tp5(thinkPHP5框架)captcha验证码配置及验证操作示例

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

'captcha' => [    // 验证码字符集合3.  'codeSet' => '2345678abcdefhijkmnpqrstuvwxyzABCDEFGHJKLMNPQRTUVWXY',     // 验证码字体大小(px)5.  'fontSize' => 28,     // 是否画混淆曲线7.  'useCurve' => false,     // 验证码图片高度9.  'imageH'  => 50,    // 验证码图片宽度11.  'imageW'  => 200,     // 验证码位数13.  'length'  => 4,     // 验证成功后是否重置    15.  'reset'  => true  ],

<div class="yzm">  <img src="{:captcha_src()}" class="verify" onclick="resVerify()" >看不清，换一张</a></div>

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

$captcha=input("captcha"); //验证if (!captcha_check($captcha)){  exit(json_encode(array('status'=>0,'msg'=>'验证码错误')));}

//验证码验证码$captcha = new Captcha();if (!$captcha->check(input("captcha"))){  return $this->error("验证码错误");}