tp5 of thinkPHP5 Framework captcha Verification Code Configuration and Verification Operation Example

This paper describes the configuration and verification operation of tp5 (thinkPHP5 framework) captcha verification code. Share it for your reference, as follows:

1-Installation

composer require topthink/think-captcha 1.* -vvv

2-Configuration file

'captcha' => [    //  Verification code character set 3.
  'codeSet' => '2345678abcdefhijkmnpqrstuvwxyzABCDEFGHJKLMNPQRTUVWXY',     //  Verification code font size (px)5.
  'fontSize' => 28,     //  Whether to draw confusion curve 7.
  'useCurve' => false,     //  Verification code picture height 9.
  'imageH'  => 50,    //  Verification code picture width 11.
  'imageW'  => 200,     //  Verification code number 13.
  'length'  => 4,     //  Reset after successful verification     15.
  'reset'  => true
  ],

3-html code

<div class="yzm">
  <img src="{:captcha_src()}" class="verify" onclick="resVerify()" alt=" Verification code " />
<a href="javascript:resVerify();" rel="external nofollow"  > Can't see clearly, change 1 Zhang </a>
</div>

Or

<img src="{:captcha_src()}" class="verify" 
onclick="javascript:this.src='{:captcha_src()}?rand='+Math.random()" >

4-Authentication at Logon Time of Controller

$captcha=input("captcha");
 // Validation 
if (!captcha_check($captcha)){
  exit(json_encode(array('status'=>0,'msg'=>' Verification code error ')));
}

Or

// Verification code verification code 
$captcha = new Captcha();
if (!$captcha->check(input("captcha"))){
  return $this->error(" Verification code error ");
}

Additional features and plug-ins can be found at: https://www.kancloud.cn/he_he/thinkphp5/787173

For more readers interested in thinkPHP related contents, please check the topics of this site: "ThinkPHP Introduction Tutorial", "thinkPHP Template Operation Skills Summary", "ThinkPHP Common Methods Summary", "codeigniter Introduction Tutorial", "CI (CodeIgniter) Framework Advanced Tutorial", "Zend FrameWork Framework Introduction Tutorial" and "PHP Template Technology Summary".

I hope this article is helpful to the PHP programming based on ThinkPHP framework.