最近对wordpress 3.1的升级打破了一个自定义插件，该插件是为了使用shortcode为brightcove视频生成简单的嵌入html而编写的。

有人能看到以下与3.1不兼容的代码中发生了什么，以及需要发生什么才能修复它吗？在升级之前，它在3.0中运行良好。

<?php

/*
Plugin Name: Brightcove Video Player
Version: 1.0
Plugin URI: http://www.brightcove.com
Description: Simplifies the process of adding a Brightcove video to a WordPress blog.
Author: Bob de Wit
Author URI: http://brightcove.active6.com
*/

//Set the publisher ID - YOU MUST SET THIS TO YOUR OWN PUBLISHER ID
$publisher = 1705665024;

//Set a default player to use - YOU MUST SET THIS TO YOUR OWN DEFAULT PLAYER
$player = 1911416499;

//Set width and height for the default video player
$width = 486;
$height = 412;

//Define default video variable
$videoid = 0;

//The actual parse content function called by the filter
//This will use the callback function BCVideo_Render to do the
//actual text replacement for the widget
function Brightcove_Parse($content)
{
    $content = preg_replace_callback("/\\[brightcove ([^]]*)\\/\\]/i", "Brightcove_Render", $content);
    return $content;
}

function Brightcove_Render($matches)
{
    global $video, $player, $publisher, $width, $height, $arguments;
    $output = \'\';
    $matches[1] = str_replace(array(\'&#8221;\',\'&#8243;\'), \'\', $matches[1]);
    preg_match_all(\'/(\\w*)=(.*?) /i\', $matches[1], $attributes);
    $arguments = array();

    foreach ( (array) $attributes[1] as $key => $value )
  {
        // Strip out legacy quotes
        $arguments[$value] = str_replace(\'"\', \'\', $attributes[2][$key]);
    }

  //print_r( $arguments );

    if (( !array_key_exists(\'video\', $arguments) ) && ( !array_key_exists(\'player\', $arguments) ))
  {
        return \'<div style="background-color:#f99; padding:10px;">Brightcove Player Widget Error: Required parameter "video" or "player" is missing!</div>\';
        exit;
    }
    else
    {
    $video = $arguments[\'video\'];
  }

    if( array_key_exists(\'width\', $arguments) )
  {
        $height = $arguments[\'width\'];
    }

    if( array_key_exists(\'height\', $arguments) )
  {
        $height = $arguments[\'height\'];
    }

    if( array_key_exists(\'player\', $arguments) )
  {
        $player = $arguments[\'player\'];
    }

  //$flashVars = "isVid=1&playerID=$player&publisherID=$publisher&@videoPlayer=$video";

  $output .= "<embed src=\'http://c.brightcove.com/services/viewer/federated_f9/$player?isVid=1&publisherID=$publisher\'
    bgcolor=\'#FFFFFF\'
    flashVars=\'@videoPlayer=$video&playerID=$player&domain=embed&\'
    base=\'http://admin.brightcove.com\'
    name=\'flashObj\'
    width=\'$width\'
    height=\'$height\'
    seamlesstabbing=\'false\'
    type=\'application/x-shockwave-flash\'
    allowFullScreen=\'true\'
    swLiveConnect=\'true\'
    pluginspage=\'http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash\'>
  </embed>";    

    return $output;
}

//Add a filter hook - this registers the function for all content
//text (Pages and Posts) to search for the [CONTRIBUTOR_WIDGET] tag.
add_filter(\'the_content\', \'Brightcove_Parse\');

?>