hlm_pl_mall/app/home/controller/Seccode.php

<?php

/**
 * 验证码
 *
 */

namespace app\home\controller;


use think\captcha\facade\Captcha;

/**
 
 * 
 
 * 
 * ----------------------------------------------------------------------------
 * 
 
 * 控制器
 */
class Seccode
{
    /**
     *产生验证码
     */
    public function makecode()
    {
        $config = [
            'fontSize' => 20, // // 验证码字体大小
            'length' => 4, // 验证码位数
            'useNoise' => false, //是否添加杂点
            'useCurve' => true,
            'imageH' => 50, //高度
            'imageW' => 150,
        ];
        config($config, 'captcha');
        $captcha = Captcha::create();
        return $captcha;
    }

    /**
     * AJAX验证
     */
    public function check()
    {
        $config = [];
        if (input('param.reset') == 'false') {
            //验证成功之后,验证码是否失效,验证成功后是否重置
            $config['reset'] = FALSE;
        }
        config($config, 'captcha');
        $code = input('param.captcha');
        if (captcha_check($code)) {
            exit('true');
        } else {
            exit('false');
        }
    }
}