laravel 验证码

控制器

<?php

namespace App\Http\Controllers\Index;
use Illuminate\Http\Request;
use App\Http\Requests;
use App\Http\Controllers\Controller;
use DB;
use Gregwar\Captcha\CaptchaBuilder;
use Illuminate\Support\Facades\Input;
use Session;
class RegisterController extends Controller
{
    /*生成验证码*/
    public function captcha()
    {
        //生成验证码图片的Builder对象，配置相应属性
        $builder = new CaptchaBuilder;
        //dd($builder);
        //可以设置图片宽高及字体
        $builder->build($width = 100, $height = 40, $font = null);
        //获取验证码的内容
        $phrase = $builder->getPhrase();
        //把内容存入session
        Session::put('milkcaptcha', $phrase);
        //生成图片
        header("Cache-Control: no-cache, must-revalidate");
        header('Content-Type: image/jpeg');
        $builder->output();
    }

}

视图层

<div class="yzm">
<input type="text" name="yan" placeholder="验证码">
<span>
<img src="{{url('index/captcha/1')}}" alt="验证码" style="height: 100px; height: 40px;" class="yanzhengma" id="c2c98f0de5a04167a9e427d883690ff6">
</span>
</div>
<script>
/*生成验证码*/
$(function(){
    $("input[name=captcha]").blur(function () {
    var captcha=$(this).val();
    if(captcha=='')
    {
    alert('验证码不能为空');
    return;
    }
    })
    $('.yanzhengma').click(function () {
    var _this=$(this);
    var url="{{url('index/captcha')}}";
    var url=url+'/'+Math.random();
    document.getElementById('c2c98f0de5a04167a9e427d883690ff6').src=url;
    })
})
</script>