Simple implementation method of thinkPHP5.0 framework verification code call and click picture refresh

This paper describes the implementation method of thinkPHP5.0 framework verification code call and click picture refresh. Share it for your reference, as follows:

1. Add verification code configuration to the configuration file

'captcha' => [
    //  Verification code character set 
    'codeSet' => '23456789',
    //  Verification code font size (px)
    'fontSize' => 25,
    //  Whether to draw confusion curve 
    'useCurve' => false,
    //  Verification code number 
    'length'  => 4,
    //  Reset after successful verification 
    'reset'  => true
],

2. The back-end verification code method is written

public function check($code='')
{
  if (!captcha_check($code)) {
    $this->error(' Verification code error ');
  } else {
    return true;
  }
}

3. The front end calls the verification code and sets the onclick attribute. Click the picture to refresh the verification code

<div>
  <span><strong> Please enter the verification code </strong></span>
  <input display: inline;" class="form-control" name="code" type="text" required="required">
  <img src="{:captcha_src()}" onclick="this.src='{:captcha_src()}?'+Math.random();"/>
</div>

Readers who are interested in thinkPHP can 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 PHP programming based on ThinkPHP framework.