can't append record into a file?

[Anon]

Warning: fopen("credit_card.txt","a") - Permission denied in /home/group5/public_html/MemRegistration/RegMemConfirm.php on line 53

Warning: Supplied argument is not a valid File-Handle resource in /home/group5/public_html/MemRegistration/RegMemConfirm.php on line 54

Warning: Supplied argument is not a valid File-Handle resource in /home/group5/public_html/MemRegistration/RegMemConfirm.php on line 55

my code is:
//append record into file
$files = fopen("credit_card.txt", "a");
fwrite($files, $value);
fclose($files);

what's wrong with my code?

[mistcat]

I would say nothing is wrong with your code, there is something wrong with your file permissions. Fopen warns you that it can't open the file for writing. The other warnings say, Hey Yo your fopen failed, there is no file handle to use for these functioin calls. You should check:

that the path to your file is correct
that the user that PHP is running as has write permission to the file (MOST LIKELY PROBLEM!!!)
that the folder itself allows the PHP user to interact with data within that file.

Remember PHP runs as whoever apache runs at, not root, so it can't go playing with files willy nilly.