是否可以使用Actionscript只读取文件的第一行？

I've got a PHP-based site where we allow users to upload a comma-separated text file of data to be imported by some server side scripts. However, sometimes we need to adjust the column order of the data that is uploaded, and it would be immensely helpful if we could identify the columns in the CSV file I've got a PHP-based site where we allow users