OracleSqlHelper::forSql

function forSql($value, $maxLength = 0)
{
	if ($maxLength <= 0 || $maxLength > 2000)
		$maxLength = 2000;

	$value = mb_substr($value, 0, $maxLength);

	if (BitrixMainApplication::isUtfMode())
	{
		// From http://w3.org/International/questions/qa-forms-utf-8.html
		// This one can crash php with segmentation fault on large input data (over 20K)
		// https://bugs.php.net/bug.php?id=60423
		if (preg_match_all('%(
			[x00-x7E]                        # ASCII
			|[xC2-xDF][x80-xBF]            # non-overlong 2-byte
			|xE0[xA0-xBF][x80-xBF]        # excluding overlongs
			|[xE1-xECxEExEF][x80-xBF]{2} # straight 3-byte
			|xED[x80-x9F][x80-xBF]        # excluding surrogates
			|xF0[x90-xBF][x80-xBF]{2}     # planes 1-3
			|[xF1-xF3][x80-xBF]{3}         # planes 4-15
			|xF4[x80-x8F][x80-xBF]{2}     # plane 16
		)+%x', $value, $match))
			$value = implode(' ', $match[0]);
		else
			return ''; //There is no valid utf at all
	}

	return str_replace("'", "''", $value);
}