laravel - 如何向 Laravel Carbon 添加自定义方法

Question

我一直在寻找这个问题 2 天但没有运气。我想向 laravel carbon 添加自定义方法。我使用以下语法：

namespace App\Http\Controllers\Helpers;

use Carbon\CarbonInterface;

interface CarbonJalaliInterface extends CarbonInterface {

    public function toJalaliDateTimeString($unitPrecision = 'second');
    public function toJalaliDateString($unitPrecision = 'second');

}

abstract class CarbonJalali implements CarbonJalaliInterface {

    public function toJalaliDateTimeString($unitPrecision = 'second') {
        list($part1, $part2) = explode(' ', $this->rawFormat('Y-m-d '.static::getTimeFormatByPrecision($unitPrecision)));
        list($year, $month, $day) = explode('-', $part1);
        list($hour, $minute, $second) = explode(':', $part2);
        $timestamp = mktime($hour, $minute, $second, $month, $day, $year);
        include_once ('jdf.php');
        $jalali_date = jdate("H:i:s - Y/m/d",$timestamp);
        return $jalali_date;
    }

    public function toJalaliDateString($unitPrecision = 'second') {
        $timezone = 0;
        list($part1, $part2) = explode(' ', $this->rawFormat('Y-m-d'));
        list($year, $month, $day) = explode('-', $part1);
        $timestamp = mktime($month, $day, $year);
        include_once ('jdf.php');
        $jalali_date = jdate("Y/m/d",$timestamp);
        return $jalali_date;
    }

}

但我得到错误：

Symfony\Component\Debug\Exception\FatalErrorException DateTimeInterface can't be implemented by user classes

我想这样使用它：

CarbonJalali::now()->toJalaliDateTimeString();

有什么建议么？谢谢。

标签： laravel