if (!isset($_SERVER['PHP_AUTH_USER'])) {
    header('WWW-Authenticate: Basic realm="My Realm"');
    header('HTTP/1.0 401 Unauthorized');
    echo 'Text to send if user hits Cancel button';
} else {
    echo "<p>Hello {$_SERVER['PHP_AUTH_USER']}.</p>";
    echo "<p>You entered {$_SERVER['PHP_AUTH_PW']} as your password.</p>";

Dear All,

Above is a code example from php.net

What I am left wondering is the SEQUENCE OF FLOW of logic here. Assume a
page has ONLY this code. Then the 1st time the if condition will branch into
if part ( and not the else ) . Then it will send a header and ask for a
username/password pair. When I enter that it is STILL in the IF part. How
will it jump to the else part and authorize me UNLESS when I press enter it
reloads the page. Maybe I am tired and not thinking straight. Would love to
hear a clarification on this.

Thank you,

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