Introduction
No dedicated formatting template is foreseen for formatting parameter sets. For advanced features to convert parameter sets to strings with opening, closing and separator strings, use the join() function instead.
echo( str( { 1, true, 'true', {b1, b2, { b2a, b2b }, b3 } } ) );{1,true,'true',{'b1','b2',{'b2a','b2b'},'b3'}}