Description:
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hi, this is probably an old behavior to make php backward compatible when register_global was enabled

parse_str("hey all=1",$r); ---> array('hey_all' => '1');

parse_str is now widely used in xmlhttprequest communication and may cause a lot of issues and waste of time when debugging because we are not able to know how exactly what type of character sanitizing is made to root keys

yep, only root keys are sanitized because

parse_str("aaa[hey all]=1",$r); ---> array('aaa' => array('hey all', '1'));

works like expected

so my request is not to change the default behavior of this function (and how $_GET $_POST etc are populated)

but add another parameter to this function for who wants root keys parsed without sanitizing

void parse_str ( string $str [, array &$arr ] [, bool $bwcompatible = true])

thank you