Changing header based on request uri

404.php

<?php
  $uri = $_SERVER["REQUEST_URI"];
  $sapi_type = php_sapi_name();
  $resp = 404;
  if(strcasecmp($uri, '/test/hello.php') == 0) {
    $resp = 200;
  }
  if (substr($sapi_type, 0, 3) == 'cgi') {
    if($resp == 200) {
      header("Status: 200 OK");
    } else {
      header("Status: 404 Not Found");
    }
  } else {
    if($resp == 200) {
      header("HTTP/1.1 200 OK");
    } else {
      header("HTTP/1.1 404 Not Found");
    }
  }
?>