clicaptcha

<input type="hidden" id="clicaptcha-submit-info" name="clicaptcha-submit-info">

$('#clicaptcha-submit-info').clickCaptcha({
    src: '../clicaptcha.php',
	success_tip: '验证成功！',
	error_tip: '未点中正确区域，请重试！',
	callback: function(){
		//...
	}
});

//后端进行二次验证
require('../clicaptcha.class.php');
$clicaptcha = new clicaptcha();
echo $clicaptcha->check($_POST['clicaptcha-submit-info']) ? '后端二次验证成功' : '后端二次验证失败';