Fatal error: Call to undefined function http_redirect() : Fixed

Issue: When I was trying to call the PHP http_redirect() function, below error came up:

Fatal error: Call to undefined function http_redirect() in location.

Add the below function in your php page
/**
 * redirect to a specific URL
 * @param $url
 */
     function redirect($url)
{
     if (!headers_sent())
     {  
          //If headers not sent yet... then do php redirect
          header('Location: '.$url); exit;
     }
     else
     {                  
          //If headers are sent... do javascript redirect...
          //if javascript disabled, do html redirect.
          echo '<script type="text/javascript">';
          echo 'window.location.href="'.$url.'";';
          echo '</script>';
          echo '<noscript>';
          echo '<meta http-equiv="refresh" content="0;url='.$url.'" />';
          echo '</noscript>'; exit;
     }
}  

then call the above function  to the page you wish the redirect to happen on

eg: redirect("redirect.php");