do_action( 'learndash_purchase_invoice_thumbnail_processing_start', string $img_file, array $purchase_invoice_args, TCPDF $pdf )
Fires when thumbnail image processing starts.
do_action( 'learndash_purchase_invoice_thumbnail_processing_start', string $img_file, array $purchase_invoice_args, TCPDF $pdf )
Fires when thumbnail image processing starts.