'Valor de bar', 'foo-bar' => 'Valor de foo-bar', '123-456' => 'Valor de 123-456', '123x456' => 'Valor de 123x456', '0a' => 'Valor de 0a' ]; echo " {$obj->foo} {$obj->{'foo-bar'}} {$obj->{'123-456'}} {$obj->{'123x456'}} {$obj->{'0a'}} "; echo <<foo} {$obj->{'foo-bar'}} {$obj->{'123-456'}} {$obj->{'123x456'}} {$obj->{'0a'}} EOT;