Changes to $GLOBALS
%$GLOBALS% uses INDIRECT variables:
int(2)
%$GLOBALS% are by-ref:
int(2)
Writes to %$GLOBALS% as a whole are no longer supported
Generates compile-time error:
$GLOBALS = [];
$GLOBALS += [];
This no longer modifies %$a%:
$a = 4;
$globals = $GLOBALS;
$globals['a'] = 1;
var_dump($a);
int(4)