Sets the field enclosure (one character only).

``csv_end_of_line`` (default: ``\n``)

Sets the character(s) used to mark the end of each line in the CSV file.

``csv_escape_char`` (default: empty string)

..deprecated::7.2

The ``csv_escape_char`` option was deprecated in Symfony 7.2.

Sets the escape character (at most one character).

``csv_key_separator`` (default: ``.``)

Sets the separator for array's keys during its flattening

``csv_headers`` (default: ``[]``, inferred from input data's keys)