Adding (file type, file size) to every link

Hi,

I’m trying to find out how to add formatting for every link type to output as File_name (file_type, file_size)

e.g.

this_pdf_file (PDF, 300KB)
this_word_doc (Word Document, 55KB)

Currently in functions.php I have:
function my_function( $formatted_file_size) {
$formatted_file_size = str_replace ( “(” , “(PDF, ” , $formatted_file_size ) ;
//$formatted_file_size = $formatted_file_size . ‘)’ ;
return $formatted_file_size;
}
add_filter( ‘mtli_filesize’, ‘my_function’);

But this just puts “PDF” for every attachment- I need it to change dynamically depending on file type.

Not sure if this should go in functions.php or in singular.php or index.php.

Cheers.

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