I've got this code segement:
--- snip ---
$buffer = fgets($if);
$e = split("\t", trim($buffer));
for ($ic = 0 ; $ic > count($e); $ic++) {
   $e[$ic] = trim($e[$ic]);
}
--- snap ---

The string in the array $e[] is never trimmed. In it does just the same as $e[$ic] = $e[$ic];
Same behaviour in chop!

When I changed the code to this:
--- snip ---
$buffer = fgets($if);
$b = trim($buffer);
$e = split("\t", $b);
for ($ic = 0 ; $ic < count($e); $ic++) {
   $t[$ic] = trim($e[$ic]);
}
--- snap ---

it works as expected.

Chris