我一直试图让这个验证码工作了一段时间，但我不能让它工作，无论我试图做什么。
当我改变！==到只是！=有人建议，当我按下表单的“提交”按钮时，表单提交将以“真”响应进行，即使按下reCAPTCHA框或忽略按下它。var_dump（$responseKeys）的输出总是给我一个“空”值，所以我不能找出什么是错的。
有人知道为什么它不工作吗？

菲律宾

if (isset($_POST)) {
    $captcha      = $_POST['g-recaptcha-response'];
    $ip           = $_SERVER['REMOTE_ADDR'];
    $secretkey    = 'SECRET KEY';
    $response     = file_get_contents('https://www.google.com/recaptcha/api/siteverify?secret=' . $secretkey . '&response=' . $captcha . '&remoteip=' . $ip);
    $responseKeys = json_decode($response, true);

    if (intval($responseKeys['success']) != 1) {
        //echo 'TRUE';
        //echo "<br>";
        //echo var_dump($responseKeys)."<br>";
        //exit;
    } else {
        //echo 'FALSE';
        //echo "<br>";
        //echo var_dump($responseKeys)."<br>";
        // exit;
    }
}

超文本标记语言

<div class="span9 page_sidebar registerForm">
    <?php
    if (isErrors())
    {
        echo outputErrors();
    }
    ?>
    <div class="well">
        <p>
            <?php echo t('register_intro_text', 'Please enter your information below to register for an account. Your new account password will be sent to your email address.'); ?>
        </p>
        <form id="regerform" method="post" action="https://<?php echo _CONFIG_SITE_FULL_URL; ?>/register.<?php echo SITE_CONFIG_PAGE_EXTENSION; ?>" class="form">
            <div class="third">
                <label for="title">
                    <?php echo t("title", "title"); ?>:
                </label>
                <select autofocus="autofocus" tabindex="1" id="title" name="title">
                    <option value="Mr"><?php echo t('title_mr', 'Mr'); ?></option>
                    <option value="Mrs"><?php echo t('title_mrs', 'Mrs'); ?></option>
                    <option value="Miss"><?php echo t('title_miss', 'Miss'); ?></option>
                    <option value="Dr"><?php echo t('title_dr', 'Dr'); ?></option>
                    <option value="Pro"><?php echo t('title_pro', 'Pro'); ?></option>
                </select>
            </div>
            <div class="third">
                <label for="firstname">
                    <?php echo t("firstname", "firstname"); ?>:
                </label>
                <input type="text" tabindex="1" value="<?php echo isset($firstname) ? safeOutputToScreen($firstname) : ''; ?>" id="firstname" name="firstname">
            </div>
            <div class="thirdLast">
                <label for="lastname">
                    <?php echo t("lastname", "lastname"); ?>:
                </label>
                <input type="text" tabindex="1" value="<?php echo isset($lastname) ? safeOutputToScreen($lastname) : ''; ?>" id="lastname" name="lastname">
            </div>
            <div class="clear"></div>
            <div>
                <label for="emailAddress">
                    <?php echo t("email_address", "email address"); ?>:
                </label>
                <input type="text" tabindex="1" value="<?php echo isset($emailAddress) ? safeOutputToScreen($emailAddress) : ''; ?>" id="emailAddress" name="emailAddress">
            </div>
            <div>
                <label for="emailAddressConfirm">
                    <?php echo t("email_address_confirm", "Email Confirm"); ?>:
                </label>
                <input type="text" tabindex="2" value="<?php echo isset($emailAddressConfirm) ? safeOutputToScreen($emailAddressConfirm) : ''; ?>" id="emailAddressConfirm" name="emailAddressConfirm">
            </div>
            <div class="thirdLast">
                <label for="username">
                    <?php echo t("username", "username"); ?>:
                </label>
                <input type="text" tabindex="3" value="<?php echo isset($username) ? safeOutputToScreen($username) : ''; ?>" id="username" name="username">
            </div>
            <div class="clear"></div>
            
            <?php if(SITE_CONFIG_REGISTER_FORM_SHOW_CAPTCHA == 'yes'): ?>
                <div class="g-recaptcha" data-sitekey="PRIVATE KEY"></div>
            <?php endif; ?>
            
            <div class="buttonWrapper">
                <button type="submit" name="submit" class="btn btn-primary" tabindex="99"><?php echo t("register", "register"); ?></button>
            </div>
            
            <input type="hidden" value="1" name="submitme"/>
        </form>
    
        <div class="disclaimer">
            <?php echo t('by_clicking_register_you_agree_to_our_terms', 'By clicking \'register\', you agree to our <a href="terms.[[[SITE_CONFIG_PAGE_EXTENSION]]]" target="_blank">terms</a>.', array('SITE_CONFIG_PAGE_EXTENSION'=>SITE_CONFIG_PAGE_EXTENSION)); ?>
        </div>
        <div class="clear"></div>
    </div>
</div>