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Where can I read about conditionals done with ? and :

I want do the following without using if else or a ternary operator:

if $_GET['a'] is not null then set $a= $_GET['a'] else set its value to "default".

I tried $a= $_GET['a'] || "default". but it doesnt work.
I remember seeing something like this in a code sample, but I can’t recall now.

Answer 1

I think a ternary if is your best bet here.

In this case I would use isset check – to determine if the key is set and is not null:

$a = isset($_GET['a']) ? $_GET['a'] : "default"

The or operator || doesn’t work to null coalesce like that in PHP, but you might have seen it in JavaScript where it can be used to set a value to the first non-false result:

e.g

var a = get['a'] || 'default';