core-bundle/src/Resources/contao/forms/FormCaptcha.php
protected function getQuestion()
	{
		$this->generateCaptcha();

		$question = $GLOBALS['TL_LANG']['SEC']['question' . random_int(1, 3)];
		$question = sprintf($question, $this->arrCaptcha['int1'], $this->arrCaptcha['int2']);

		$strEncoded = '';
		$arrCharacters = Utf8::str_split($question);

		foreach ($arrCharacters as $strCharacter)
		{
			$strEncoded .= sprintf('&#%s;', Utf8::ord($strCharacter));
		}

		return $strEncoded;
	}
protected function getQuestion()
	{
		$this->generateCaptcha();

		$question = $GLOBALS['TL_LANG']['SEC']['question' . random_int(1, 3)];
		$question = sprintf($question, $this->arrCaptcha['int1'], $this->arrCaptcha['int2']);

		$strEncoded = '';
		$arrCharacters = Utf8::str_split($question);

		foreach ($arrCharacters as $strCharacter)
		{
			$strEncoded .= sprintf('&#%s;', Utf8::ord($strCharacter));
		}

		return $strEncoded;
	}
Generate the captcha question

@return string The question string