dongxuan2577 2014-12-12 19:15
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如何在表单提交上验证Google reCaptcha

Recently, Google completely overhauled their reCaptcha API and simplified it to a single checkbox.

reCaptcha

The problem is, I can submit a form with the reCaptcha included without checking it and the form will ignore the reCaptcha.

Before you had to send the form to a PHP file with the private key et al, but I'm not seeing any mention of that in their Developer's Guide. I have no idea how to validate the form to be sure the new reCaptcha was filled by the user.

Am I missing something? Is that PHP file with the private key still required?

All I have for the reCaptcha so far is:

<div data-type="image" class="g-recaptcha" data-sitekey="My Public Key"></div>
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  • douzhang2092 2014-12-15 09:03
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    If you want to check if the User clicked on the I'm not a robot checkbox, you can use the .getResponse() function provided by the reCaptcha API.

    It will return an empty string in case the User did not validate himself, something like this:

    if (grecaptcha.getResponse() == ""){
        alert("You can't proceed!");
    } else {
        alert("Thank you");
    }
    

    In case the User has validated himself, the response will be a very long string.

    More about the API can be found on this page: reCaptcha Javascript API

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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