Alternative to "header" for re-directs in PHP

By using the below code we redirect the page

$page = $_SERVER['REQUEST_URI'];
echo '<script type="text/javascript">';
echo 'window.location.href="'.$page.'";';
echo '</script>';

I use this function for redirect...

Which works in all situations..even if headers are already sent..or even javascript is disabled..

function redirect($url)
{
    if (!headers_sent())
    {    
        header('Location: '.$url);
        exit;
        }
    else
        {  
        echo '<script type="text/javascript">';
        echo 'window.location.href="'.$url.'";';
        echo '</script>';
        echo '<noscript>';
        echo '<meta http-equiv="refresh" content="0;url='.$url.'" />';
        echo '</noscript>'; exit;
    }
}

From the docs:

Remember that header() must be called before any actual output is sent, either by normal HTML tags, blank lines in a file, or from PHP.

Your echo is causing the redirect to fail, as is any other output sent before the header.