Use proper filename for attachment post title

[rilwis]

In media_handle_upload() function, the file name (and thus, attachment title) is gotten from $_FILES[ $file_id ]['name']. This is the raw/original file name when uploaded. However, developers can change file name after upload by filtering to sanitize_file_name or use unique_filename_callback parameter. This makes the file name (and title) doesn't represent the correct file name after upload.

$name = $_FILES[ $file_id ]['name'];
$ext  = pathinfo( $name, PATHINFO_EXTENSION );
$name = wp_basename( $name, ".$ext" );

$url     = $file['url'];
$type    = $file['type'];
$file    = $file['file'];
$title   = sanitize_text_field( $name );

A simple patch for this is this:

$name = $file['file']; // Get the proper name
$ext  = pathinfo( $name, PATHINFO_EXTENSION );
$name = wp_basename( $name, ".$ext" );

I tested the patch with classic editor and it works well. However, I haven't figured out for the block editor.

[rilwis]

Patch for use proper file name after upload