dengbw
43 lines
1.2 KiB
PHP
43 lines
1.2 KiB
PHP
<?php
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defined('BASEPATH') OR exit('No direct script access allowed');
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require_once APPPATH . 'controllers/api/BaseController.php';
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/**
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* Notes:生成验证码
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* Created on: 2022/8/29 17:15
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* Created by: dengbw
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*/
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class Captcha extends BaseController
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{
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private $redis;
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public function __construct()
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{
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parent::__construct();
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$this->redis = &load_cache('redis');
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}
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public function index_get()
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{
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$this->load->library('MyCaptcha');
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$myCaptcha = new MyCaptcha();
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$re = $myCaptcha->create(5, ['width' => 16, 'height' => 20, 'pnum' => 50, 'base64' => 1]);
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$code_key = $this->generateSign();
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$this->redis->save($code_key, $re['text'], 5 * 60);
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$data = ['base64' => $re['base64'], 'code_key' => $code_key];
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$this->return_response($data);
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}
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function generateSign()
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{
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$sign = md5(mt_rand() . 'mycaptchamarket');
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// 拼接上签名作为 Redis 的 key
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$key = 'code_' . $sign;
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if ($this->redis->exists($key)) {
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// 如果生成的 Sign 已存在，就进行递归，直到生成出一个不存在的。
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return $this->generateSign();
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}
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return $key;
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}
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} |