csapi/application/index/model/LogApiModel.php

<?php
namespace app\index\model;
use think\Model;
use think\Db;
class LogApiModel extends Model
{

    public function __construct()
    {
        $date = date('Ymd',time());
        $this->table = 'log_api'.'_'.$date;
        $exist = Db::query('show tables like "'.$this->table.'"');
        if(empty($exist)){
            $sql = "CREATE TABLE IF NOT EXISTS {$this->table} LIKE log_api";
            Db::execute($sql);
        }
        parent::__construct();
    }


}