A must see! Reasons and solutions for TP6 verification code verification failure

First use Composer to install the think-captcha extension package:

composer require topthink/think-captcha

Controller introduction

use think\captcha\facade\Captcha;

Generate verification code

public function verify()
{
    return Captcha::create();
}

Verify verification code

if( !Captcha::check($vercode)) {
    return json(['code'=>1001, 'msg'=>'验证码错误');
}

Check method

/**
 * 验证验证码是否正确
 * @access public
 * @param string $code 用户验证码
 * @return bool 用户验证码是否正确
 */
public function check(string $code): bool
{
    if (!$this->session->has('captcha')) {
        return false;
    }

    $key = $this->session->get('captcha.key');

    $code = mb_strtolower($code, 'UTF-8');

    $res = password_verify($code, $key);

    if ($res) {
        $this->session->delete('captcha');
    }

    return $res;
}

It can be seen from the above check method that verification code verification requires session, and Thinkphp6 is not enabled by default. It needs to be initialized according to the manual.

Find the global middle in the application app directory File middleware.php, just turn on the code commented below\think\middleware\SessionInit::class

// 全局中间件定义文件
return [
    // 全局请求缓存
    // \think\middleware\CheckRequestCache::class,
    // 多语言加载
    // \think\middleware\LoadLangPack::class,
    // Session初始化
     \think\middleware\SessionInit::class
];

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