Lines:

<?php

// Thanks WordPress...
/* function is_ssl() – */

$url = ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . (!empty($_SERVER['HTTP_POST']) && 80 != $_SERVER['HTTP_POST'] ? ':' . $_SERVER['HTTP_POST'] : '');
if ( strpos($_SERVER['REQUEST_URI'], '?') )
  $url .= substr($_SERVER['REQUEST_URI'], 0, strpos($_SERVER['REQUEST_URI'], '?'));
else
  $url .= $_SERVER['REQUEST_URI'];

if ( isset($_GET['source']) ) {
  highlight_file(__FILE__ );
  exit;
}

if ( isset($_GET['201-location']) ) {
  header("HTTP/1.1 201 OK");
  if ( isset($_GET['fail']) ) {
    echo "FAIL";
  } else {
    header("Location: $url?201-location&fail=true", true, 201);
    echo "PASS";
  }
  exit;
}
if ( isset($_GET['header-check']) ) {
  $out = array();
  header("Content-type: text/plain");
  foreach ( $_SERVER as $key => $value ) {
    if ( stripos($key, 'http') === 0 ) {
      $key = strtolower(substr($key, 5));
      echo "$key:$value\n";
    }
  }
  exit;
}
if ( isset($_GET['multiple-headers']) ) {
  header("HeaderName: One", false);
  header("HeaderName: Two", false);
  header("HeaderName: Three", false);
  exit;
}

if ( isset( $_GET['post-redirect-to-method'] ) ) {
  $method = $_SERVER['REQUEST_METHOD'];
  $response_code = isset( $_GET['response_code'] ) ? $_GET['response_code'] : 301;

  if ( 'POST' == $method && ! isset( $_GET['redirection-performed'] ) ) {
    header( "Location: $url?post-redirect-to-method=1&redirection-performed=1", true, $response_code );
    exit;
  }

  echo $method;
  exit;
  
}

if ( isset( $_GET['location-with-200'] ) ) {
  if ( ! isset( $_GET['redirection-performed'] ) ) {
    header( "HTTP/1.1 200 OK" );
    header( "Location: $url?location-with-200=1&redirection-performed", true, 200 );
    echo 'PASS';
    exit;
  }
  // Redirection was followed.
  echo 'FAIL';
  exit;
}

if ( isset( $_GET['print-pass'] ) ) {
  echo 'PASS';
  exit;
}

if ( isset( $_GET['multiple-location-headers'] ) ) {
  if ( ! isset( $_GET['redirected'] ) ) {
    header( "Location: $url?multiple-location-headers=1&redirected=one", false );
    header( "Location: $url?multiple-location-headers=1&redirected=two", false );
    exit;
  }
  if ( 'two' != $_GET['redirected'] )
    echo 'FAIL';
  else
    echo 'PASS';
  exit;
}

if ( isset( $_GET['cookie-test'] ) ) {
  if ( 'test-cookie' != $_GET['cookie-test'] ) {
    setcookie( 'api_test_cookie', 'value', time() + 365*24*60*60, '/core/tests/1.0/', 'api.wordpress.org' );
    setcookie( 'api_test_cookie_minimal', 'value'  );
    setcookie( 'api_test_cookie_wrong_host', 'value', time() + 365*24*60*60, '/', 'example.com' );
    setcookie( 'api_test_wildcard_domain', 'value', time() + 365*24*60*60, '/', '.wordpress.org' );
    setcookie( 'api_test_cookie_expired', 'value', time() - 365*24*60*60, '/', '.wordpress.org' );
    header( "Location: $url?cookie-test=test-cookie" );
    exit;
  }

  if ( empty( $_COOKIE['api_test_cookie'] ) || 'value' != $_COOKIE['api_test_cookie'] )

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