I've managed to update "pkrohn at daemonize dot com" array, after 12 years since initial publication.
If you want to change some of IPCT header-strings into something more human-readable, try to use array similar to this:
$iptcHeaderArray = array
(
'2#005'=>'DocumentTitle',
'2#010'=>'Urgency',
'2#015'=>'Category',
'2#020'=>'Subcategories',
'2#040'=>'SpecialInstructions',
'2#055'=>'CreationDate',
'2#080'=>'AuthorByline',
'2#085'=>'AuthorTitle',
'2#090'=>'City',
'2#095'=>'State',
'2#101'=>'Country',
'2#103'=>'OTR',
'2#105'=>'Headline',
'2#110'=>'Source',
'2#115'=>'PhotoSource',
'2#116'=>'Copyright',
'2#120'=>'Caption',
'2#122'=>'CaptionWriter'
);
