stupidly (or to be precise: mainly because no-one has asked for it before i think) it’s not as simple as it should be really .

give me a few hours and i’ll add a filter to the plugin that will let you do that much more easily than hacking around or extending classes etc etc.

i’ll post code here ….

Hi,

as I want to add some more things to the next update it might take a few days more to make this available.
in the meantime you can do the following

in wppizza/classes/wppizza.send-order-emails.inc.php AFTER

$this->subjectSuffix 	=	''.$this->orderTimestamp.'';

(at approx line 30) ADD the following

/**make subject filterable**/
$this->subjectPrefix = apply_filters('wppizza_filter_email_subject_prefix', $this->subjectPrefix);
$this->subject = apply_filters('wppizza_filter_email_subject', $this->subject);
$this->subjectSuffix = apply_filters('wppizza_filter_email_subject_suffix', $this->subjectSuffix);

then in your themes function.php file you can do this to add ‘cmd: print lp1’ before the whole subject line.

/**filter the prefix**/
add_filter('wppizza_filter_email_subject_prefix', 'my_custom_email_subject_prefix');
function my_custom_email_subject_prefix($subjectPrefix) {
	/**by default this equals get_bloginfo()**/
	$subjectPrefix='(cmd: print lp1)'.$subjectPrefix;
	return $subjectPrefix;
}

hope that helps for the time being