excerpt_remove_footnotes

WordPress Version: 6.3

/**
 * Parses footnotes markup out of a content string,
 * and renders those appropriate for the excerpt.
 *
 * @since 6.3.0
 *
 * @param string $content The content to parse.
 * @return string The parsed and filtered content.
 */
function excerpt_remove_footnotes($content)
{
    if (!str_contains($content, 'data-fn=')) {
        return $content;
    }
    return preg_replace('_<sup data-fn="[^"]+" class="[^"]+">\s*<a href="[^"]+" id="[^"]+">\d+</a>\s*</sup>_', '', $content);
}