CsvFile::put

public function put(array $fields): bool
{
	$length = false;
	$throw32KWarning = false;
	if ($this->fieldsType == self::FIELDS_TYPE_WITH_DELIMITER)
	{
		$content = '';
		for ($i = 0, $n = count($fields); $i < $n; $i++)
		{
			if ($i>0)
			{
				$content .= $this->fieldDelimiter;
			}
			//$pos1 = strpos($fields[$i], $this->fieldDelimiter);
			//$pos2 = $pos1 || strpos($fields[$i], """);
			//$pos3 = $pos2 || strpos($fields[$i], "n");
			//$pos4 = $pos3 || strpos($fields[$i], "r");
			//if ($pos1 !== false || $pos2 !== false || $pos3 !== false || $pos4 !== false)
			if ($fields[$i] === null)
			{
				$fields[$i] = '';
			}
			elseif (preg_match("#["nr]+#".BX_UTF_PCRE_MODIFIER, $fields[$i]))
			{
				$fields[$i] = str_replace(""", """", $fields[$i]);
				//$fields[$i] = str_replace("\", "\\", $fields[$i]);
			}
			$content .= """;
			$content .= $fields[$i];
			$content .= """;

			// ms excel las limitation with total number of characters that a cell can contain 32767 characters
			if ($throw32KWarning !== true && $this->getStringByteLength($fields[$i]) > 32767)
			{
				$throw32KWarning = true;
			}
		}
		if ($content !== '')
		{
			$content .= $this->rowDelimiter;

			$length = $this->write($content);
			if ($length !== false)
			{
				$this->fileSize += $length;
			}
		}
	}
	// todo: $this->fieldsType == self::FIELDS_TYPE_FIXED_WIDTH

	if ($throw32KWarning)
	{
		if (!$this->hasError(self::ERROR_32K_FIELD_LENGTH))
		{
			$this->addError(new MainError(
				'Excel has limit when the total number of characters that a cell can contain is 32767 characters.',
				self::ERROR_32K_FIELD_LENGTH
			));
		}
	}

	return ($length !== false);
}