josephbergdoll/LiveReloadTwigExtension.php

## LiveReloadTwigExtension.php
<?php
// LiveReload script injection for those using grunt-watch
// This way you don't have to go to the localhost port
// Call this function once in the <head> of your layout.twig via {{ liveReload }}
// You can disable it by either removing or passing {{ liveReload(false) }}
// Add the local domain you are developing from by passing it as the second argument:
// {{ liveReload(true, 'example.dev') }}

namespace Craft;

class LiveReloadTwigExtension extends \Twig_Extension {
  public function getName() {
    return 'LiveReload Script Injection';
  }

  public function getFunctions() {
    return array(
      'liveReload' => new \Twig_Function_Method($this, 'liveReload', array('is_safe' => array('html'))),
    );
  }


  public function liveReload($enable = true, $domain = null) {
    if ($enable == true) {
      $whitelist = array(
        '127.0.0.1',
        '::1',
        'localhost',
      );

      if ($domain != null) {
        $whitelist[] = $domain;
      }

      if(in_array($_SERVER['REMOTE_ADDR'], $whitelist)){
        echo '<script src="http://localhost:35729/livereload.js?snipver=1"></script>';
      }
    }
  }
	<?php
	// LiveReload script injection for those using grunt-watch
	// This way you don't have to go to the localhost port
	// Call this function once in the <head> of your layout.twig via {{ liveReload }}
	// You can disable it by either removing or passing {{ liveReload(false) }}
	// Add the local domain you are developing from by passing it as the second argument:
	// {{ liveReload(true, 'example.dev') }}

	namespace Craft;

	class LiveReloadTwigExtension extends \Twig_Extension {
	public function getName() {
	return 'LiveReload Script Injection';
	}

	public function getFunctions() {
	return array(
	'liveReload' => new \Twig_Function_Method($this, 'liveReload', array('is_safe' => array('html'))),
	);
	}


	public function liveReload($enable = true, $domain = null) {
	if ($enable == true) {
	$whitelist = array(
	'127.0.0.1',
	'::1',
	'localhost',
	);

	if ($domain != null) {
	$whitelist[] = $domain;
	}

	if(in_array($_SERVER['REMOTE_ADDR'], $whitelist)){
	echo '<script src="http://localhost:35729/livereload.js?snipver=1"></script>';
	}
	}
	}