Notes about upgrading to PhP 5.3.3.

<dl>
<dt> <code>ereg</code> functions are now deprecated</dt>
<dd> The solution is to use the corresponding <code>preg</code>:
<pre>
 eregi("xxx") -> preg_match('@xxx@i')
</pre>
<code>@</code> is used to start and the <i>pattern</i>.
Any character can be used, we use <code>@</code> so 
as to not match <code>/</code>
<br/>
<code>i</code> indicates that the search is case insensitive.
See <a href="http://www.php.net/manual/en/reference.pcre.pattern.modifiers.php">Pattern Modifiers</a>
<pre>
 ereg_replace -> preg_replace
</pre>
Same rules as above about start and end
</dd>
<dt> PCRE regular expressions need the <code>s</code>
modifier to match newlines in a multiline expression.</dt>
<dd>To handle the <code>&lt;!--margin--&gt;</code> directives in the toc files, <code>html.inc.php</code> had lines like
<pre>
if (eregi("<!--([+!]?)$s-->(.*)<!--/$s-->", $toc, $tmp)) {
</pre>
The proper replacement is
<pre>
 if (preg_match("@<!--([+!]?)$s-->(.*)<!--/$s-->@is", $toc, $tmp)) {
</pre>
Note that the regex ends in <code>is</code>, which means
case insensitive "<a hef="http://www.php.net/manual/en/reference.pcre.pattern.modifiers.php">dot metacharacter in the pattern matches all characters, including newlines."</a>
</dd>
</dl>