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Captcha

Client Integration (Template/Content)

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<form>
...
<label>[[TXT_MODULE_CAPTCHA]]</label>
[[MODULE_CAPTCHA_CODE]]
...
</form>

Server Integration (PHP)

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$this->objTemplate->setVariable(array(
    'TXT_MODULE_CAPTCHA'   => $_CORELANG['TXT_CORE_CAPTCHA'],
    'MODULE_CAPTCHA_CODE'  => \Cx\Core_Modules\Captcha\Controller\Captcha::getInstance()->getCode(),
));

Validation

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if (!\Cx\Core_Modules\Captcha\Controller\Captcha::getInstance()->check()) {
    throw new Exception('Invalid Captcha');
}

Older Contrexx Versions (<3.0)

Client-Side (Template/Content) 

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<form>
...
<img src="[[CONTACT_CAPTCHA_URL]]" />
<input type="text" name="modulenameFormCaptcha"/>
...
</form>

Server-Side (PHP) 

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include_once ASCMS_LIBRARY_PATH.'/spamprotection/captcha.class.php';
$objCaptcha = new Captcha();
$this->_objTpl->setVariable('CONTACT_CAPTCHA_URL', $objCaptcha->getUrl());

Validation 

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if (!$objCaptcha->check($_POST['modulenameFormCaptcha'])) {
    throw new Exception($_ARRAYLANG['TXT_CORE_INVALID_CAPTCHA');

}