Description:
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It would be a really nice if mail() supported an extra parameter for 
attachments. Perhaps an array containing the filenames (and whose 
keys, if present, would be the name of the attachments).

(I know there are ways of doing this by installing pear classes, but 
that isn't always an option. And it's awkward to do it by hand).

Given that mail() is already rather overloaded, it might be worth 
adding another function, say mail_attach() to do it.



Reproduce code:
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Current alternative:

$cmd = "echo '$BODY_TEXT'  | mutt -s '$SUBJECT' -a '$filename_1' -a '$filename_2' '$email'";
exec ($cmd);

which is ugly, has external dependencies, only works on Linux, and will break in interesting ways if shell-quoting isn't corrected.