在php中按天计算月数

$currentDate = date('Y-m-d');
$targetDate = '2022-01-15'; // 目标日期

$currentTimestamp = strtotime($currentDate);
$targetTimestamp = strtotime($targetDate);

$diffInSeconds = $targetTimestamp - $currentTimestamp;

$years = floor($diffInSeconds / (365 * 24 * 60 * 60));
$months = floor(($diffInSeconds - $years * 365 * 24 * 60 * 60) / (30 * 24 * 60 * 60));

$totalMonths = $years * 12 + $months;

echo "按天计算月数：$totalMonths 个月";