Php laravel中的时区（）未知或错误

代码：

模型：company.php

public function attendance()
{
    $company = admin()->company;
    if ($company->office_start_time != NULL && $company->office_end_time != NULL) {
        $this->officeStartTime = $company->getOfficeStartTime()->timezone($company->timezone)->format('g:i A');
        $this->officeEndTime = $company->getOfficeEndTime()->timezone($company->timezone)->format('g:i A');
    }
    return \View::make('admin.company_settings.attendance', $this->data);
}

---

这是因为在下面的行中

<?php
namespace App\Models;
use App\Observers\CompanyObserver;
use Carbon\Carbon;
use Laravel\Cashier\Billable;
class Company extends \Eloquent
{
    use Billable;
    protected $fillable = ['company_name','contact','address','name','email','country','timezone','logo','locale','billing_address','currency','currency_symbol'];
    protected $dates = ['deleted_at', 'last_login', 'trial_ends_at', 'subscription_ends_at', 'licence_expire_on'];
    protected $appends = ['logo_image_url'];

    public function getTimezoneAttribute($value)
    {
        return explode("=", $value)[0];
    }

    public function getTimezoneIndexAttribute()
    {
        return explode("=", $this->attributes["timezone"])[1];
    }

    public function getOfficeEndTime(Carbon $date = null)
    {
        if ($date == null) {
            $date = Carbon::now();
        }
        $dateStr = $date->format("Y-m-d");
        $end = Carbon::createFromFormat("Y-m-d H:i:s", $dateStr . " " . $this->attributes["office_end_time"]);
        $start = Carbon::createFromFormat("Y-m-d H:i:s", $dateStr . " " . $this->attributes["office_start_time"]);
        if ($end < $start) {
            $end->addDay();
        }
        return $end;
    }
    public function getOfficeStartTime(Carbon $date = null)
    {
        if ($date == null) {
            $date = Carbon::now();
        }
        $dateStr = $date->format("Y-m-d");
        $start = Carbon::createFromFormat("Y-m-d H:i:s", $dateStr . " " . $this->attributes["office_start_time"]);
        return $start;
    }
}

$company->timezone
公司的时区未设置或设置了错误的值


也

$company->timezone
的值是什么？它不显示任何内容
“timezone”：“
@lagbox听起来不像有效的时区如何创建有效的时区@lagbox我们如何设置
$company->timezone
@phpdroidy您必须有公司模型表，其中必须有此字段，可能在公司的设置中使用dd（$company->timezone）在前面的行中。此停止执行并在（）内显示值@KlintIf empty未设置…@phpdroid的响应也是正确的。您必须了解模型公司在字段timezone中的值为null或空的原因。。。
$this->officeStartTime = $company->getOfficeStartTime()->timezone($company->timezone)->format('g:i A');

$this->officeStartTime = $company->getOfficeStartTime()->timezone($company->timezone!=''?$company->timezone:'somehardcodedtimezone')->format('g:i A');