<?php /** * TDateTimeStamp class file. * * COPYRIGHT * (c) 2003-2005 John Lim and released under BSD-style license except for code by * jackbbs, which includes getTimeStamp, getGMTDiff, isLeapYear * and originally found at http://www.php.net/manual/en/function.mktime.php * * @author Wei Zhuo <weizhuo[at]gamil[dot]com> * @link http://www.pradosoft.com/ * @copyright Copyright © 2006 PradoSoft * @license http://www.pradosoft.com/license/ * @version $Id$ * @package System.Util */ /* This code was originally for windows. But apparently this problem happens also with Linux, RH 7.3 and later! glibc-2.2.5-34 and greater has been changed to return -1 for dates < 1970. This used to work. The problem exists with RedHat 7.3 and 8.0 echo (mktime(0, 0, 0, 1, 1, 1960)); // prints -1 References: http://bugs.php.net/bug.php?id=20048&edit=2 http://lists.debian.org/debian-glibc/2002/debian-glibc-200205/msg00010.html */ if (!defined('ADODB_ALLOW_NEGATIVE_TS') && !defined('ADODB_NO_NEGATIVE_TS')) define('ADODB_NO_NEGATIVE_TS',1); /** * TDateTimeStamp Class * * TDateTimeStamp Class is adpated from the ADOdb Date Library, * part of the ADOdb abstraction library * Download: http://phplens.com/phpeverywhere/ * * http://phplens.com/phpeverywhere/adodb_date_library * * PHP native date functions use integer timestamps for computations. * Because of this, dates are restricted to the years 1901-2038 on Unix * and 1970-2038 on Windows due to integer overflow for dates beyond * those years. This library overcomes these limitations by replacing the * native function's signed integers (normally 32-bits) with PHP floating * point numbers (normally 64-bits). * * Dates from 100 A.D. to 3000 A.D. and later have been tested. The minimum * is 100 A.D. as <100 will invoke the 2 => 4 digit year conversion. * The maximum is billions of years in the future, but this is a theoretical * limit as the computation of that year would take too long with the * current implementation of {@link getTimeStamp}. * * PERFORMANCE * For high speed, this library uses the native date functions where * possible, and only switches to PHP code when the dates fall outside * the 32-bit signed integer range. * * @author Wei Zhuo <weizhuo[at]gmail[dot]com> * @version $Id$ * @package System.Util * @since 3.0.4 */ class TDateTimeStamp { protected static $_month_normal = array("",31,28,31,30,31,30,31,31,30,31,30,31); protected static $_month_leaf = array("",31,29,31,30,31,30,31,31,30,31,30,31); /** * Gets day of week, 0 = Sunday,... 6=Saturday. * Algorithm from PEAR::Date_Calc */ public function getDayofWeek($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 float year to check * @return boolean true if is leap year */ public function isLeapYear($year) { $year = $this->digitCheck($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 && $year % 100 == 0 ) return false; return true; } /** * Fix 2-digit years. Works for any century. * Assumes that if 2-digit is more than 30 years in future, then previous century. * @return integer change two digit year into multiple digits */ protected function digitCheck($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 $y; } public function get4DigitYear($y) { return $this->digitCheck($y); } /** * @return integer get local time zone offset from GMT */ public 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 $TZ; } /** * @return array an array with date info. */ function getDate($d=false,$fast=false) { if ($d === false) return getdate(); // check if number in 32-bit signed range if ((abs($d) <= 0x7FFFFFFF)) { if (!defined('ADODB_NO_NEGATIVE_TS') || $d >= 0) // if windows, must be +ve integer return @getdate($d); } return $this->_getDateInternal($d); } /** * Low-level function that returns the getdate() array. We have a special * $fast flag, which if set to true, will return fewer array values, * and is much faster as it does not calculate dow, etc. * @param float orginal date * @param boolean false to compute the day of the week, default is true * @param boolean true to calculate the GMT dates * @return array an array with date info. */ protected function _getDateInternal($origd=false,$fast=true,$is_gmt=false) { static $YRS; $d = $origd - ($is_gmt ? 0 : $this->getGMTDiff()); $_day_power = 86400; $_hour_power = 3600; $_min_power = 60; if ($d < -12219321600) $d -= 86400*10; // if 15 Oct 1582 or earlier, gregorian correction $_month_table_normal =& self::$_month_normal; $_month_table_leaf = & self::$_month_leaf; $d366 = $_day_power * 366; $d365 = $_day_power * 365; if ($d < 0) { if (empty($YRS)) $YRS = array( 1970 => 0, 1960 => -315619200, 1950 => -631152000, 1940 => -946771200, 1930 => -1262304000, 1920 => -1577923200, 1910 => -1893456000, 1900 => -2208988800, 1890 => -2524521600, 1880 => -2840140800, 1870 => -3155673600, 1860 => -3471292800, 1850 => -3786825600, 1840 => -4102444800, 1830 => -4417977600, 1820 => -4733596800, 1810 => -5049129600, 1800 => -5364662400, 1790 => -5680195200, 1780 => -5995814400, 1770 => -6311347200, 1760 => -6626966400, 1750 => -6942499200, 1740 => -7258118400, 1730 => -7573651200, 1720 => -7889270400, 1710 => -8204803200, 1700 => -8520336000, 1690 => -8835868800, 1680 => -9151488000, 1670 => -9467020800, 1660 => -9782640000, 1650 => -10098172800, 1640 => -10413792000, 1630 => -10729324800, 1620 => -11044944000, 1610 => -11360476800, 1600 => -11676096000); if ($is_gmt) $origd = $d; // The valid range of a 32bit signed timestamp is typically from // Fri, 13 Dec 1901 20:45:54 GMT to Tue, 19 Jan 2038 03:14:07 GMT // # old algorithm iterates through all years. new algorithm does it in # 10 year blocks /* # old algo for ($a = 1970 ; --$a >= 0;) { $lastd = $d; if ($leaf = _adodb_is_leap_year($a)) $d += $d366; else $d += $d365; if ($d >= 0) { $year = $a; break; } } */ $lastsecs = 0; $lastyear = 1970; foreach($YRS as $year => $secs) { if ($d >= $secs) { $a = $lastyear; break; } $lastsecs = $secs; $lastyear = $year; } $d -= $lastsecs; if (!isset($a)) $a = $lastyear; //echo ' yr=',$a,' ', $d,'.'; for (; --$a >= 0;) { $lastd = $d; if ($leaf = $this->isLeapYear($a)) $d += $d366; else $d += $d365; if ($d >= 0) { $year = $a; break; } } /**/ $secsInYear = 86400 * ($leaf ? 366 : 365) + $lastd; $d = $lastd; $mtab = ($leaf) ? $_month_table_leaf : $_month_table_normal; for ($a = 13 ; --$a > 0;) { $lastd = $d; $d += $mtab[$a] * $_day_power; if ($d >= 0) { $month = $a; $ndays = $mtab[$a]; break; } } $d = $lastd; $day = $ndays + ceil(($d+1) / ($_day_power)); $d += ($ndays - $day+1)* $_day_power; $hour = floor($d/$_hour_power); } else { for ($a = 1970 ;; $a++) { $lastd = $d; if ($leaf = $this->isLeapYear($a)) $d -= $d366; else $d -= $d365; if ($d < 0) { $year = $a; break; } } $secsInYear = $lastd; $d = $lastd; $mtab = ($leaf) ? $_month_table_leaf : $_month_table_normal; for ($a = 1 ; $a <= 12; $a++) { $lastd = $d; $d -= $mtab[$a] * $_day_power; if ($d < 0) { $month = $a; $ndays = $mtab[$a]; break; } } $d = $lastd; $day = ceil(($d+1) / $_day_power); $d = $d - ($day-1) * $_day_power; $hour = floor($d /$_hour_power); } $d -= $hour * $_hour_power; $min = floor($d/$_min_power); $secs = $d - $min * $_min_power; if ($fast) { return array( 'seconds' => $secs, 'minutes' => $min, 'hours' => $hour, 'mday' => $day, 'mon' => $month, 'year' => $year, 'yday' => floor($secsInYear/$_day_power), 'leap' => $leaf, 'ndays' => $ndays ); } $dow = $this->getDayofWeek($year,$month,$day); return array( 'seconds' => $secs, 'minutes' => $min, 'hours' => $hour, 'mday' => $day, 'wday' => $dow, 'mon' => $month, 'year' => $year, 'yday' => floor($secsInYear/$_day_power), 'weekday' => gmdate('l',$_day_power*(3+$dow)), 'month' => gmdate('F',mktime(0,0,0,$month,2,1971)), 0 => $origd ); } /** * @return boolean true if valid date, semantic check only. */ public function isValidDate($y,$m,$d) { if ($this->isLeapYear($y)) $marr =& self::$_month_leaf; else $marr =& self::$_month_normal; if ($m > 12 || $m < 1) return false; if ($d > 31 || $d < 1) return false; if ($marr[$m] < $d) return false; if ($y < 1000 && $y > 3000) return false; return true; } /** * @return string formatted date based on timestamp $d */ function formatDate($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 (!defined('ADODB_NO_NEGATIVE_TS') || $d >= 0) return ($is_gmt)? @gmdate($fmt,$d): @date($fmt,$d); } $_day_power = 86400; $arr = $this->getDate($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 = ''; $isphp5 = PHP_VERSION >= 5; /* 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+$this->getDayOfWeek($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 = $this->getGMTDiff(); if ($isphp5) $dates .= sprintf(' %s%04d',($gmt<=0)?'+':'-',abs($gmt)/36); else $dates .= sprintf(' %s%04d',($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 .= $this->getDayOfWeek($year,$month,$day); break; case 'l': $dates .= gmdate('l',$_day_power*(3+$this->getDayOfWeek($year,$month,$day))); break; case 'D': $dates .= gmdate('D',$_day_power*(3+$this->getDayOfWeek($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 : -$this->getGMTDiff(); break; case 'O': $gmt = ($is_gmt) ? 0 : $this->getGMTDiff(); if ($isphp5) $dates .= sprintf('%s%04d',($gmt<=0)?'+':'-',abs($gmt)/36); else $dates .= sprintf('%s%04d',($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 $dates; } /** * Not a very fast algorithm - O(n) operation. Could be optimized to O(1). * @return integer|float a timestamp given a local time. Originally by jackbbs. */ function getTimeStamp($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); // for windows, we don't check 1970 because with timezone differences, // 1 Jan 1970 could generate negative timestamp, which is illegal if (1971 <= $year && $year < 2038 || !defined('ADODB_NO_NEGATIVE_TS') && (1901 < $year && $year < 2038)) { return $is_gmt ? @gmmktime($hr,$min,$sec,$mon,$day,$year) : @mktime($hr,$min,$sec,$mon,$day,$year); } $gmt_different = ($is_gmt) ? 0 : $this->getGMTDiff(); /* # disabled because some people place large values in $sec. # however we need it for $mon because we use an array... $hr = intval($hr); $min = intval($min); $sec = intval($sec); */ $mon = intval($mon); $day = intval($day); $year = intval($year); $year = $this->digitCheck($year); if ($mon > 12) { $y = floor($mon / 12); $year += $y; $mon -= $y*12; } else if ($mon < 1) { $y = ceil((1-$mon) / 12); $year -= $y; $mon += $y*12; } $_day_power = 86400; $_hour_power = 3600; $_min_power = 60; $_month_table_normal = & self::$_month_normal; $_month_table_leaf = & self::$_month_leaf; $_total_date = 0; if ($year >= 1970) { for ($a = 1970 ; $a <= $year; $a++) { $leaf = $this->isLeapYear($a); if ($leaf == true) { $loop_table = $_month_table_leaf; $_add_date = 366; } else { $loop_table = $_month_table_normal; $_add_date = 365; } if ($a < $year) { $_total_date += $_add_date; } else { for($b=1;$b<$mon;$b++) { $_total_date += $loop_table[$b]; } } } $_total_date +=$day-1; $ret = $_total_date * $_day_power + $hr * $_hour_power + $min * $_min_power + $sec + $gmt_different; } else { for ($a = 1969 ; $a >= $year; $a--) { $leaf = $this->isLeapYear($a); if ($leaf == true) { $loop_table = $_month_table_leaf; $_add_date = 366; } else { $loop_table = $_month_table_normal; $_add_date = 365; } if ($a > $year) { $_total_date += $_add_date; } else { for($b=12;$b>$mon;$b--) { $_total_date += $loop_table[$b]; } } } $_total_date += $loop_table[$mon] - $day; $_day_time = $hr * $_hour_power + $min * $_min_power + $sec; $_day_time = $_day_power - $_day_time; $ret = -( $_total_date * $_day_power + $_day_time - $gmt_different); if ($ret < -12220185600) $ret += 10*86400; // if earlier than 5 Oct 1582 - gregorian correction else if ($ret < -12219321600) $ret = -12219321600; // if in limbo, reset to 15 Oct 1582. } //print " dmy=$day/$mon/$year $hr:$min:$sec => " .$ret; return $ret; } } ?>