File Content: html-helper.php <?php namespace Yoast\WP\SEO\Helpers\Schema; /** * Class HTML_Helper. */ class HTML_Helper { /** * Sanitizes a HTML string by stripping all tags except headings, breaks, lists, links, paragraphs and formatting. * * @param string $html The original HTML. * * @return string The sanitized HTML. */ public function sanitize( $html ) { return \strip_tags( $html, '<h1><h2><h3><h4><h5><h6><br><ol><ul><li><a><p><b><strong><i><em>' ); } /** * Strips the tags in a smart way. * * @param string $html The original HTML. * * @return string The sanitized HTML. */ public function smart_strip_tags( $html ) { // Replace all new lines with spaces. $html = \preg_replace( '/(\r|\n)/', ' ', $html ); // Replace <br> tags with spaces. $html = \preg_replace( '/<br(\s*)?\/?>/i', ' ', $html ); // Replace closing </p> and other tags with the same tag with a space after it, so we don't end up connecting words when we remove them later. $html = \preg_replace( '/<\/(p|div|h\d)>/i', '</$1> ', $html ); // Replace list items with list identifiers so it still looks natural. $html = \preg_replace( '/(<li[^>]*>)/i', '$1• ', $html ); // Strip tags. $html = \wp_strip_all_tags( $html ); // Replace multiple spaces with one space. $html = \preg_replace( '!\s+!', ' ', $html ); return \trim( $html ); } } Submit