duanju_track_hapi/app/model/TableSuffix.php

<?php

namespace App\model;

trait TableSuffix
{
    private static $suffix;

    public static function suffix($suffix)
    {
        static::$suffix = $suffix;
    }

    public function __construct(array $attributes = [])
    {
        $this->table .= static::$suffix;
        parent::__construct($attributes);
    }

    public static function model(int $month = 0)
    {
        $suffix = '';
        if ($month == 0) {
            $suffix = date('Ym');
        } else {
            $suffix = date('Ym', strtotime("last day of {$month} month"));
        }
        self::suffix($suffix);
        $model = new self;
        return $model;
    }
}