Action to do extra processing on the retrieved file (attachment) before returning the full file location.

do_action( 'pmpro_getfile_before_readfile', $filename, $file_mimetype );

Parameters

$filename

string; full URI to the file

$file_mimetype

string; a mimetype based on the file extension as returned by the pmpro_mimetype class.

Source

File: https://github.com/strangerstudios/paid-memberships-pro/blob/master/services/getfile.php