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: ".
注: 如果碰到 PHP 在读取文件时不能识别 Macintosh 文件的行结束符,可以激活 auto_detect_line_endings 的运行时配置选项。
See also fgetcsv().