I was recently reviewing some of my code and noticed that in a fit of absent-mindedness, I'd left a structure like the following:
$guid = empty($subscription->guid) ? : $subscription->guid;
Now, this wasn't doing what it's supposed to and is wrong, but since that property is always set now it was working fine, and there's no syntax error since 5.3 because of the following change:
Since PHP 5.3, it is possible to leave out the middle part of the ternary operator. Expression expr1 ?: expr3 returns expr1 if expr1 evaluates to TRUE, and expr3 otherwise.
I wasn't aware of this change, and now I'm curious if I should be using it or not. This is something I was sorely missing from languages like ruby where you can do eg,
a = b || c to get either
c rather than a 'real' boolean. However, the syntax they've chosen for the ternary operator seems a little counter intuitive to me. Should I be using this in production code? It definitely threw myself when I saw it by accident.