/*创建日期类型记录表格*/

CREATE TABLE `tb_workday` (

`did` int(11) NOT NULL AUTO_INCREMENT,

`exact_date` varchar(32) NOT NULL COMMENT '具体日期：格式date("Ymd");(20170205)',

`date_year` varchar(32) NOT NULL COMMENT '具体日期：格式date("Y");(2017)',

`date_type` tinyint(2) NOT NULL COMMENT '日期类型：0、工作日；1、特殊工作日；2、法定节假日',

PRIMARY KEY (`did`)

) ENGINE=InnoDB AUTO_INCREMENT=829 DEFAULT CHARSET=utf8 COMMENT='各年工作日&法定节假日数据'

<?php

 

class work_days

{

 /**

 * 获取星期

 * @param $date

 * @return mixed

 */

 function get_week($date)

 {

 //强制转换日期格式

 $date_str = date('Y-m-d', strtotime($date));

 //封装成数组

 $arr = explode("-", $date_str);

 //参数赋值

 //年

 $year = $arr[0];

 //月，输出2位整型，不够2位右对齐

 $month = sprintf('%02d', $arr[1]);

 //日，输出2位整型，不够2位右对齐

 $day = sprintf('%02d', $arr[2]);

 //时分秒默认赋值为0；

 $hour = $minute = $second = 0;

 //转换成时间戳

 $strap = mktime($hour, $minute, $second, $month, $day, $year);

 //获取数字型星期几

 $number_wk = date("w", $strap);

 

 //获取数字对应的星期

 return $number_wk;

 

 //自定义星期数组

 //$weekArr = array("星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六");

 

 //获取数字对应的星期

 //return $weekArr[$number_wk];

 }

 

 

 /**

 * 获取指定日期段内每一天的日期

 * @param string $startdate 开始日期

 * @param string $enddate 结束日期

 * @return array

 */

 function getDateFromRange($startdate, $enddate)

 {

 $stimestamp = strtotime($startdate);

 $etimestamp = strtotime($enddate);

 

 // 计算日期段内有多少天

 $days = ($etimestamp - $stimestamp) / 86400 + 1;

 

 // 保存每天日期

 $_list_date = array();

 for ($i = 0; $i < $days; $i++) {

 $_list_date[] = date('Y-m-d', $stimestamp + (86400 * $i));

 }

 return $_list_date;

 }

 

 function curl_post($url, $data = null)

 {

 $curl = curl_init();

 curl_setopt($curl, CURLOPT_URL, $url);

 curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);

 curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);

 if (!empty($data)) {

 curl_setopt($curl, CURLOPT_POST, 1);

 curl_setopt($curl, CURLOPT_POSTFIELDS, $data);

 }

 curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

 $output = curl_exec($curl);

 curl_close($curl);

 return $output;

 }

 

 /**

 * 更新数据库指定年份日期数据

 * @param $year

 * @return int

 */

 function updateDate($year)

 {

 $startDate = date('Y-m-d', strtotime($year . '-01-01'));

 $endDate = date('Y-m-d', strtotime('+1 year', strtotime($startDate)) - 86400);

 $_list_date = self::getDateFromRange($startDate, $endDate);

 

 $url = 'http://api.goseek.cn/Tools/holiday';//自行查找的免费API

 

 $m = M('tb_workday');

 $count = 0;

 

 foreach ($_list_date as $k => $_date) {

 $_ret = 0;

 $_date = date('Ymd', strtotime($_date));

 $_post_data = array('date' => $_date);

 $_ret_curl = curl_post($url, $_post_data);

 $_ret_curl = json_decode($_ret_curl, true);

 

 //工作日

 if ($_ret_curl['data'] == 0) {

 $dateData['exact_date'] = $_date;

 $dateData['date_year'] = $year;

 $dateData['date_type'] = 0;

 $_ret = $m->add($dateData) ? 1 : 0;

 unset($dateData);

 

 

 //工作日 判断是否为周末

 if (in_array(self::get_week($_date), array(0, 1))) {

  //特殊工作日

  $dateData['exact_date'] = $_date;

  $dateData['date_year'] = $year;

  $dateData['date_type'] = 1;

  $_ret = $m->add($dateData) ? 1 : 0;

  unset($dateData);

 }

 }

 

 //法定节假日

 if ($_ret_curl['data'] == 2) {

 $dateData['exact_date'] = $_date;

 $dateData['date_year'] = $year;

 $dateData['date_type'] = 2;

 $_ret = $m->add($dateData) ? 1 : 0;

 unset($dateData);

 }

 

 //休息日(周末) 暂不处理

 /*if ($_ret_curl['data'] == 1) {

 

 }*/

 $_ret && $count++;

 unset($_date, $_post_data, $_ret_curl, $_ret);

 }

 return $count;

 }

 

 /**

 * 获取当年所有工作日 (从数据库获取，数据库无数据则先更新数据)

 * @param string $year 当年年份

 * @return array

 */

 private function getWorkDays($year)

 {

 $m = M('tb_workday');

 $map['date_year'] = $year;

 $map['date_type'] = 0;

 $DateArray = $m->field('exact_date')->where($map)->select();

 if (!empty($DateArray)) {

 $DateArray = array_column($DateArray, 'exact_date');

 return $DateArray;

 } else {

 //更新数据库工作日数据

 $ret = self::updateDate($year);

 if ($ret > 0) {

 return self::getWorkDays($year);

 } else {

 return false;

 }

 }

 }

 

 /**

 * 获取开始日期后第N个工作日具体日期

 * @param $startdate string 计算开始日期 需包含年月日信息

 * @param $days int 间隔天数

 * @return mixed 成功返回 对应日期，失败返回false

 */

 public function getNextWorkDate($startdate, $days)

 {

 $year = date('Y', strtotime($startdate));

 $startdate = date('Y-m-d', strtotime($startdate));

 

 $workDays = $this->getWorkDays($year);

 

 $search_key = array_search(date('Ymd', strtotime($startdate)), $workDays);

 

 if ($search_key === false) {//查询日期为非工作

 //获取查询日期前最近工作日

 $m = M('tb_workday');

 $map['date_year'] = $year;

 $map['date_type'] = 0;

 $map['DATE_FORMAT(`exact_date`,\'%Y-%m-%d\')'] = array('LT', $startdate);

 $_search_date = $m->where($map)->order('`exact_date` DESC')->getField('exact_date');

 $search_key = array_search($_search_date, $workDays);

 unset($m, $map, $_search_date);

 }

 

 $t_key = $search_key + $days;

 

 if ($t_key <= count($workDays) - 1) {

 return date('Y-m-d', strtotime($workDays[$t_key]));

 } else {

 //查询日期已跨年

 $n_days = $days - (count($workDays) - 1 - $search_key);

 $next_year = $year + 1;

 return $this->getNextWorkDate($next_year . '-01-01', $n_days - 1);

 }

 }

}

 

 

$startdate = '2018-09-28';

$days = 5;

 

$class = new work_days();

$_date_workday = $class->getNextWorkDate($startdate, $days);

echo $_date_workday;//2018-10-10