我正在使用codeIgniter 2.2.2。 在Controller中我捕获了输入，以便在验证失败的情况下将其传递回视图，这样用户就不会被迫从开始填充所有字段，我通过$ data array设置以下变量
$data['fullname'] = $this->input->post('fullName');
但是当用户首先访问表单时，它会给出如下错误。
A PHP Error was encountered
Severity: Notice
Message: Undefined variable: fullname
如果我在视图中直接使用$this->input->post('fullName');而不是触发错误，但我想从Controller传递它。
第二个问题是当我将此输入的表单验证规则设置为$this->form_validation->set_rules('fullName', 'Full Name', 'required|alpha');时，验证规则alpha甚至不允许在这种情况下我需要的空格，因为表单字段是全名，必须有一个空间，例如，＆＃34;阿尔伯特爱因斯坦＆＃34;。
我可以通过将两个不同的表单输入字段设置为＆＃34; First Name＆＃34;来解决这个问题。和＃34;姓氏＆＃34;，但我不喜欢这样，因为我认为一个框架应该让我的生活更轻松而不是更难。
这是一个示例代码示例，它将触发我说的错误。 Example Gist
答案 0 :(得分：2)
试试这个。
public function contact() {
$this->load->library("session");
$data['message'] = $this->session->flashdata("message");
$data['fullname'] = $this->session->flashdata("fullname");
$this->load->view('site_header');
$this->load->view('site_nav');
$this->load->view('content_contact', $data);
$this->load->view('site_footer');
}
public function send_email() {
$this->load->library('form_validation');
$this->form_validation->set_rules('fullName', 'Full Name', 'required|callback_fullname_check');
$this->form_validation->set_rules('email', 'Email Address', 'required|valid_email');
$this->form_validation->set_rules('message', 'Message', 'required');
if ($this->form_validation->run() == false) {
$this->session->set_flashdata("message", validation_errors());
$this->session->set_flashdata("fullname", $this->input->post('fullName'));
} else {
$this->session->set_flashdata("message", "The email has successfully been sent!");
}
redirect("site/contact");
}
public function fullname_check($str) {
if (! preg_match("/^([a-z0-9 ])+$/i", $str)) {
$this->form_validation->set_message('fullname_check', 'The %s field can only be alpha numeric');
return FALSE;
} else {
return TRUE;
}
}
请避免重复加载视图 DRY （不要重复自己）
修改
尝试使用自定义验证规则来实现带空格的字母数字字符串。
希望它对你有用。
答案 1 :(得分：1)
您错过了表单成功部分的$data['fullname'] = ""，但是您尝试将代码加倍，尽可能让它更精益。
我该怎么做。
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Contact extends CI_Controller {
public function index() {
$this->load->library('form_validation');
// Double check spelling of set rules make sure matches the input on the view name="" area
$this->form_validation->set_rules('fullname', 'Full Name', 'required'); // Removed |alpha no need I think
$this->form_validation->set_rules('email', 'Email Address', 'required|valid_email');
$this->form_validation->set_rules('message', 'Message', 'required');
$fullname = $this->input->post('fullname');
if (isset($fullname)) {
$data['fullname'] = $fullname;
} else {
$data['fullname'] = "";
}
$data['message'] = "";
if ($this->form_validation->run() == false) {
$this->load->view('site_header');
$this->load->view('site_nav');
$this->load->view('content_contact', $data);
$this->load->view('site_footer');
} else {
$data['message'] = "The email has successfully been sent!";
$this->load->view('site_header');
$this->load->view('site_nav');
$this->load->view('content_contact', $data);
$this->load->view('site_footer');
}
}
}
查看：注意可能需要设置一些路线。
<form action="<?php echo base_url('contact');?>" method="post">
<input type="text" name="fullname" value="<?php echo $fullname;?>" placeholder=""/>
</form>
您的代码
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Site extends CI_Controller {
public function contact() {
$data['message'] = '';
$this->load->view('site_header');
$this->load->view('site_nav');
$this->load->view('content_contact', $data);
$this->load->view('site_footer');
}
public function send_email() {
$this->load->library('form_validation');
$this->form_validation->set_rules('fullName', 'Full Name', 'required|alpha');
$this->form_validation->set_rules('email', 'Email Address', 'required|valid_email');
$this->form_validation->set_rules('message', 'Message', 'required');
if ($this->form_validation->run() == false) {
$data['message'] = '';
$data['fullname'] = $this->input->post('fullName');
$this->load->view('site_header');
$this->load->view('site_nav');
$this->load->view('content_contact', $data);
$this->load->view('site_footer');
} else {
$data['fullname'] = "";
$data['message'] = 'The email has successfully been sent!';
$this->load->view('site_header');
$this->load->view('site_nav');
$this->load->view('content_contact', $data);
$this->load->view('site_footer');
}
}
}
答案 2 :(得分：0)
经过很长一段时间，我遇到了这个问题（我自己的问题）。当我开始学习CodeIgniter时，我问了这个问题。
我在问题中询问了两件事，以下是这两个（当时）问题的最佳答案。
value="<?= set_value('fieldName') ?>"，以防表单未成功提交并且您想要保存用户从填写表格字段再次。当我今天看到它时，我使用的代码看起来很奇怪，它违背了最佳实践。请看Quora关于how to better manage views in CodeIgniter的答案。
答案 3 :(得分：0)
<!-- form validation -->
<!-- form validation controller-->
class Securities_Controller extends CI_Controller {
/**
* load the add security page
*/
public function index() {
$this->load->model('securities/Security_Model');
$data['security'] = $this->Security_Model->get_new();
$this->load->view('securites_view/index', $data);
}
public function add() {
echo 'add';
$this->load->model('securities/Security_Model');
$data['security'] = $this->Security_Model->get_new(); //create empty fields
$rules = $this->Security_Model->rules;
$this->form_validation->set_rules($rules);
if ($this->form_validation->run() == TRUE) {
}
$this->load->view('securites_view/index', $data);
}
}
<!-- //form validation controller-->
<!-- form validation model-->
class Security_Model extends CI_Model {
//put your code here
function __construct() {
parent::__construct();
}
//validation rules
public $rules = array(
'cdsaccid' => array(
'field' => 'cdsaccid',
'label' => 'CDS Account',
'rules' => 'trim|required'
),
'comid' => array(
'field' => 'comid',
'label' => 'Company Name',
'rules' => 'trim|required'
)
);
//the standered class for security
function get_new() {
$Security = new stdClass();
$Security->cdsaccid = '';
$Security->comid = '';
return $Security;
}
public function array_from_post($fields) {
$data = array();
foreach ($fields as $field) {
$data[$field] = $this->input->post($field);
}
return $data;
}
}
<!-- //form validation model-->
<!-- form validation view-->
<?php echo form_open('Securities_Controller/add') ?>
<?php echo validation_errors();?>
<div class="form-group">
<label for="exampleInputEmail1">CDS Acc</label>
<input type="text" name="cdsaccid" class="form-control" value="<?=set_value('cdsaccid', $security->cdsaccid);?>" >
</div>
<div class="form-group">
<label for="exampleInputPassword1">Company</label>
<input type="text" name="comid" class="form-control" id="exampleInputPassword1">
</div>
<button type="submit" class="btn btn-default">Submit</button>
<?php echo form_close() ?>
<!-- //form validation view-->
<!-- //form validation -->