<?php $a = state(0); $b = state(0); $app = div( [ cls('container') ], [ h2([], [ text('Two Counters + Sum') ]), div( [ cls('my-2') ], [ div( [ cls('btn-group ') ], [ button([ cls('btn btn-primary'), on('click', inc($a, -1))], [ text('A--') ]), button([cls('btn btn-primary'), on('click', inc($a, 1))], [ text('A++') ]), ]), span([], [ text(concat(' A = ', read($a))) ]) ]), div( [ cls('my-2') ], [ div( [ cls('btn-group ') ], [ button([ cls('btn btn-primary'), on('click', inc($b, -1)) ], [ text('B--') ]), button([ cls('btn btn-primary'), on('click', inc($b, 1)) ], [ text('B++') ]), ]), span([], [ text(concat(' B = ', read($b))) ]) ]), h3([], [ text(concat('Sum = ', add($a, read($b)))) ]), ]);