如何获取上个月和下个月的数据？

Question

$year  = 2010;
$month = 10;

如何获取上个月2010-09和下个月2010-11

Answer 1

$date = mktime( 0, 0, 0, $month, 1, $year );
echo strftime( '%B %Y', strtotime( '+1 month', $date ) );
echo strftime( '%B %Y', strtotime( '-1 month', $date ) );

Answer 2

像这样试一下：

$date = mktime(0, 0, 0, $month, 1, $year);
echo date("Y-m", strtotime('-1 month', $date));
echo date("Y-m", strtotime('+1 month', $date));

或者，更简短，就像这样：

echo date("Y-m", mktime(0, 0, 0, $month-1, 1, $year));
echo date("Y-m", mktime(0, 0, 0, $month+1, 1, $year));

Answer 3

PHP在这方面很棒，它将通过为你纠正日期来处理数据溢出…

$PreviousMonth = mktime(0, 0, 0, $month - 1, 1, $year);
$CurrentMonth = mktime(0, 0, 0, $month, 1, $year);
$NextMonth = mktime(0, 0, 0, $month + 1, 1, $year);

echo '<p>Next month is ' . date('Ym', $NextMonth) . 
    ' and previous month is ' . date('Ym', $PreviousMonth . '</p>';