php – Codeigniter validation_errors()总是返回空

每当任何验证规则被破坏时,页面都不显示错误输出,当没有任何错误输出被破坏时,表单按预期进行.

这是我的控制器功能

public function add()
{

    $this->load->library('form_validation');
    $this->load->library('layout');
    // field name,error message,validation rules
    $this->form_validation->set_rules('type','Type','required|xss_clean');
    $this->form_validation->set_rules('title_type','Title type','required|xss_clean');
    $this->form_validation->set_rules('first_name','First name','trim|required|min_length[1]|max_length[150]|xss_clean');
    $this->form_validation->set_rules('surname','Surname','trim|required|min_length[1]|max_length[150]|xss_clean');
    $this->form_validation->set_rules('job_title','Job title','trim|min_length[5]|max_length[300]required|xss_clean');
    $this->form_validation->set_rules('office_number','Office number','trim|min_length[2]|max_length[11]|xss_clean');
    $this->form_validation->set_rules('telephone','Telephone','trim|numeric|xss_clean');
    $this->form_validation->set_rules('email','Email','trim|valid_email|xss_clean');
    $this->form_validation->set_rules('website','Website','trim|prep_url|xss_clean');
    $this->form_validation->set_rules('background','Background','trim|xss_clean');


    $data = array(
        'title' => 'Add staff member'
    );

    if ($this->form_validation->run() == FALSE) { //Was errors

        $this->session->set_flashdata('message','You missed some details,please try again.');

        $this->layout->load('default','add_person',$data);
    } else {
        $this->people_model->add_person();
        $this->layout->load('default','added_person',$data);
    }


} //add

在我的形式视图中,我有

<?php echo validation_errors('<p class="msg msg-error">') ?>

任何人都可以看到我做错了什么,我已经尝试了我能想到的一切.

验证validation_errors()的var_dump给出

string '' (length=0)

编辑：奇怪的是,如果我交换这两行,我得到：

$this->load->library('form_validation');
    $this->load->library('layout'); //lib code http://pastebin.com/K1rBV512

Message: Undefined property: People::$form_validation

Filename: controllers/people.php

Line Number: 27