php输出html有关问题，

php输出html问题，！急
如何把php输出的html代码加入到网页中并显示，php输出的代码是一个广告页面！

这个是showads.php

PHP code

<!--

Code highlighting produced by Actipro CodeHighlighter (freeware)
http://www.CodeHighlighter.com/

--><?php
echo <<<eof
<p>
    <script type="text/javascript">
    google_ad_client = "pub-3381531532877742";
    google_ad_slot = "7423315034";
    google_ad_width = 728;
    google_ad_height = 90;
    </script>
    <script type="text/javascript"
    src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
    </script>
      </p>
      <p>
        <script type="text/javascript">
    google_ad_client = "pub-3381531532877742";
    google_ad_slot = "7423315034";
    google_ad_width = 728;
    google_ad_height = 90;
        </script>
    <script type="text/javascript"
    src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
    </script>
    </p>
eof;
?>

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