时间：2022-05-04 11:25:17 | 栏目：PHP代码 | 点击：次
最近需要用到验证码，搜索了很多关于Yii2验证码的切换的介绍,下面我来记录一下,有需要了解Yii2下验证码的切换的朋友可参考。希望此文章对各位有所帮助。
模型代码如下：
<?php
namespace app\admin\models;
use yii;
use yii\base\model;
use yii\captcha\Captcha;
class LoginForm extends Model{
public $verifyCode;
public $password;
public $username;
public function rules(){
return [
['verifyCode','captcha','captchaAction'=>'/admin/login/captcha','message'=>'{attribute}'],
[['password','username'],'required'],
];
}
}
控制器代码如下：
<?php
namespace app\admin\controllers;
use Yii;
use yii\web\Controller;
use app\admin\models\LoginForm;
use yii\filters\AccessControl;
use yii\filters\VerbFilter;
use yii\captcha\CaptchaAction;
class LoginController extends Controller{
public function actions(){
return [
'captcha'=>'yii\captcha\CaptchaAction',
'maxLength'=>4,
'minLength'=>3,
'width'=>10,
'height'=>10
];
}
public function actionIndex(){
$log = new LoginForm();
return $this->renderPartial("index",['model'=>$log]);
}
//授权规则
｝
视图代码如下：
<?php
use yii\helpers\Html;
use yii\bootstrap\Nav;
use yii\bootstrap\NavBar;
use yii\widgets\Breadcrumbs;
use app\assets\AppAsset;
use yii\widgets\ActiveFiel;
use yii\widgets\ActiveForm;
use yii\captcha\Captcha;
use app\components\HelloWidget;
//url 创建
use yii\helpers\Url;
AppAsset::register($this);
?>
<?php $this->beginPage()?>
<!DOCTYPE html>
<html>
<head>
<title>博客后台管理系统</title>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
<?=Html::cssFile('@web/css/bootstrap.min.css')?>
<?=Html::cssFile('@web/css/style.css')?>
<?=Html::jsFile("@web/js/jquery-1.11.3.min.js");?>
<?=Html::jsFile("@web/js/bootstrap.min.js");?>
<?php ?>
</head>
<?php $this->beginBody()?>
<body>
<div class="login-box">
<div class="login">
<div class="login-icon">
</div>
<h4 class="login-title">博客后台管理系统</h4>
<?php $form=ActiveForm::begin(['method'=>'post','action'=> \Yii::$app->urlManager->createUrl('/admin/login/index')])?>
<div class="login-input-box mb10">
<input type="text" class="form-control" name="username" placeholder="用户名">
</div>
<div class="login-input-box mb10">
<input class="form-control" type="password" name="password" placeholder="密码">
</div>
<div class="login-input-box mb30">
<input class="form-control" type="text" name="code" placeholder="验证码">
<span class="login-code">
<img id="code_img" src="<?= Url::toRoute('/admin/login/captcha')?>" title="点击刷新验证码" onClick="get_code(this);">
</span>
</div>
<input class="inputbtn bg-success btn-block" type="submit" value="登 录">
<?php ActiveForm::end();?>
</div>
</div>
<script type="text/javascript">
//刷新验证码
function get_code(obj)
{
if(!obj)
{
obj = document.getElementById('code_img');
}
obj.src = obj.src + "&t="+Date.parse(new Date());
}
</script>
</body>
<?php $this->beginBody()?>
</html>
<?php $this->endPage()?>
这里整个代码差不多了但是要设置一样更重要的 app/vendor/yiisoft/yii2/captcha/的文件下的CaptchaAction.php这文件中修改getVerifyCode($regenerate = false) 的方法$regenerate参数为true （getVerifyCode($regenerate = true)）