The redirect method of TP frame is how to realize jump? Look at the source code, totally incomprehensible.

The redirect method of TP frame is how to realize jump? A look at the source code, completely can not understand AH.
protected function Redirect ($url, $params =array (), $delay =0, $msg = ") {
$url = U ($url, $params);
Redirect ($url, $delay, $msg);
}



First live a URL, and then recursively pass in the third fourth parameter:


How does its jump come true???
------Solution--------------------
The redirect in the function body is called a function:

See the framework's built-in functions.php file
redirect
Description
void Redirect ($url, $time =0, $msg = ")
URL redirection
Source:

    function Redirect ($url, $time =0, $msg = ") {
        Multi-line URL address support
        $url = Str_replace (Array ("\ n", "\ R"), ", $url);
        if (empty ($msg))
            $msg = "The system will automatically jump to {$url}! after {$time} seconds ";
        if (!headers_sent ()) {
            redirect
            if (0 = = = $time) {
                Header (' Location: '. $url);
            } else {
                Header ("refresh:{$time};url={$url}");
                Echo ($msg);
            }
            Exit ();
        } else {
            $str = "
 
   ";
            if ($time! = 0)
                $str. = $msg;
            Exit ($STR);
        }
    }

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