Captcha Component
Project address: https://github.com/webman-php/captcha
Installation
composer require webman/captchaUsage
Create the file app/controller/LoginController.php
<?php
namespace app\controller;
use support\Request;
use Webman\Captcha\CaptchaBuilder;
class LoginController
{
/**
* Test page
*/
public function index(Request $request)
{
return view('login/index');
}
/**
* Output captcha image
*/
public function captcha(Request $request)
{
// Initialize the captcha class
$builder = new CaptchaBuilder;
// Generate captcha
$builder->build();
// Store the captcha value in the session
$request->session()->set('captcha', strtolower($builder->getPhrase()));
// Get the binary data of the captcha image
$img_content = $builder->get();
// Output the captcha binary data
return response($img_content, 200, ['Content-Type' => 'image/jpeg']);
}
/**
* Check captcha
*/
public function check(Request $request)
{
// Get the captcha field from the post request
$captcha = $request->post('captcha');
// Compare with the captcha value in the session
if (strtolower($captcha) !== $request->session()->get('captcha')) {
return json(['code' => 400, 'msg' => 'The captcha you entered is incorrect']);
}
return json(['code' => 0, 'msg' => 'ok']);
}
}Create the template file app/view/login/index.html
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Captcha Test</title>
</head>
<body>
<form method="post" action="/login/check">
<img src="/login/captcha" /><br>
<input type="text" name="captcha" />
<input type="submit" value="Submit" />
</form>
</body>
</html>Visit the page http://127.0.0.1:8787/login, the interface is similar to the following:
Common Parameter Settings
/**
* Output captcha image
*/
public function captcha(Request $request)
{
$builder = new PhraseBuilder(4, 'abcdefghjkmnpqrstuvwxyzABCDEFGHJKMNPQRSTUVWXYZ');
$captcha = new Captcha(null, $builder);
$captcha->build();
$request->session()->set('join', strtolower($captcha->getPhrase()));
$img_content = $captcha->get();
return response($img_content, 200, ['Content-Type' => 'image/jpeg']);
}For more interfaces and parameters, refer to https://github.com/webman-php/captcha