Check Filenames

[lynlimz]

Hi,

How do I check a filename for certain type of characters? like...i want to disallow any file that has #, &, + etc in the filename. how do I do that?

Or simpler said, How do i allow a filename that only consists of letters and numbers?

[cokeman]

you could use regex to allow only acceptable characters, eg, [a-zA-Z0-9]* would allow zero or more letters (lower or upper case) or numbers. Actually, you could use eregi, and that would make it case-insensitive, so you wouldn't need to specify A-Z too.

for example:

if ( eregi("^[_a-z0-9]+$", $FName) )
{
echo "filename has one or more valid characters (_, 0-9, a-z).\n";
}

[lynlimz]

Thanks for your help cokeman!