JS location.href opens a new page out of the box

Today, I encountered a problem in the framework. When the logon was judged to be invalid, I had to return to the logon page. However, the logon page was opened in the framework.

Echo "< Script language = \ "javascript \" > Alert (' login is invalid or not logged in, please log in! '); The location. The href = 'login. PHP'; < / script>" ;

To get it to jump out of the box and open the login page, use the following method:

Echo "< Script language = \ "javascript \" > Alert (' login is invalid or not logged in, please log in! '); Window. The top. The location. The href = 'login. PHP'; < / script>" ;

It's basically putting a window.top before a jump link. If you are opening a new window, you can use js window.open("url"," open mode "). To open a new window.