Remove whitespace from csv

I have a problem when the user uploads a .CSV file. If some of the fields have a blank space at the end I can not remove it in any way.

For example: "[email protected]"

I have tried to use trim() , rtrim() and it does not work When I use str_replace() it removes all the spaces that it has in the middle of the string but that of the end does not remove.

I have looked everywhere and I do not find a solution. If anyone can help me, thank you.

Code as requested:

foreach($column_headers as $key => $value)
{
     $result[$new_row][$value] = trim($data[$key]);
}