| 包 | system.utils |
|---|---|
| 继承 | class CTimestamp |
| 源自 | 1.0 |
| 版本 | $Id: CTimestamp.PHP 3515 2011-12-28 12:29:24Z mDOMba $ |
| 源码 |
CTimestamp represents a timestamp.
Part of this class was adapted from the ADOdb Date Library 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 getTimestamp, all other methods in this class can work with the extended timestamp range. For getTimestamp, because it is merely a wrapper of 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.
Part of this class was adapted from the ADOdb Date Library 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 getTimestamp, all other methods in this class can work with the extended timestamp range. For getTimestamp, because it is merely a wrapper of 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.
公共方法
| 方法 | 描述 | 定义在 |
|---|---|---|
| formatDate() | Formats a timestamp to a date string. | CTimestamp |
| get4DigitYear() | Returns 4-digit representation of the year. | CTimestamp |
| getDate() | Returns the getdate() array. | CTimestamp |
| getDayofWeek() | Gets day of week, 0 = Sunday,... 6=Saturday. | CTimestamp |
| getGMTDiff() | 返回get local time zone offset from GMT | CTimestamp |
| getTimestamp() | Generates a timestamp. | CTimestamp |
| isLeapYear() | Checks for leap year, returns true if it is. No 2-digit year check. Also | CTimestamp |
| isValidDate() | Checks to see if the year, month, day are valid combination. | CTimestamp |
| isValidTime() | Checks to see if the hour, minute and second are valid. | CTimestamp |
受保护方法
| 方法 | 描述 | 定义在 |
|---|---|---|
| digitCheck() | Fix 2-digit years. Works for any century. | CTimestamp |
方法详细
digitCheck()
方法
|
protected static integer digitCheck(integer $y)
| ||
| $y | integer | year |
| {return} | integer | change two digit year into multiple digits |
protected static function digitCheck($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;
}
Fix 2-digit years. Works for any century. Assumes that if 2-digit is more than 30 years in future, then previous century.
formatDate()
方法
|
public static string formatDate(string $fmt, integer|boolean $d=false, boolean $is_gmt=false)
| ||
| $fmt | string | format pattern |
| $d | integer|boolean | timestamp |
| $is_gmt | boolean | 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;
}
Formats a timestamp to a date string.
get4DigitYear()
方法
|
public static integer get4DigitYear(integer $y)
| ||
| $y | integer | year |
| {return} | integer | 4-digit representation of the year |
public static function get4DigitYear($y)
{
return self::digitCheck($y);
}
Returns 4-digit representation of the year.
getDate()
方法
|
public static array getDate(integer|boolean $d=false, boolean $fast=false, boolean $gmt=false)
| ||
| $d | integer|boolean | original date timestamp. False to use the current timestamp. |
| $fast | boolean | false to compute the day of the week, default is true |
| $gmt | boolean | true to calculate the GMT dates |
| {return} | array | an array with date info. |
public static function getDate($d=false,$fast=false,$gmt=false)
{
if($d===false)
$d=time();
if($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;
}
Returns the getdate() array.
getDayofWeek()
方法
|
public static integer getDayofWeek(integer $year, integer $month, integer $day)
| ||
| $year | integer | year |
| $month | integer | month |
| $day | integer | day |
| {return} | integer | day of week |
public static function getDayofWeek($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);
}
Gets day of week, 0 = Sunday,... 6=Saturday. Algorithm from PEAR::Date_Calc
getGMTDiff()
方法
|
public static integer getGMTDiff()
| ||
| {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;
}
getTimestamp()
方法
|
public static integer|float getTimestamp(integer $hr, integer $min, integer $sec, integer|boolean $mon=false, integer|boolean $day=false, integer|boolean $year=false, boolean $is_gmt=false)
| ||
| $hr | integer | hour |
| $min | integer | minute |
| $sec | integer | second |
| $mon | integer|boolean | month |
| $day | integer|boolean | day |
| $year | integer|boolean | year |
| $is_gmt | boolean | whether this is GMT time. If true, gmmktime() will be used. |
| {return} | integer|float | a timestamp given a local time. |
public static function getTimestamp($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);
}
Generates a timestamp. This is the same as the PHP function http://php.net/manual/en/function.mktime.php.
isLeapYear()
方法
|
public static boolean isLeapYear(integer $year)
| ||
| $year | integer | year to check |
| {return} | boolean | true if is leap year |
public static function isLeapYear($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;
}
Checks for leap year, returns true if it is. No 2-digit year check. Also handles julian calendar correctly.
isValidDate()
方法
|
public static boolean isValidDate(integer $y, integer $m, integer $d)
| ||
| $y | integer | year |
| $m | integer | month |
| $d | integer | day |
| {return} | boolean | true if valid date, semantic check only. |
public static function isValidDate($y,$m,$d)
{
return checkdate($m, $d, $y);
}
Checks to see if the year, month, day are valid combination.
isValidTime()
方法
|
public static boolean isValidTime(integer $h, integer $m, integer $s, boolean $hs24=true)
| ||
| $h | integer | hour |
| $m | integer | minute |
| $s | integer | second |
| $hs24 | boolean | whether the hours should be 0 through 23 (default) or 1 through 12. |
| {return} | boolean | true if valid date, semantic check only. |
public static function isValidTime($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;
}
Checks to see if the hour, minute and second are valid.