I'm using the following snippets of code, but can't get the text ("ST") to appear as superscript. I also tried subscript (didn't work). I added bold, which works.
$textrun = $section->createTextRun('pRight');
$textrun->addText("January 01", null);
$textrun->addText("ST", array('superScript'=>true, 'bold'=>true));
$textrun->addText(", 2011", null);
Can anyone advise what I'm doing wrong?