fputcsv Format line as CSV and write to file pointer intfputcsv resourcehandle arrayfields stringdelimiter stringenclosure fputcsv formats a line (passed as a fields array) as CSV and write it to the specified file handle. Returns the length of the written string, or &false; on failure. The optional delimiter parameter sets the field delimiter (one character only). Defaults as a comma: ,. The optional enclosure parameter sets the field enclosure (one character only) and defaults to a double quotation mark: ". ]]> ¬e.line-endings; See also fgetcsv.