php 获取指定月第一天和最后一天_PHP教程

function getCurMonthFirstDay($date) {
    return date('Y-m-01', strtotime($date));
}

function getCurMonthLastDay($date) {
    return date('Y-m-d', strtotime(date('Y-m-01', strtotime($date)) . ' +1 month -1 day'));
}

function getNextMonthFirstDay($date) {
    return date('Y-m-d', strtotime(date('Y-m-01', strtotime($date)) . ' +1 month'));
}

function getNextMonthLastDay($date) {
    return date('Y-m-d', strtotime(date('Y-m-01', strtotime($date)) . ' +2 month -1 day'));
}

function getPrevMonthFirstDay($date) {
    return date('Y-m-d', strtotime(date('Y-m-01', strtotime($date)) . ' -1 month'));
}

function getPrevMonthLastDay($date) {
    return date('Y-m-d', strtotime(date('Y-m-01', strtotime($date)) . ' -1 day'));
}