php - 表单验证Codeigniter 4后无法保留输入值

Question

这是我之前看到过的一个问题，但我一直无法为新版本的 Codeigniter 找到答案。

控制器

<?php


namespace App\Controllers;


class SendEmail extends BaseController
{
    public function index($validation = NULL){
        // Load form helper
        helper('form');

        // Instantiate session
        $session = \Config\Services::session();

        // Set css, javascript, and flashdata
        $data = [
            'css' => array('contact.css'),
            'js' => array('contact.js'),
            'validation' => $validation,
            'success' => $session->get('success')
        ];

        // Show views
        echo view('templates/header', $data);
        echo view('contact', $data);
        echo view('templates/footer', $data);
    }
    public function sendEmail(){
        // Instantiate request
        $request = $this->request;

        // Captcha API
        $captchaUser = $request->getPost('g-recaptcha-response');
        // Captcha Key loaded from a file left out of the repo
        $captchaConfig = config('Config\\Credentials');
        $captchaKey = $captchaConfig->captchaKey;
        $captchaOptions = [
            'secret' => $captchaKey,
            'response' => $captchaUser
        ];
        $client = \Config\Services::curlrequest();
        $captchaResponse = $client->request('POST', 'https://www.google.com/recaptcha/api/siteverify', ['form_params' => $captchaOptions]);
        $captchaObj = json_decode($captchaResponse->getBody());

        // Load validation library
        $validation = \Config\Services::validation();

        // Set validation rules
        $validation->setRules([
            'name' => 'required|alpha_dash|alpha_space',
            'email' => 'required|valid_email',
            'subject' => 'required|alpha_numeric_punct',
            'message' => 'required|alpha_numeric_punct'
        ]);

        // Validate inputs
        if (!$this->validate($validation->getRules())){
            // Run index function to show the contact page again
            $this->index($this->validator);
        }
        // Validate captcha
        elseif(!$validation->check($captchaObj->success, 'required')){
            $validation->setError('captcha','Did not pass captcha. Please try again.');
            $this->index($validation->getErrors());
        }
        else{
            // Set variables to input
            $name = $request->getPost('name');
            $email = $request->getPost('email');
            $subject = $request->getPost('subject');
            $message = $request->getPost('message');

            // Load email class
            $emailC = \Config\Services::email();

            // Set email settings
            $emailC->setFrom('[e-mail]', $name);
            $emailC->setReplyTo($email);
            $emailC->setTo('[e-mail]');

            $emailC->setSubject($subject);
            $emailC->setMessage($message);

            // Testing section
            echo '<br>'.$name.'<br>'.$email.'<br>'.$subject.'<br>'.$message;

            /* Temporarily disabled for testing purposes
            // Send email
            if($emailC->send(false)){
                // Redirect
                return redirect()->to(base_url().'/contact')->with('success', true);
            }else{
                // Display error
                throw new \CodeIgniter\Database\Exceptions\DatabaseException();
            };
            */
        }
    }
}

联系人视图

<div class="container">
    <div class="row">
        <div class="col">
            <div class="alert alert-success align-center" id="message-alert" <?php if($success){echo 'style="display:block"';} ?>>Message successfully sent!</div>
        </div>
    </div>
    <div class="row justify-content-center">
        <div class="col-md-6">
            <?php echo form_open('send_email', ['id'=>'contactForm'])?>
                <div class="form-group">
                    <label for="name">Name</label>
                    <input name="name" type="text" class="form-control" id="name" aria-describedby="name" placeholder="Name" required>
                    <p class="invalid"><?php if(isset($validation)&&$validation->hasError('name')){echo $validation->getError('name');}?></p>
                </div>
                <div class="form-group">
                    <label for="email">E-Mail</label>
                    <input name="email" type="email" class="form-control" id="email" aria-describedby="email" placeholder="E-mail" required>
                    <small id="emailHelp" class="form-text">I'll never share your email with anyone else.</small>
                    <?php //echo $validation->email;?>
                    <p class="invalid"><?php if(isset($validation)&&$validation->hasError('email')){echo $validation->getError('email');}?></p>
                </div>
                <div class="form-group">
                    <label for="subject">Subject</label>
                    <input name="subject" type="text" class="form-control" id="subject" placeholder="Subject" required>
                    <p class="invalid"><?php if(isset($validation)&&$validation->hasError('subject')){echo $validation->getError('subject');}?></p>
                </div>
                <div class="form-group">
                    <label for="message">Message</label>
                    <textarea name="message" rows="5" class="form-control" id="message" placeholder="Type your message here." required></textarea>
                    <p class="invalid"><?php if(isset($validation)&&$validation->hasError('message')){echo $validation->getError('message');}?></p>
                </div>
                <button id="submitButton" type="submit" class="btn btn-primary g-recaptcha" data-sitekey="6Ldf07AZAAAAAAflQCaJcWgGFCWevCswpIrm0mJN" data-callback='onSubmit' data-action='submit'>Submit</button>
            <p class="invalid"><?php if(isset($validation)&&$validation->hasError('captcha')){echo $validation->getError('captcha');}?></p>
            <?php echo form_close()?>
        </div>
    </div>
</div>
<script>
    function onSubmit(token) {
        document.getElementById("contactForm").submit();
    }
</script>
<script src="https://www.google.com/recaptcha/api.js"></script>

根据我对过去在 CodeIgniter 中的验证方式的理解，当您在表单验证后加载视图时，它会使用之前输入的内容更新值。CodeIgniter 4 似乎并非如此。我也尝试过直接加载视图，而不是在验证失败时调用 index 函数。仍然不会填写表单值。

现在我可以通过 $data 数组将这些值传递给索引函数。这是我现在要使用的修复程序。这更像是一个健全性检查，看看我是否缺少一些基本的东西，或者我是否错误地使用了 CodeIgniter 4 的验证格式。

标签： phpcodeigniter

Answer 1

在 CI4 中，您可以使用 old() 函数在表单验证时保留输入值：

查看文件：

<input type="tel" name="phone" value="<?= old('phone'); ?>">

在 Controller 中，您必须在 redirect() 代码中使用 withInput()：

$validation =  \Config\Services::validation();
$request = \Config\Services::request();

// your input validation rules
$validation->setRules(...)

if($request->getMethod() == "post" && ! $validation->withRequest($request)->run()) {
    return redirect()->back()->withInput()->with('error', $this->validation->getErrors());
    } else {
    // form validation success
}