Recode the file referenced by file handle input into the file referenced by file handle output according to the recode request.
The desired recode request type
A local file handle resource for the input
A local file handle resource for the output
$input = fopen('input.txt', 'r');
$output = fopen('output.txt', 'w');
recode_file("us..flat", $input, $output);
This function does not currently process file handles referencing remote files (URLs). Both file handles must refer to local files.