php get content between tags

This involves parsing the dom document.

<?php
function getTextBetweenTags($tag, $html)
{
    $dom = new domDocument;

    @$dom->loadHTML($html);
   
    $dom->preserveWhiteSpace = false;

    $content = $dom->getElementsByTagname($tag);

    $out = array();
   
    foreach ($content as $item)
    {
        $out[] = $item->nodeValue;
    }
    return $out;
}

$xhtml = '<tag>abc def</tag><tag>123 456</tag>';

$content2 = getTextBetweenTags('tag', $xhtml);

foreach( $content2 as $item )
{
    echo $item.'<br />';
}
?>

Output:

abc def
123 456