examples/server-rendering/webapp/index.php

<?php

// URL to the box running `node server.js`
define('RENDER_SERVER', 'http://localhost:3000/');

function react_component($module, $props) {
  $props_json = json_encode($props);

  // Try to server-render the component if the service is available.
  // If it isn't, no big deal: the client will transparently render
  // the markup!
  $server_markup = @file_get_contents(
    RENDER_SERVER .
      '?module=' .
      urlencode($module) .
      '&props=' .
      urlencode($props_json)
  );

  $container_id = uniqid();

  // Generate the code required to run the component on the client.
  // We assume that the Browserify bundle is loaded in the page already
  // and that you used -r to get a global require() function that provides
  // every $module you may request as well as React.
  // Note that this solution is simple but I don't think it scales to
  // multiple large pages very well. For that you'd be better off using
  // webpack.
  $startup_code =
    '<script>require(\'react\').render(require(' .
    json_encode($module) .
    ')(' . $props_json . '), ' .
    'document.getElementById(' . json_encode($container_id) . '))' .
    '</script>';

  $container_markup = '<div id="' . $container_id . '">' . $server_markup . '</div>';

  return $container_markup . $startup_code;
}
?>

<html>
  <head>
    <title>React server rendering example</title>
    <script src="static/bundle.js"></script>
  </head>
  <body>
    Welcome to the React server rendering example. Here is a server-rendered React component:
    <?php echo react_component('./src/App', array('name' => 'Pete')); ?>
  </body>
</html>