Which PHP tags are always available?
<p>Of the 4 types of PHP tags:</p>

<ul>
<li><strong>Standard</strong> tag : <code>&lt;?php ...?&gt;</code></li>
<li><strong>Short</strong> tag : <code>&lt;? .... ?&gt;</code></li>
<li><strong>Script</strong> tag: <code>&lt;script language=“php”&gt;
... &lt;/script&gt;</code></li>
<li><strong>ASP</strong> tag : <code>&lt;% ... %&gt;</code></li>
</ul>

<p>Which is/are <strong><em>always</em></strong> available ?</p>
