Flash 5 question

I've got a simple Flash5 file and I'm trying to figure out syntax to send a line of data to a PHP file that will then write to a text file (simple scoreboard). I'm learning PHP, and I've got the files created in php (a form that will accept a line of text and write it to a .txt file), properties are set on my server correctly, and I'm trying to modify what I've got. I have Flash 5 (yeah I know it's ancient) with Actionscript 1 (yeah). My apologies if this is the wrong forum - it seemed to be close enough to at least start asking. If someone can point me in the right direction (given these ancient resources I've got) I'd be grateful. Are my only options GETURL and post/get methods? If so, I can't seem to find the right syntax.