关于 in_array () expects parameter 2 to be array, object given

很多时候都会报这个错误，解决方法就是看你的视图与控制器中的方法是否吻合！

举个例子吧：

控制器：

public function edit($id)
    {
        $user = $this->user->find($id);
        $roles = $this->role->all();roles();
        return view('users.edit', compact('user', 'roles', 'userRoles'));
    }

视图(会报标题错误)：X

<div class="form-group">
        @foreach($roles as $role)
           X <?php $checked = in_array($role->id, $userRoles->lists('id')); ?>
            <div class="checkbox">
                <label>
                    {!! Form::checkbox('role[]', $role->id, $checked) !!} {{ $role->display_name }}
                </label>
            </div>
        @endforeach
    </div>

正确的视图：

<div class="form-group">
        @foreach($roles as $role)
            修改-><?php $checked = in_array($role->id, $userRoles->lists('id')->all()); ?>
            <div class="checkbox">
                <label>
                    {!! Form::checkbox('role[]', $role->id, $checked) !!} {{ $role->display_name }}
                </label>
            </div>
        @endforeach
    </div>