copy () produces blank files

[Anon]

i've set the permissions on all the related files and directories to 777 but when i execute the following code, it produces a blank file rather then the template i would hope. any ideas? i'm stumped. also, what's the scoop on regular expressions? anyone know a tutorial for getting started with "fo" vs. "[foo]"?
many thanks!

<BR>
<?PHP
$cleaner = ereg_replace ("[^{a-z,A-Z,1-9]","_","$route_name");}
$source = "/home/ahumuna/humuna/template/$template";
$template = "rtemplate";
$destination = "/home/ahumuna/humuna/routes/$cleaner.html";

if(isset($route_name)) {

if (eregi("htm", "$route_name")) {
print "<font color='red'>no need for the .html; we'll take care of it.</font><br>\n";
} else { (copy ($source, $destination));
}

} else {
}

?>

[Anon]

They're really created, but have a zero length? Bizarre...

But I can offer you a little regex help here. The think you're asking about "fo" vs "[foo]" is this. The former is merely a sequence, it matches the target string if the sequence "fo" occurs anywhere withing the string. The latter is a character-class: it matches any single character that is one of the enclose characters. Thus in [foo] the second 'o' is redundant, and it will match the same set by just giving "[fo]".

As far as your actual regex here:

&nbsp;&nbsp;if (eregi("htm", "$route_name"))

it seems needlessly broad, since it will match if the sequence "htm" occurs anywhere at all inside the string, rather than just an extension. Instead, you might want to ask for:

&nbsp;&nbsp;if (eregi('\.html+$', $route_name))

This says, match a dot followed by 'htm' followed by zero or one lower-case L's (due to the +), and this must occur at the end of the string (due to the $.)

[Anon]

thanks, that definitly helps. i still can't find anything re: the copy problem though...