博客

<?php

$cur = '2020-01-01';


function getNextMonthCurDayOrLastDay($date) {
    // 先判断下个月有没有当前月份的今天，有的话下个月取今天，没有的话下个月取最后一天
    $curDay = date('d', strtotime($date));
    $lastDayOfNextMonth = date('d', strtotime("last day of next month", strtotime($date)));
    if ($curDay <= $lastDayOfNextMonth) {
        $retDate = date('Y-m-d', strtotime("+1 month", strtotime(($date))));
    } else {
        $retDate = date('Y-m-d', strtotime("last day of next month", strtotime($date)));
    }
    return $retDate;
}

// echo getNextMonthCurDayOrLastDay('2020-01-28');

// 测试一年的数据
for ($i = 0; $i < 366; $i++) {
    echo getNextMonthCurDayOrLastDay($cur).PHP_EOL;
    $cur = date('Y-m-d', strtotime("+1 day", strtotime($cur)));
}