What the heck is $function();
and $$variable
for?
Have never heard of these before, and searching on google doesn't give anything useful (possible that my keywords aren't perfect).
via https://stackoverflow.com/questions/4891301/top-bad-practices-in-php/4891422#4891422
$function()
is a variable function and $$variable
is a variable variable.
Those linked pages should give you plenty to go on, or at the very least some actual words to search with.
$$variable
can be quite useful. What it does:
$a = 1;
$b = "a";
echo $$b;
Outputs 1
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