(PHP) Reject descriptions that don't include the required tags
<p>This is how my script currently sends errors when the description is too short:</p>

<pre><code>if(strlen($linkres-&gt;content) = minStoryLength ) { // if  description is too short
        $main_smarty-&gt;assign('submit_error', 'incomplete');
        $main_smarty-&gt;display($the_template . '/submit_errors.tpl');
        $error = true;
    }
</code></pre>

<p>I want to send the same error message when the description does not include at least one of these tags/words: </p>

<pre><code>&lt;img&gt;&lt;youtube&gt;&lt;googlevideo&gt;&lt;xoinks&gt;&lt;break&gt;&lt;vimeo&gt;&lt;revver&gt;&lt;myspace&gt;
&lt;veoh&gt;&lt;wmv&gt;&lt;dailymotion&gt;&lt;ifilm&gt;&lt;metacafe&gt;&lt;tubeley&gt;&lt;guba&gt;
</code></pre>

<p>thanks for your help!</p>
