PHP5 GET变量的可变性和参考

Question

I have the following in a page e.g. /mypage?myvar=oldvalue

$_SESSION['myvar'] = $_GET['myvar'];
$myvar = 'a_new_string'

Now $_SESSION['myvar'] has the value 'a_new_string'

Is this by design?

How can I copy the value of 'myvar' rather than a reference to it?

Answer 1

register_globals is the invention of the devil. Fortunately in PHP 6.0 it will be entirely disabled. It wasn't just a huge security problem, it makes people confuse. Please turn it off in your php.ini using register_globals = Off More information: http://us2.php.net/register_globals Also you can check the current settings with the command if (ini_get(register_globals)) echo "turn it off! :)';