Filters the data for a file before it is uploaded to WordPress.

The dynamic portion of the hook name, $action, refers to the post action.

Possible hook names include:

• wp_handle_sideload_prefilter
• wp_handle_upload_prefilter

$file array

Reference to a single element from $_FILES.

• namestring
  The original name of the file on the client machine.
• typestring
  The mime type of the file, if the browser provided this information.
• tmp_namestring
  The temporary filename of the file in which the uploaded file was stored on the server.
• sizeint
  The size, in bytes, of the uploaded file.
• errorint
  The error code associated with this file upload.

File: wp-admin/includes/file.php. View all references

$file = apply_filters( "{$action}_prefilter", $file );