first key: 404;https://www_edmonds_edu:443/online/study/about_learning_online_php<br/>first_value: <br/>new_first_key: 404;https://www_edmonds_edu:443/online/study/about_learning_online_php<br/><pre>Array
(
    [404;https://www_edmonds_edu:443/online/study/about_learning_online_php] => 
)
array(1) {
  ["404;https://www_edmonds_edu:443/online/study/about_learning_online_php"]=>
  string(0) ""
}