1、首先确认文件夹\vendor\topthink\think-captcha存在
2、显示验证码的方法,我这里是写在:\application\admin\controller\Login.php
//显示验证码
public function show_captcha(){
$captcha = new \think\captcha\Captcha();
$captcha->imageW=121;
$captcha->imageH = 32; //图片高
$captcha->fontSize =14; //字体大小
$captcha->length = 4; //字符数
$captcha->fontttf = '5.ttf'; //字体
$captcha->expire = 30; //有效期
$captcha->useNoise = false; //不添加杂点
return $captcha->entry();
}
3、模板文件\application\admin\view\Login\index.html中这样引用验证码
<form action="/login/login_post" method="post">
<input type="text" class="input" name="captcha" placeholder="填写右侧的验证码" data-validate="required:请填写右侧的验证码" style="width: 200px;"/>
<img src="/login/show_captcha" alt="" width="121" height="32" class="passcode" onclick="this.src=this.src+'?'"/>
4、同控制器中login_post方法
//提交
public function login_post(){
$code=input('post.captcha');
$captcha = new \think\captcha\Captcha();
$result=$captcha->check($code);
if($result===false){
echo '验证码错误';exit;
}
echo '验证码正确,继续';exit;
}
