在等待另一个站点的值时显示或隐藏div元素

Question

In PHP, is it possible to use conditions that will display either one of two div elements? My pseudocode:

//in Site 1
$tokenFromSite1 = 'xxx';
$tokenFromSite2 = '';
while($tokenFromSite1 != $tokenFromSite2){
    //show div containing Connect button;
    clickConnect(); //includes $tokenFromSite1 value as URL param "token" and opens a new tab to Site 2
        //in Site 2
        //gets $tokenFromSite1 value and opens a URL containing this value as param "token" and redirects to site 1
    //back to Site 1
    $tokenFromSite2 = //GET value of param "token"
}
//div containing Connect button disappears and shows a div that says "Connected"

I am not sure if my logic is correct, and how exactly is Site 1 going to "wait" for the token value from Site 2. Also, how do I hide/show div elements?

Answer 1

It's not possible. PHP is compiled server side. It will run the full script and then output the results. In order to achieve what you want you will need a jQuery code that uses AJAX. Because it's a client side script it can interact with the user's screen after the page is loaded.