ql-gw-laravel5/app/Http/Controllers/Admin/CommonController.php

<?php
namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use DB;

class CommonController extends Controller
{
	public $user_info;
	
    public function __construct()
    {
        parent::__construct();
		
		if(isset($_SESSION['admin_user_info']))
		{
			$this->user_info = $_SESSION['admin_user_info'];
		}
        else
        {
            header("Location:".route('page404'));
			exit();
        }
    }
	
    /**
     * 获取分页数据及分页导航
     * @param string $modelname 模块名与数据库表名对应
     * @param array  $where     查询条件
     * @param string $orderby   查询排序
     * @param string $field     要返回数据的字段
     * @param int    $listRows  每页数量，默认30条
     * 
     * @return 格式化后输出的数据。内容格式为：
     *     - "code"                 (string)：代码
     *     - "info"                 (string)：信息提示
     * 
     *     - "result" array
     * 
     *     - "img_list"             (array) ：图片队列，默认8张
     *     - "img_title"            (string)：车图名称
     *     - "img_url"              (string)：车图片url地址
     *     - "car_name"             (string)：车名称
     */
    public function pageList($modelname, $where = '', $orderby = '', $field = '*', $listRows = 30)
    {
        $model = \DB::table($modelname);
		
		//查询条件
        if(!empty($where)){$model = $model->where($where);}
		
		//排序
        if($orderby!='')
		{
            if($orderby == 'rand()')
            {
                $model = $model->orderBy(\DB::raw('rand()'));
            }
            else
            {
    			if(count($orderby) == count($orderby, 1))
    			{
    				$model = $model->orderBy($orderby[0], $orderby[1]);
    			}
    			else
    			{
    				foreach($orderby as $row)
    				{
    					$model = $model->orderBy($row[0], $row[1]);
    				}
    			}
            }
		}
        else
        {
            $model = $model->orderBy('id', 'desc');
        }
		
		//要返回的字段
        if($field!='*'){$model = $model->select(\DB::raw($field));}
        
        return $model->paginate($listRows);
    }
}