Getting h2 and h3 headings from text in a recordset

Hi Ray, I have some HTML text in a database and I need to extract the h2 and h3 headings from the text to construct a table of contents. I found the following bit of code whilst searching online, but having tried to replace the html text example with the contents of the recordset, I can't get it to work. This is the code:

<?php
$headings='
<h2>This is heading h2</h2>
<h3>This is heading h3</h3>
';

function fnextractHeadins($headingtag, $headings)
{
$headingText = '';
preg_match_all( '|<'.$headingtag.'>(.*)</'.$headingtag.'>|iU', $headings, $headings );
foreach($headings[0] as $headh2val)
{
$headingText.=$headh2val;
}
return $headingText;
}
echo fnextractHeadins('h2', $headings);
echo fnextractHeadins('h3', $headings);
?>

I want to replace the content shown in $headings with echo($rsRecordset->getColumnVal("ChapterText")); but my syntax must be wrong as it doesn't display anything. Can you help?

Try using:
echo($rsRecordset->getColumnVal("ChapterText",false));

The "false" disables the cross site scripting prevention code and allows html to be returned from the recordset.

I got it to work using the following:

<?php
$html = preg_replace_callback("#<(h[2-3])>(.*?)</\\1>#", "retitle", $rsRecordset->getColumnVal("ChapterText",false));

function retitle($match) {
list($_unused, $h2, $title) = $match;

$id = strtolower(strtr($title, " .", "--"));

echo "<$h2><a href='#$id'>$title</a></$h2>";
}
?>

This also generates an id for each h2 and h3 heading so that it can be used as an anchor link.

Might be useful to someone else!