介紹：根據不同的許可權，在選單欄顯示不同的功能，只對選單進行了限制，若對路由也進行限制，請自行完善

1、建表（使用者表、角色表、許可權表、使用者角色表、角色許可權表）

CREATE TABLE IF NOT EXISTS mr_role
(
id int(11) PRIMARY KEY AUTO_INCREMENT COMMENT '自增id',
name varchar(30) NOT NULL COMMENT '角色名'
)ENGINE=innodb DEFAULT CHARSET=utf8 COMMENT='角色表';

CREATE TABLE IF NOT EXISTS mr_privilege
(
id int(11) PRIMARY KEY AUTO_INCREMENT COMMENT '自增id',
name varchar(30) NOT NULL COMMENT '許可權名',
route varchar(50) NOT NULL COMMENT '許可權所有的路由',
description varchar(100) NOT NULL COMMENT '許可權的描述'
)ENGINE=innodb DEFAULT CHARSET=utf8 COMMENT='許可權表';
 

CREATE TABLE IF NOT EXISTS mr_user_role
(
id int(11) PRIMARY KEY AUTO_INCREMENT COMMENT '自增id',
user_id int(11) NOT NULL COMMENT '使用者id',
role_id int(11) NOT NULL COMMENT '角色id'
)ENGINE=innodb DEFAULT CHARSET=utf8 COMMENT='使用者角色表';

CREATE TABLE IF NOT EXISTS mr_role_privilege
(
id int(11) PRIMARY KEY AUTO_INCREMENT COMMENT '自增id',
role_id int(11) NOT NULL COMMENT '角色id',
privilege_id int(11) NOT NULL COMMENT '許可權id'
)ENGINE=innodb DEFAULT CHARSET=utf8 COMMENT='角色許可權表';
 

2、在使用者模型和角色模型中實現多對多

class User extends Model
{
    protected $primaryKey = 'id';
    protected $table = 'user';

    public $timestamps = false;
    public $guarded = [];

    public function roles()
    {
        return $this->belongsToMany('App\Model\Role', 'user_role', 'user_id', 'role_id')->withPivot('user_id', 'role_id');
    }
}
 

class Role extends Model
{
    protected $table = 'role';
    protected $primaryKey = 'id';

    public $timestamps = false;
    public $guarded = [];

    public function privileges()
    {
        return $this->belongsToMany('App\Model\Privilege', 'role_privilege', 'role_id', 'privilege_id')->withPivot(['role_id', 'privilege_id']);
    }
}

public function boot()
    {
        \View::composer('layout.slide', function($view) {
            $roles_id = User::find(session('user')['id'])->roles->map(function ($role) {
                return $role->id;
            });   // 使用map，最終得到的結果$roles_id = [1, 2, ...]
            $privileges = [];
            foreach ($roles_id as $role) {
                $privileges = array_merge($privileges, Role::find($role)->privileges->map(function ($privilege) {
                    return [$privilege->name, $privilege->route];
                })->toArray());
            }   // 得到的結果，$prpvileges = [['index/..', '列表']， ['', '']]
            $view->with('privileges', $privileges);
        });
    }

@foreach ($privileges as $privilege)
            @if ($privilege[1] == 'key/index' && $privilege[0] == '鍵名列表')
                <div class="slide__left__key" style="margin-top: 10px;"><a href="{{ url('key/index') }}"><span class="glyphicon glyphicon-th"></span> 鍵名列表</a></div>
            @endif

            @if ($privilege[1] == 'key/create' && $privilege[0] == '新增鍵名')
                    <div class="slide__left__key"><a href="{{ url('key/create') }}"><span class="glyphicon glyphicon-plus"></span> 新增鍵名</a></div>
            @endif

            @if ($privilege[1] == 'project/index' && $privilege[0] == '專案列表')
                    <div class="slide__left__key" style="margin-top: 20px;"><a href="{{ url('project/index') }}"><span class="glyphicon glyphicon-th-list"></span> 專案列表</a></div>
            @endif

            @if ($privilege[1] == 'project/create' && $privilege[0] == '新增專案')
                    <div class="slide__left__key"><a href="{{ url('project/create') }}"><span class="glyphicon glyphicon-edit"></span> 新增專案</a></div>
            @endif

            @if ($privilege[1] == 'user/index' && $privilege[0] == '使用者列表')
                    <div class="slide__left__key" style="margin-top: 20px;"><a href="{{ url('user/index') }}"><span class="glyphicon glyphicon-th-large"></span> 使用者列表</a></div>
            @endif

            @if ($privilege[1] == 'user/create' && $privilege[0] == '新增使用者')
                    <div class="slide__left__key"><a href="{{ url('user/create') }}"><span class="glyphicon glyphicon-plus-sign"></span> 新增使用者</a></div>
            @endif
        @endforeach