Simple helper for embeding flash objects using Unobtrusive Flash Objects (UFO). Download and install ufo.js to js/ufo.js and place your movies (*.swf) to web/swf, FlashHelper.php in your lib/helper directory.

In your template

<div id="flashcontent">
  This text is replaced by the Flash movie.
</div>
<?php use_helper('Flash'); ?>
<?php echo flash_object('flashcontent', array(
  'movie'=>'movie.swf', 
  'width'=>'200', 
  'height'=>'300', 
  'bgcolor'=> '#FFFFFF'); 
?>

FlashHelper.php

<?php
 /**
  * Flash object helper - embeds Flash objects (files with the .swf extension)
  * 
  * Uses Unobtrusive Flash Objects (UFO) 
  * 
  * @param string $id - The ID od the div which will be replaced by flash movie
  * @param mixed  $options - Flash object options 
  * @see http://www.bobbyvandersluis.com/ufo/
  */
function flash_object($id, $options = array())
{  
  sfContext::getInstance()->getResponse()->addJavascript('ufo.js');
 
  $options = _parse_attributes($options);
  $absolute = false;
  if (isset($options['absolute']))
  {
    unset($options['absolute']);
    $absolute = true;
  }  
  if(isset($options['size']))
  {
    list($options['width'], $options['height']) = split('x', $options['size'], 2);
    unset($options['size']);
  }
  if(!isset($options['majorversion'])) 
  {
    $options['majorversion'] = 7; 
  }  
  if(!isset($options['build'])) 
  {
    $options['build'] = 0; 
  }  
  // check for all required params  
  foreach(array('movie', 'width', 'height', 'majorversion', 'build') as $required)
  {
    if(!isset($options[$required]))
    {
      throw new sfException("{FlashHelper} Required parameter \"$required\" is missing.");
    }
  }               
  $options['movie'] = flash_path($options['movie'], $absolute);  
  $opts = array();
  foreach ($options as $key => $value)
  {
    $opts[] = $key . ': "' . $value . '"';
  }
  sort($opts);
  // javascript variable name
  $name = $id . '_var';  
  $js = 'var ' . $name . " = {".join(', ', $opts)."};\n";   
  $js .= 'UFO.create('.$name.', "'.$id.'");'."\n";   
  return content_tag('script', "\n//".cdata_section("\n$js\n//")."\n", array('type' => 'text/javascript')); 
}
 
 /**
 * Returns the path to a flash swf movie.
 *
 * <b>Example:</b>
 * <code>
 *  echo flash_path('mymovie');
 *    => /swf/mymovie.swf
 * </code>
 *
 * <b>Note:</b> The asset name can be supplied as a...
 * - full path, like "/swf/movie.swf"
 * - file name, like "movie.swf", that gets expanded to "/swf/movie.swf"
 * - file name without extension, like "movie", that gets expanded to "/swf/movie.css"
 *
 * @param  string asset name
 * @param  bool return absolute path ?
 * @return string file path to the flash movie file
 */
function flash_path($source, $absolute = false)
{
  return _compute_public_path($source, 'swf', 'swf', $absolute);
}