Best way to give a variable a default value (simulate Perl ||, ||= )

Question

I love doing this sort of thing in Perl: $foo = $bar || $baz to assign $baz to $foo if $bar is empty or undefined. You al

Answer 1

In PHP earlier than 7.*, one may use ?: for an undefined variable having errors locally suppressed with an @:

$foo = @$bar ?: $baz;