Don’t know why, but most of times I see the PHP unset() multilined with a only one parameter!?
unset($var1); unset($var2); unset($var3);
But as you can see from the PHP doc page of unset() this method takes optional parameter count.
void unset(mixed $var [, mixed $var [, mixed $...]])
So perhaps a better solution can be:
unset($var1, $var2, $var3);
It’s at least single lined!