you're talking about one of these characters, right?
try this....
copy the square (edit > copy if on windows)
then do something like
$db_output = str_replace('<goofy character>', '', $db_output);
just to be safe, create another file and simulate the output.
replace <goofy character> with edit > paste (if on windows).
here's what i mean.
$text = 'this is that goofy, character, darn';
$text = str_replace('', '', $text);
echo $text;
// output should be
// this is that goofy, character, darn
hope that works.
sijis