Is there a good PHP library for vectors and matrices? [closed]
There is
and a number of other related PEAR packages about Math
I do not know if they suit your needs though. See for yourself.
There used to be a PHP4 port of the JAMA matrix library at http://www.phpmath.com but it seems to have disappeared from the site. We use it in PHPExcel (though I've updated it a bit to PHP5)
There is this library:
https://sourceforge.net/projects/phpmatrixlib/
it contains matrix multiply, inverse, transpose and determinant