache] = $remote->getOffset($time_there) - $local->getOffset($time_here);
- }
-
- return $offsets[$cache];
- }
-
- /**
- * Number of seconds in a minute, incrementing by a step.
- *
- * @param integer amount to increment each step by, 1 to 30
- * @param integer start value
- * @param integer end value
- * @return array A mirrored (foo => foo) array from 1-60.
- */
- public static function seconds($step = 1, $start = 0, $end = 60)
- {
- // Always integer
- $step = (int) $step;
-
- $seconds = array();
-
- for ($i = $start; $i < $end; $i += $step)
- {
- $seconds[$i] = ($i < 10) ? '0'.$i : $i;
- }
-
- return $seconds;
- }
-
- /**
- * Number of minutes in an hour, incrementing by a step.
- *
- * @param integer amount to increment each step by, 1 to 30
- * @return array A mirrored (foo => foo) array from 1-60.
- */
- public static function minutes($step = 5)
- {
- // Because there are the same number of minutes as seconds in this set,
- // we choose to re-use seconds(), rather than creating an entirely new
- // function. Shhhh, it's cheating! ;) There are several more of these
- // in the following methods.
- return date::seconds($step);
- }
-
- /**
- * Number of hours in a day.
- *
- * @param integer amount to increment each step by
- * @param boolean use 24-hour time
- * @param integer the hour to start at
- * @return array A mirrored (foo => foo) array from start-12 or start-23.
- */
- public static function hours($step = 1, $long = FALSE, $start = NULL)
- {
- // Default values
- $step = (int) $step;
- $long = (bool) $long;
- $hours = array();
-
- // Set the default start if none was specified.
- if ($start === NULL)
- {
- $start = ($long === FALSE) ? 1 : 0;
- }
-
- $hours = array();
-
- // 24-hour time has 24 hours, instead of 12
- $size = ($long === TRUE) ? 23 : 12;
-
- for ($i = $start; $i <= $size; $i += $step)
- {
- $hours[$i] = $i;
- }
-
- return $hours;
- }
-
- /**
- * Returns AM or PM, based on a given hour.
- *
- * @param integer number of the hour
- * @return string
- */
- public static function ampm($hour)
- {
- // Always integer
- $hour = (int) $hour;
-
- return ($hour > 11) ? 'PM' : 'AM';
- }
-
- /**
- * Adjusts a non-24-hour number into a 24-hour number.
- *
- * @param integer hour to adjust
- * @param string AM or PM
- * @return string
- */
- public static function adjust($hour, $ampm)
- {
- $hour = (int) $hour;
- $ampm = strtolower($ampm);
-
- switch ($ampm)
- {
- case 'am':
- if ($hour == 12)
- $hour = 0;
- break;
- case 'pm':
- if ($hour < 12)
- $hour += 12;
- break;
- }
-
- return sprintf('%02s', $hour);
- }
-
- /**
- * Number of days in month.
- *
- * @param integer number of month
- * @param integer number of year to check month, defaults to the current year
- * @return array A mirrored (foo => foo) array of the days.
- */
- public static function days($month, $year = FALSE)
- {
- static $months;
-
- // Always integers
- $month = (int) $month;
- $year = (int) $year;
-
- // Use the current year by default
- $year = ($year == FALSE) ? date('Y') : $year;
-
- // We use caching for months, because time functions are used
- if (empty($months[$year][$month]))
- {
- $months[$year][$month] = array();
-
- // Use date to find the number of days in the given month
- $total = date('t', mktime(1, 0, 0, $month, 1, $year)) + 1;
-
- for ($i = 1; $i < $total; $i++)
- {
- $months[$year][$month][$i] = $i;
- }
- }
-
- return $months[$year][$month];
- }
-
- /**
- * Number of months in a year
- *
- * @return array A mirrored (foo => foo) array from 1-12.
- */
- public static function months()
- {
- return date::hours();
- }
-
- /**
- * Returns an array of years between a starting and ending year.
- * Uses the current year +/- 5 as the max/min.
- *
- * @param integer starting year
- * @param integer ending year
- * @return array
- */
- public static function years($start = FALSE, $end = FALSE)
- {
- // Default values
- $start = ($start === FALSE) ? date('Y') - 5 : (int) $start;
- $end = ($end === FALSE) ? date('Y') + 5 : (int) $end;
-
- $years = array();
-
- // Add one, so that "less than" works
- $end += 1;
-
- for ($i = $start; $i < $end; $i++)
- {
- $years[$i] = $i;
- }
-
- return $years;
- }
-
- /**
- * Returns time difference between two timestamps, in human readable format.
- *
- * @param integer timestamp
- * @param integer timestamp, defaults to the current time
- * @param string formatting string
- * @return string|array
- */
- public static function timespan($time1, $time2 = NULL, $output = 'years,months,weeks,days,hours,minutes,seconds')
- {
- // Array with the output formats
- $output = preg_split('/[^a-z]+/', strtolower((string) $output));
-
- // Invalid output
- if (empty($output))
- return FALSE;
-
- // Make the output values into keys
- extract(array_flip($output), EXTR_SKIP);
-
- // Default values
- $time1 = max(0, (int) $time1);
- $time2 = empty($time2) ? time() : max(0, (int) $time2);
-
- // Calculate timespan (seconds)
- $timespan = abs($time1 - $time2);
-
- // All values found using Google Calculator.
- // Years and months do not match the formula exactly, due to leap years.
-
- // Years ago, 60 * 60 * 24 * 365
- isset($years) and $timespan -= 31556926 * ($years = (int) floor($timespan / 31556926));
-
- // Months ago, 60 * 60 * 24 * 30
- isset($months) and $timespan -= 2629744 * ($months = (int) floor($timespan / 2629743.83));
-
- // Weeks ago, 60 * 60 * 24 * 7
- isset($weeks) and $timespan -= 604800 * ($weeks = (int) floor($timespan / 604800));
-
- // Days ago, 60 * 60 * 24
- isset($days) and $timespan -= 86400 * ($days = (int) floor($timespan / 86400));
-
- // Hours ago, 60 * 60
- isset($hours) and $timespan -= 3600 * ($hours = (int) floor($timespan / 3600));
-
- // Minutes ago, 60
- isset($minutes) and $timespan -= 60 * ($minutes = (int) floor($timespan / 60));
-
- // Seconds ago, 1
- isset($seconds) and $seconds = $timespan;
-
- // Remove the variables that cannot be accessed
- unset($timespan, $time1, $time2);
-
- // Deny access to these variables
- $deny = array_flip(array('deny', 'key', 'difference', 'output'));
-
- // Return the difference
- $difference = array();
- foreach ($output as $key)
- {
- if (isset($$key) AND ! isset($deny[$key]))
- {
- // Add requested key to the output
- $difference[$key] = $$key;
- }
- }
-
- // Invalid output formats string
- if (empty($difference))
- return FALSE;
-
- // If only one output format was asked, don't put it in an array
- if (count($difference) === 1)
- return current($difference);
-
- // Return array
- return $difference;
- }
-
- /**
- * Returns time difference between two timestamps, in the format:
- * N year, N months, N weeks, N days, N hours, N minutes, and N seconds ago
- *
- * @param integer timestamp
- * @param integer timestamp, defaults to the current time
- * @param string formatting string
- * @return string
- */
- public static function timespan_string($time1, $time2 = NULL, $output = 'years,months,weeks,days,hours,minutes,seconds')
- {
- if ($difference = date::timespan($time1, $time2, $output) AND is_array($difference))
- {
- // Determine the key of the last item in the array
- $last = end($difference);
- $last = key($difference);
-
- $span = array();
- foreach ($difference as $name => $amount)
- {
- if ($amount === 0)
- {
- // Skip empty amounts
- continue;
- }
-
- // Add the amount to the span
- $span[] = ($name === $last ? ' and ' : ', ').$amount.' '.($amount === 1 ? inflector::singular($name) : $name);
- }
-
- // If the difference is less than 60 seconds, remove the preceding and.
- if (count($span) === 1)
- {
- $span[0] = ltrim($span[0], 'and ');
- }
-
- // Replace difference by making the span into a string
- $difference = trim(implode('', $span), ',');
- }
- elseif (is_int($difference))
- {
- // Single-value return
- $difference = $difference.' '.($difference === 1 ? inflector::singular($output) : $output);
- }
-
- return $difference;
- }
-
-} // End date \ No newline at end of file
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