Laravel框架验证码类用法实例分析

"require": {
...
"gregwar/captcha": "1."
},

poser update

<?php
$builder->save('out.jpg');

header('Content-type: image/jpeg');
$builder->output();

<img src="<?php echo $builder->inline(); ?>" />

<?php
namespace App\Http\Controllers;
use App\Http\Requests;
use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
//引用对应的命名空间
use Gregwar\Captcha\CaptchaBuilder;
use Session;
class KitController extends Controller {
  /
    Display a listing of the resource.
   
    @return Response
   /
  public function captcha($tmp)
  {
    //生成验证码图片的Builder对象，配置相应属性
    $builder = new CaptchaBuilder;
    //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::flash('milkcaptcha', $phrase);
    //生成图片
    header("Cache-Control: no-cache, must-revalidate");
    header('Content-Type: image/jpeg');
    $builder->output();
  }
}

Route::get('kit/captcha/{tmp}', 'KitController@captcha');

<input type="text" name="captcha" class="form-control" style="width: 300px;">
<a onclick="javascript:re_captcha();" ><img src="{{ URL('kit/captcha/1') }}" alt="验证码" title="刷新图片" width="100" height="40" id="c2c98f0de5a04167a9e427d883690ff6" border="0"></a>
<script>
 function re_captcha() {
  $url = "{{ URL('kit/captcha') }}";
    $url = $url + "/" + Math.random();
    document.getElementById('c2c98f0de5a04167a9e427d883690ff6').src=$url;
 }
</script>

$userInput = $request->get('captcha');
if($builder->testPhrase($userInput)) {
  //用户输入验证码正确
  return '您输入验证码正确';
} else {
  //用户输入验证码错误
  return '您输入验证码错误';
}

public function testPhrase($phrase)
{
 return ($this->builder->niceize($phrase) == $this->builder->niceize($this->getPhrase()));
}

$userInput = \Request::get('captcha');
if (Session::get('milkcaptcha') == $userInput) {
  //用户输入验证码正确
  return '您输入验证码正确';
} else {
  //用户输入验证码错误
  return '您输入验证码错误';
}