使用PHP结束循环，直到找到匹配项

这是我学习了几周后第一次尝试编写php脚本。基本上，我正在解析一个XML博客提要。首先，它获取博客发布日期，如果它匹配基于洛杉矶时区的今天的日期，它将进一步获取当天当前博客发布的url。否则它将返回"no match"。一旦找到今天的博客文章，它将收集每个帖子的url。现在这是我的问题，无论我做什么，它总是返回不匹配的代码，我正在寻找。我假设它没有检查每个url，但由于我的知识有限，我可以肯定。我正试图用正则表达式搜索每个帖子的数字字符串，如果发现我想回显该字符串并结束脚本，或者如果没有找到代码回显消息，说明并结束脚本。此外，如果你找到一个更好的方法或更有效的方式重写我的代码来清理它，我也欢迎

/*------------------------------------------------
//XML File and Parsing
------------------------------------------------*/
//XML document 
$rss = simplexml_load_file($xmlfeed);
//Blog Dates
$blogdate = $rss->channel->item;
//Blog URLS
$blogurl = $rss->channel->item;
/*------------------------------------------------
//Date Variables
------------------------------------------------*/
//Original date format: Mon, 26 Sep 2011 22:00:08 +0000
$post_date = $date->pubDate;
//Original date format: September 26 2011
$todays_date = date("F j Y");
$timezone = new DateTimeZone('America/Los_Angeles');
//Format blog post dates into PDT
$date1 = new DateTime($post_date);
$date1->setTimeZone($timezone);
//Output date: September 26 2011
$post_date_final = $date1->format("F j Y");
//Format server date into PDT
$date2 = new DateTime($todays_date);
$date2->setTimeZone($timezone);
//Output date: September 26 2011
$todays_date_final = $date2->format("F j Y");
echo $post_date;
/*------------------------------------------------
//Checking and Looping
------------------------------------------------*/
//Looping through blog dates for a mtach
foreach ($blogdate as $date) {
    //If dates match continue to gather URLs
    if ( $post_date_final == $todays_date_final ) {
        foreach ($blogurl as $url) {
            $postone = $url->guid[0];
            $posttwo = $url->guid[1];
            $postthree = $url->guid[2];
            $postfour = $url->guid[3];
            $postfive = $url->guid[4];
            $postsix = $url->guid[5];
            $go = array($postone, $posttwo, $postthree, $postfour, $postfive, $postsix);
            foreach ($go as $stop){
                $html = file_get_contents($stop);
                preg_match('/cd='b[0-9]{8,15}'b/', $html, $match);
                $regex_match = $match[0];
                if (isset($regex_match)) {
                    echo $regex_match;
                }else{
                    echo "no match";
                    exit;
                }
            }
        }
    }else{
        echo "no match";
        exit;
    }
}