Getty Personality, php command line update ...

[WhyRegister]

When I hexdump the image file, I see Iptc4core and Personality data that I entered with PhotoMechanic.
I try to update the JPG with:
exec('exiftool -xmp-getty:Personality="SplatterMMM" IPTC_20200725143.jpg', $output, $returnCode);   I see -getty as a group, but ...
Or
exec('exiftool -xmp-Iptc4xmpCore:Personality="SplatterOOO" IPTC_20200725143.jpg', $output, $returnCode);
Or
exec('exiftool -xmp-GettyImagesGIFT:Personality="SplatterXXX" IPTC_20200725143.jpg', $output, $returnCode);
All fail. Or the update may occur, but when I view the IPTC in PhotoMechanic the Personality field is not changed or not valued.
Two questions:
A. What is the command to update the Getty Personality using PHP command? Change my command rather than typing in a brand new one, which is too generic.
B. If exiftool not installed on my host, then can I have PHP execute a Perl script and the Perl script accesses/uses the exiftool library? I would copy the exiftool library (Remember I can't install. I don't have permissions/access). Then write a simple script taking parameters from the PHP exec()?
I have done IPTC changes uses the exiftool, but when I review the image in PhotoMechanic I don't see the changes.

From the hexdump, I can only grab the translated section (no linefeeds):
Info>.         <
GettyImagesGIFT:
Personality>.   
         <rdf:Se
q>.             
  <rdf:li>item 3
6 UPDATE</rdf:li
>.            </
rdf:Seq>.       
  </GettyImagesG
IFT:Personality>

.      </rdf:Des
cription>.   </r
df:RDF>.</x:xmpm
eta>.           

[StarGeek]

Don't try to figure out the name of a tag from other programs or hex dumps.  Use the command in FAQ #3.  Then make sure your command works properly on the command line before trying to call it from another program.

Code Select Expand

C:\>exiftool -P -overwrite_original -XMP:Personality="John Smith" -api compact=1 y:\!temp\Test4.jpg
    1 image files updated

C:\>exiftool -G1 -a -s -xmp:all y:\!temp\Test4.jpg
[XMP-x]         XMPToolkit                      : Image::ExifTool 12.41
[XMP-getty]     Personality                     : John Smith

C:\>exiftool -b -xmp y:\!temp\Test4.jpg
<?xpacket begin='' id='W5M0MpCehiHzreSzNTczkc9d'?>
<x:xmpmeta xmlns:x='adobe:ns:meta/' x:xmptk='Image::ExifTool 12.41'>
<rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#'>

<rdf:Description rdf:about=''
  xmlns:GettyImagesGIFT='http://xmp.gettyimages.com/gift/1.0/'>
  <GettyImagesGIFT:Personality>
   <rdf:Bag>
    <rdf:li>John Smith</rdf:li>
   </rdf:Bag>
  </GettyImagesGIFT:Personality>
</rdf:Description>
</rdf:RDF>
</x:xmpmeta>
<?xpacket end='w'?>
C:\>

As for the data not showing up in PhotoMechanic, you probably have to look for a "Reload Metadata" command.  You're making a change to the metadata outside of PhotoMechanic and it won't know about it unless up tell it to update the data.