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

Note that 32-bit machine has 2038 problems, so 32-bit server life span 1970 ~2038 years

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

Copy Code code as follows:

<?php
/**
*
* 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 = <<<table width= "border=" 1 ">
&LT;TR align= "center" >
<td><a href= "? y= $pretYear" > Last year </a></td>
<td><a href= "? y= $mpYear &m= $preMonth" > Last month </a></td>
<td><a href= "?" > Back to Today </a></td>
<td><a href= "? y= $mnYear &m= $nextMonth" > next month </a></td>
<td><a href= "? y= $nextYear" > next year </a></td>
</tr>
&LT;TR align= "center" >
&LT;TD colspan= "5" >{$year} year {$month} month </td>
</tr>
<tr>
&LT;TD colspan= "5" >
<table width= "100%" border= "1" >
&LT;TR align= "center" >
&LT;TD style= "Background-color: #DAF0DD;" > Monday </td>
&LT;TD style= "Background-color: #DAF0DD;" > Tuesday </td>
&LT;TD style= "Background-color: #DAF0DD;" > Wednesday </td>
&LT;TD style= "Background-color: #DAF0DD;" > Thursday </td>
&LT;TD style= "Background-color: #DAF0DD;" > Friday </td>
&LT;TD style= "Background-color: #F60; color: #fff; font-weight:bold;" > Saturday </td>
&LT;TD style= "Background-color: #F60; color: #fff; font-weight:bold;" > Sunday </td>
</tr>
HTML;

$currentDay = Date (' Y-m-j ');

The 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 = ' <tr align= ' center ' > ';
$line. = Str_repeat (' <td> </td> ', $nowWeek-1);
}

if ($cday = = $currentDay)
{
$style = ' style= ' color:red; "';
} else
{
$style = ';
}

$line. = "<td $style > $day </td>";

The end of a week
if ($nowWeek = = 7)
{
$line. = ' </tr> ';
$html. = $line;
$line = ' <tr align= ' center ' > ';
}

All month End
if ($day = = $lastday)
{
if ($nowWeek!= 7)
{
$line. = Str_repeat (' <td> </td> ', 7-$nowWeek);
}
$line. = ' </tr> ';
$html. = $line;

Break
}

$day + +;
}

$html. = <<</table>
</td>
</tr>
</table>
HTML;
return $html;
}

/**
*
* Detect whether it is 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 troubleshoot 2038 problems, which are no more than 32 bits and 64 bits, as follows:

Copy Code code as follows:

<?php
/**
*
* 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 = <<<table width= "border=" 1 ">
&LT;TR align= "center" >
<td><a href= "? y= $pretYear" > Last year </a></td>
<td><a href= "? y= $mpYear &m= $preMonth" > Last month </a></td>
<td><a href= "?" > Back to Today </a></td>
<td><a href= "? y= $mnYear &m= $nextMonth" > next month </a></td>
<td><a href= "? y= $nextYear" > next year </a></td>
</tr>
&LT;TR align= "center" >
&LT;TD colspan= "5" >{$year} year {$month} month </td>
</tr>
<tr>
&LT;TD colspan= "5" >
<table width= "100%" border= "1" >
&LT;TR align= "center" >
&LT;TD style= "Background-color: #DAF0DD;" > Monday </td>
&LT;TD style= "Background-color: #DAF0DD;" > Tuesday </td>
&LT;TD style= "Background-color: #DAF0DD;" > Wednesday </td>
&LT;TD style= "Background-color: #DAF0DD;" > Thursday </td>
&LT;TD style= "Background-color: #DAF0DD;" > Friday </td>
&LT;TD style= "Background-color: #F60; color: #fff; font-weight:bold;" > Saturday </td>
&LT;TD style= "Background-color: #F60; color: #fff; font-weight:bold;" > Sunday </td>
</tr>
HTML;

$currentDay = $nowDate->format (' y-m-j ');

The 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 = ' <tr align= ' center ' > ';
$line. = Str_repeat (' <td> </td> ', $nowWeek-1);
}

if ($cday = = $currentDay)
{
$style = ' style= ' color:red; "';
} else
{
$style = ';
}

$line. = "<td $style > $day </td>";

The end of a week
if ($nowWeek = = 7)
{
$line. = ' </tr> ';
$html. = $line;
$line = ' <tr align= ' center ' > ';
}

All month End
if ($day = = $lastday)
{
if ($nowWeek!= 7)
{
$line. = Str_repeat (' <td> </td> ', 7-$nowWeek);
}
$line. = ' </tr> ';
$html. = $line;

Break
}

$day + +;
}

$html. = <<</table>
</td>
</tr>
</table>
HTML;
return $html;
}