I already ran into a major problem, though: using < in a HTML context is an absolute nono, as it will always be interpreted by the browser as the start of a tag. And the definition of the ID lives in a HTML context. So what you say would work in a URL that you type in the address bar, but not embedded in a web page. So perhaps we will have to look for an alternative symbol for indicating rotation to the left.
It seems Utrecht and Motif now work reasonably as well. And I had to fix escaping of some more characters in the PHP wrapper to make the FEN option work, as it chocked on the quotes and parentheses that would be used when indicating unorthodox and non-standard pieces. But that all works now.
Yes, theoretically.
I already ran into a major problem, though: using < in a HTML context is an absolute nono, as it will always be interpreted by the browser as the start of a tag. And the definition of the ID lives in a HTML context. So what you say would work in a URL that you type in the address bar, but not embedded in a web page. So perhaps we will have to look for an alternative symbol for indicating rotation to the left.
It seems Utrecht and Motif now work reasonably as well. And I had to fix escaping of some more characters in the PHP wrapper to make the FEN option work, as it chocked on the quotes and parentheses that would be used when indicating unorthodox and non-standard pieces. But that all works now.