PHP Calender (Calendar) Two version code example (fix 2038 problem) _php instance

Note 32-bit machines have 2038 issues, so the age range of 32-bit servers 1970 ~2038

We can also use DateTime to circumvent this problem (this has nothing to do with 32-bit 64-bit)

Copy CodeThe code is as follows:
/**
*
* My Calendar
* Date_default_timezone_set Date Mktime
* @param int $year
* @param int $month
* @param string $timezone
* @author Fc_lamp
* @blog: fc-lamp.blog.163.com
*/
function Mycalender ($year = ', $month = ', $timezone = ' Asia/shanghai ')
{

Date_default_timezone_set ($timezone);
$year = ABS (Intval ($year));
$month = ABS (Intval ($month));

Whether it is a 32-bit machine
if (Is32 ())
{
if ($year < 1970 or $year >= 2038)
{
$year = Date (' Y ');
}
} else
{
if ($year <= 0)
{
$year = Date (' Y ');
}

}

if ($month <= 0 or $month > 12)
{
$month = Date (' m ');
}

Last year
$pretYear = $year-1;
Last month
$mpYear = $year;
$preMonth = $month-1;
if ($preMonth <= 0)
{
$preMonth = 1;
$mpYear = $pretYear;
}

Next year
$nextYear = $year + 1;
Next month
$mnYear = $year;
$nextMonth = $month + 1;
if ($nextMonth > 12)
{
$nextMonth = 1;
$mnYear = $nextYear;
}

Calendar Header
$html = << <>

Last year	Last month	Back to today	Next month	Next year
{$year} year {$month} month
<> HTML;$currentDay = Date (' Y-m-j ');Last day of the month$lastday = Date (' J ', Mktime (0, 0, 0, $nextMonth, 0, $year));Cycle Output Days$day = 1;$line = ";while ($day <= $lastday){$cday = $year. '-' . $month. '-' . $day;Current day of the week$nowWeek = Date (' N ', mktime (0, 0, 0, $month, $day, $year));if ($day = = 1){$line = ' '; $line. = Str_repeat (' ', $nowWeek-1); } if ($cday = = $currentDay) {$style = ' style= ' color:red; ';} else {$style = ';} $line. = " "; End of Week if ($nowWeek = = 7) {$line. = ' ';$html. = $line;$line = ' '; }//All-month End if ($day = = $lastday) {if ($nowWeek! = 7) {$line. = Str_repeat (' ', 7-$nowWeek); } $line. = ' ';$html. = $line;Break}$day + +;}$html. = << Monday Tuesday Wednesday Thursday Friday Saturday Sunday $day

HTML;
return $html;
}

/**
*
* Check if it is a 32-bit machine
* @author Fc_lamp
* @blog: fc-lamp.blog.163.com
*/
function Is32 ()
{
$is = False;
if (Strtotime (' 2039-10-10 ') = = = False)
{
$is = True;
}
return $is 32;
}

Use the DateTime class to solve the 2038 problem, so that there is no 32-bit and 64-bit, the code is as follows:

Copy CodeThe code is as follows:
/**
*
* My Calendar (DateTime version)
* Date_default_timezone_set Date Mktime
* @param int $year
* @param int $month
* @param string $timezone
* @author Fc_lamp
* @blog: fc-lamp.blog.163.com
*/
function Mycalender ($year = ', $month = ', $timezone = ' Asia/shanghai ')
{

Date_default_timezone_set ($timezone);
$year = ABS (Intval ($year));
$month = ABS (Intval ($month));

$nowDate = new DateTime ();

if ($year <= 0)
{
$year = $nowDate->format (' Y ');
}

if ($month <= 0 or $month > 12)
{
$month = $nowDate->format (' m ');
}

Last year
$pretYear = $year-1;
Last month
$mpYear = $year;
$preMonth = $month-1;
if ($preMonth <= 0)
{
$preMonth = 1;
$mpYear = $pretYear;
}

Next year
$nextYear = $year + 1;
Next month
$mnYear = $year;
$nextMonth = $month + 1;
if ($nextMonth > 12)
{
$nextMonth = 1;
$mnYear = $nextYear;
}

Calendar Header
$html = << <>

Last year	Last month	Back to today	Next month	Next year
{$year} year {$month} month
<> HTML;$currentDay = $nowDate->format (' y-m-j ');Last day of the month$creatDate = new DateTime ("$year-$nextMonth-0");$lastday = $creatDate->format (' J ');$creatDate = NULL;Cycle Output Days$day = 1;$line = ";while ($day <= $lastday){$cday = $year. '-' . $month. '-' . $day;Current day of the week$creatDate = new DateTime ("$year-$month-$day");$nowWeek = $creatDate->format (' N ');$creatDate = NULL;if ($day = = 1){$line = ' '; $line. = Str_repeat (' ', $nowWeek-1); } if ($cday = = $currentDay) {$style = ' style= ' color:red; ';} else {$style = ';} $line. = " "; End of Week if ($nowWeek = = 7) {$line. = ' ';$html. = $line;$line = ' '; }//All-month End if ($day = = $lastday) {if ($nowWeek! = 7) {$line. = Str_repeat (' ', 7-$nowWeek); } $line. = ' ';$html. = $line;Break}$day + +;}$html. = << Monday Tuesday Wednesday Thursday Friday Saturday Sunday $day

HTML;
return $html;
}

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