因為專案需要寫到中東國家的一天最多獲得的數量

所以在判斷時，我的寫法就是將時間簡單的+5

但是這樣在凌晨就會有問題

發現之後優化為

 // 獲取區域對應的時區
    public function regionTimeZone($region) {
        if (!array_key_exists($region, $this->regionTimeZoneMap)) {
            return $this->defaultTimeZone;
        }
        return $this->regionTimeZoneMap[$region
 
];
    }

    // 獲取該時區的當前時間
    public function getRegionDateString($region, $format = 'Y-m-d H:i:s') {
        $date = null;
        date_default_timezone_set("Etc/GMT-{$this->regionTimeZone($region)}");
        $date = date($format);
        date_default_timezone_set("Etc/GMT-{$this->defaultTimeZone}");
        
 
return $date;
    }

    // 獲取該時區的當前時間戳
    public function getRegionDateTimestamp($region) {
        $timestamp = null;
        date_default_timezone_set("Etc/GMT-{$this->regionTimeZone($region)}");
        $timestamp = time();
        date_default_timezone_set("Etc/GMT-{$this->defaultTimeZone}");
        
 
return $timestamp;
    }

    // 獲取該時區的當期時間對應某個區域的時間
    public function getRegionConvertTimestamp($sourceRegion, $destRegion, $sourceDate = '') {
        $date = null;
        date_default_timezone_set("Etc/GMT-{$this->regionTimeZone($sourceRegion)}");
        $sourceRegionTimeZone = $this->regionTimeZone($sourceRegion);
        $destRegionTimeZone = $this->regionTimeZone($destRegion);
        if (empty($sourceDate)) {
            $sourceDate = date('Y-m-d H:i:s');
        }
        if ($sourceRegionTimeZone <= $destRegionTimeZone) {
            $timestamp = strtotime($sourceDate . ' + ' . ($destRegionTimeZone - $sourceRegionTimeZone) . ' hours');
        } else {
            $timestamp = strtotime($sourceDate . ' - ' . ($sourceRegionTimeZone - $destRegionTimeZone) . ' hours');
        }
        $date = date('Y-m-d H:i:s', $timestamp);
        date_default_timezone_set("Etc/GMT-{$this->defaultTimeZone}");
        return $date;
    }

    // 獲取該時區的一天開始日期對應某個區域的開始日期
    public function getRegionConvertStartDate($sourceRegion, $destRegion) {
        $date = null;
        date_default_timezone_set("Etc/GMT-{$this->regionTimeZone($sourceRegion)}");
        $sourceRegionTimeZone = $this->regionTimeZone($sourceRegion);
        $destRegionTimeZone = $this->regionTimeZone($destRegion);
        if ($sourceRegionTimeZone <= $destRegionTimeZone) {
            $timestamp = strtotime(date('Y-m-d') . ' 00:00:00' . ' + ' . ($destRegionTimeZone - $sourceRegionTimeZone) . ' hours');
        } else {
            $timestamp = strtotime(date('Y-m-d') . ' 00:00:00' . ' - ' . ($sourceRegionTimeZone - $destRegionTimeZone) . ' hours');
        }
        $date = date('Y-m-d H:i:s', $timestamp);
        date_default_timezone_set("Etc/GMT-{$this->defaultTimeZone}");
        return $date;
    }

    // 獲取該時區的一天結束日期對應某個區域的結束日期
    public function getRegionConvertEndDate($sourceRegion, $destRegion) {
        $date = null;
        date_default_timezone_set("Etc/GMT-{$this->regionTimeZone($sourceRegion)}");
        $sourceRegionTimeZone = $this->regionTimeZone($sourceRegion);
        $destRegionTimeZone = $this->regionTimeZone($destRegion);
        if ($sourceRegionTimeZone <= $destRegionTimeZone) {
            $timestamp = strtotime(date('Y-m-d') . ' 23:59:59' . ' + ' . ($destRegionTimeZone - $sourceRegionTimeZone) . ' hours');
        } else {
            $timestamp = strtotime(date('Y-m-d') . ' 23:59:59' . ' - ' . ($sourceRegionTimeZone - $destRegionTimeZone) . ' hours');
        }
        $date = date('Y-m-d H:i:s', $timestamp);
        date_default_timezone_set("Etc/GMT-{$this->defaultTimeZone}");
        return $date;
    }

謹記！！！