/framework/utils/CTimestamp.php
PHP | 376 lines | 214 code | 34 blank | 128 comment | 82 complexity | 3ea910595c680f3729a12c3b0b714cef MD5 | raw file
Possible License(s): BSD-2-Clause, LGPL-2.1, BSD-3-Clause
- <?php
- /**
- * CTimestamp class file.
- *
- * @author Wei Zhuo <weizhuo[at]gamil[dot]com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright © 2008-2011 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
- /**
- * CTimestamp represents a timestamp.
- *
- * Part of this class was adapted from the ADOdb Date Library
- * {@link http://phplens.com/phpeverywhere/ ADOdb abstraction library}.
- * The original source code was released under both BSD and GNU Lesser GPL
- * library license, with the following copyright notice:
- * Copyright (c) 2000, 2001, 2002, 2003, 2004 John Lim
- * All rights reserved.
- *
- * This class is provided to support UNIX timestamp that is beyond the range
- * of 1901-2038 on Unix and1970-2038 on Windows. Except {@link getTimestamp},
- * all other methods in this class can work with the extended timestamp range.
- * For {@link getTimestamp}, because it is merely a wrapper of
- * {@link mktime http://php.net/manual/en/function.mktime.php}, it may still
- * be subject to the limit of timestamp range on certain platforms. Please refer
- * to the PHP manual for more information.
- *
- * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
- * @version $Id: CTimestamp.php 3204 2011-05-05 21:36:32Z alexander.makarow $
- * @package system.utils
- * @since 1.0
- */
- class CTimestamp
- {
- /**
- * Gets day of week, 0 = Sunday,... 6=Saturday.
- * Algorithm from PEAR::Date_Calc
- * @param integer $year year
- * @param integer $month month
- * @param integer $day day
- * @return integer day of week
- */
- public static function getDayofWeek($year, $month, $day)
- {
- /*
- Pope Gregory removed 10 days - October 5 to October 14 - from the year 1582 and
- proclaimed that from that time onwards 3 days would be dropped from the calendar
- every 400 years.
- Thursday, October 4, 1582 (Julian) was followed immediately by Friday, October 15, 1582 (Gregorian).
- */
- if ($year <= 1582)
- {
- if ($year < 1582 ||
- ($year == 1582 && ($month < 10 || ($month == 10 && $day < 15))))
- {
- $greg_correction = 3;
- }
- else
- {
- $greg_correction = 0;
- }
- }
- else
- {
- $greg_correction = 0;
- }
- if($month > 2)
- $month -= 2;
- else
- {
- $month += 10;
- $year--;
- }
- $day = floor((13 * $month - 1) / 5) +
- $day + ($year % 100) +
- floor(($year % 100) / 4) +
- floor(($year / 100) / 4) - 2 *
- floor($year / 100) + 77 + $greg_correction;
- return $day - 7 * floor($day / 7);
- }
- /**
- * Checks for leap year, returns true if it is. No 2-digit year check. Also
- * handles julian calendar correctly.
- * @param integer $year year to check
- * @return boolean true if is leap year
- */
- public static function isLeapYear($year)
- {
- $year = self::digitCheck($year);
- if ($year % 4 != 0)
- return false;
- if ($year % 400 == 0)
- return true;
- // if gregorian calendar (>1582), century not-divisible by 400 is not leap
- else if ($year > 1582 && $year % 100 == 0 )
- return false;
- return true;
- }
- /**
- * Fix 2-digit years. Works for any century.
- * Assumes that if 2-digit is more than 30 years in future, then previous century.
- * @param integer $y year
- * @return integer change two digit year into multiple digits
- */
- protected static function digitCheck($y)
- {
- if ($y < 100){
- $yr = (integer) date("Y");
- $century = (integer) ($yr /100);
- if ($yr%100 > 50) {
- $c1 = $century + 1;
- $c0 = $century;
- } else {
- $c1 = $century;
- $c0 = $century - 1;
- }
- $c1 *= 100;
- // if 2-digit year is less than 30 years in future, set it to this century
- // otherwise if more than 30 years in future, then we set 2-digit year to the prev century.
- if (($y + $c1) < $yr+30) $y = $y + $c1;
- else $y = $y + $c0*100;
- }
- return $y;
- }
- /**
- * Returns 4-digit representation of the year.
- * @param integer $y year
- * @return integer 4-digit representation of the year
- */
- public static function get4DigitYear($y)
- {
- return self::digitCheck($y);
- }
- /**
- * @return integer get local time zone offset from GMT
- */
- public static function getGMTDiff()
- {
- static $TZ;
- if (isset($TZ)) return $TZ;
- $TZ = mktime(0,0,0,1,2,1970) - gmmktime(0,0,0,1,2,1970);
- return $TZ;
- }
- /**
- * Returns the getdate() array.
- * @param integer|boolean $d original date timestamp. False to use the current timestamp.
- * @param boolean $fast false to compute the day of the week, default is true
- * @param boolean $gmt true to calculate the GMT dates
- * @return array an array with date info.
- */
- public static function getDate($d=false,$fast=false,$gmt=false)
- {
- if($gmt)
- {
- $tz = date_default_timezone_get();
- date_default_timezone_set('GMT');
- $result = getdate($d);
- date_default_timezone_set($tz);
- }
- else
- {
- $result = getdate($d);
- }
- return $result;
- }
- /**
- * Checks to see if the year, month, day are valid combination.
- * @param integer $y year
- * @param integer $m month
- * @param integer $d day
- * @return boolean true if valid date, semantic check only.
- */
- public static function isValidDate($y,$m,$d)
- {
- return checkdate($m, $d, $y);
- }
- /**
- * Checks to see if the hour, minute and second are valid.
- * @param integer $h hour
- * @param integer $m minute
- * @param integer $s second
- * @param boolean $hs24 whether the hours should be 0 through 23 (default) or 1 through 12.
- * @return boolean true if valid date, semantic check only.
- * @since 1.0.5
- */
- public static function isValidTime($h,$m,$s,$hs24=true)
- {
- if($hs24 && ($h < 0 || $h > 23) || !$hs24 && ($h < 1 || $h > 12)) return false;
- if($m > 59 || $m < 0) return false;
- if($s > 59 || $s < 0) return false;
- return true;
- }
- /**
- * Formats a timestamp to a date string.
- * @param string $fmt format pattern
- * @param integer|boolean $d timestamp
- * @param boolean $is_gmt whether this is a GMT timestamp
- * @return string formatted date based on timestamp $d
- */
- public static function formatDate($fmt,$d=false,$is_gmt=false)
- {
- if ($d === false)
- return ($is_gmt)? @gmdate($fmt): @date($fmt);
- // check if number in 32-bit signed range
- if ((abs($d) <= 0x7FFFFFFF))
- {
- // if windows, must be +ve integer
- if ($d >= 0)
- return ($is_gmt)? @gmdate($fmt,$d): @date($fmt,$d);
- }
- $_day_power = 86400;
- $arr = self::getDate($d,true,$is_gmt);
- $year = $arr['year'];
- $month = $arr['mon'];
- $day = $arr['mday'];
- $hour = $arr['hours'];
- $min = $arr['minutes'];
- $secs = $arr['seconds'];
- $max = strlen($fmt);
- $dates = '';
- /*
- at this point, we have the following integer vars to manipulate:
- $year, $month, $day, $hour, $min, $secs
- */
- for ($i=0; $i < $max; $i++)
- {
- switch($fmt[$i])
- {
- case 'T': $dates .= date('T');break;
- // YEAR
- case 'L': $dates .= $arr['leap'] ? '1' : '0'; break;
- case 'r': // Thu, 21 Dec 2000 16:01:07 +0200
- // 4.3.11 uses '04 Jun 2004'
- // 4.3.8 uses ' 4 Jun 2004'
- $dates .= gmdate('D',$_day_power*(3+self::getDayOfWeek($year,$month,$day))).', '
- . ($day<10?'0'.$day:$day) . ' '.date('M',mktime(0,0,0,$month,2,1971)).' '.$year.' ';
- if ($hour < 10) $dates .= '0'.$hour; else $dates .= $hour;
- if ($min < 10) $dates .= ':0'.$min; else $dates .= ':'.$min;
- if ($secs < 10) $dates .= ':0'.$secs; else $dates .= ':'.$secs;
- $gmt = self::getGMTDiff();
- $dates .= sprintf(' %s%04d',($gmt<=0)?'+':'-',abs($gmt)/36);
- break;
- case 'Y': $dates .= $year; break;
- case 'y': $dates .= substr($year,strlen($year)-2,2); break;
- // MONTH
- case 'm': if ($month<10) $dates .= '0'.$month; else $dates .= $month; break;
- case 'Q': $dates .= ($month+3)>>2; break;
- case 'n': $dates .= $month; break;
- case 'M': $dates .= date('M',mktime(0,0,0,$month,2,1971)); break;
- case 'F': $dates .= date('F',mktime(0,0,0,$month,2,1971)); break;
- // DAY
- case 't': $dates .= $arr['ndays']; break;
- case 'z': $dates .= $arr['yday']; break;
- case 'w': $dates .= self::getDayOfWeek($year,$month,$day); break;
- case 'l': $dates .= gmdate('l',$_day_power*(3+self::getDayOfWeek($year,$month,$day))); break;
- case 'D': $dates .= gmdate('D',$_day_power*(3+self::getDayOfWeek($year,$month,$day))); break;
- case 'j': $dates .= $day; break;
- case 'd': if ($day<10) $dates .= '0'.$day; else $dates .= $day; break;
- case 'S':
- $d10 = $day % 10;
- if ($d10 == 1) $dates .= 'st';
- else if ($d10 == 2 && $day != 12) $dates .= 'nd';
- else if ($d10 == 3) $dates .= 'rd';
- else $dates .= 'th';
- break;
- // HOUR
- case 'Z':
- $dates .= ($is_gmt) ? 0 : -self::getGMTDiff(); break;
- case 'O':
- $gmt = ($is_gmt) ? 0 : self::getGMTDiff();
- $dates .= sprintf('%s%04d',($gmt<=0)?'+':'-',abs($gmt)/36);
- break;
- case 'H':
- if ($hour < 10) $dates .= '0'.$hour;
- else $dates .= $hour;
- break;
- case 'h':
- if ($hour > 12) $hh = $hour - 12;
- else {
- if ($hour == 0) $hh = '12';
- else $hh = $hour;
- }
- if ($hh < 10) $dates .= '0'.$hh;
- else $dates .= $hh;
- break;
- case 'G':
- $dates .= $hour;
- break;
- case 'g':
- if ($hour > 12) $hh = $hour - 12;
- else {
- if ($hour == 0) $hh = '12';
- else $hh = $hour;
- }
- $dates .= $hh;
- break;
- // MINUTES
- case 'i': if ($min < 10) $dates .= '0'.$min; else $dates .= $min; break;
- // SECONDS
- case 'U': $dates .= $d; break;
- case 's': if ($secs < 10) $dates .= '0'.$secs; else $dates .= $secs; break;
- // AM/PM
- // Note 00:00 to 11:59 is AM, while 12:00 to 23:59 is PM
- case 'a':
- if ($hour>=12) $dates .= 'pm';
- else $dates .= 'am';
- break;
- case 'A':
- if ($hour>=12) $dates .= 'PM';
- else $dates .= 'AM';
- break;
- default:
- $dates .= $fmt[$i]; break;
- // ESCAPE
- case "\\":
- $i++;
- if ($i < $max) $dates .= $fmt[$i];
- break;
- }
- }
- return $dates;
- }
- /**
- * Generates a timestamp.
- * This is the same as the PHP function {@link mktime http://php.net/manual/en/function.mktime.php}.
- * @param integer $hr hour
- * @param integer $min minute
- * @param integer $sec second
- * @param integer|boolean $mon month
- * @param integer|boolean $day day
- * @param integer|boolean $year year
- * @param boolean $is_gmt whether this is GMT time. If true, gmmktime() will be used.
- * @return integer|float a timestamp given a local time.
- */
- public static function getTimestamp($hr,$min,$sec,$mon=false,$day=false,$year=false,$is_gmt=false)
- {
- if ($mon === false)
- return $is_gmt? @gmmktime($hr,$min,$sec): @mktime($hr,$min,$sec);
- return $is_gmt ? @gmmktime($hr,$min,$sec,$mon,$day,$year) : @mktime($hr,$min,$sec,$mon,$day,$year);
- }
- }