Shorthand expression for an if ( $a == $b || $a == $c ) statement

I know this code will work:

echo ( $a == $b || $a == $c ) ? "Yes" : "No";

That can be read like:

if $a is equal to $b or $a is equal to $c

Is there a way to make it more shorter like:

if $a is equal to $b or $c

I have tried a lot including this but still no luck:

echo ( $a == ( $b xor $c ) ) ? "Yes" : "No";