if i have an expression that evaluates to an object, the return value from a
function, say, and i only want the value of one of the objects properties,
is there a tidy way to get it without setting another variable?

to illustrate, here's something that doesn't work, but it would be
convenient if it did:

$o = array( (object) array('a'=>1), (object) array('a'=>2) );

if ( end($o)->a > 1 ) {  // can't use -> like this!

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