[mads@baggesen aros]$ cat test.php
<?php
print preg_replace("@<h[1234]>(.*)</h[1234]>@i", "Match: '$0'", "Hej <h2> Fisk ;
?>
[mads@baggesen aros]$ php test.php
Hej Match: '<h2> Fisk </h2> Med <h3> dig </h3>'
[mads@baggesen aros]$