__ __ __ __ _____ _ _ _____ _ _ _
| \/ | \ \ / / | __ \ (_) | | / ____| | | | |
| \ / |_ __\ V / | |__) | __ ___ ____ _| |_ ___ | (___ | |__ ___| | |
| |\/| | '__|> < | ___/ '__| \ \ / / _` | __/ _ \ \___ \| '_ \ / _ \ | |
| | | | |_ / . \ | | | | | |\ V / (_| | || __/ ____) | | | | __/ | |
|_| |_|_(_)_/ \_\ |_| |_| |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
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<?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 ) {
if ( ! $this->is_non_empty_string_or_stringable( $html ) ) {
if ( \is_int( $html ) || \is_float( $html ) ) {
return (string) $html;
}
return '';
}
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 ) {
if ( ! $this->is_non_empty_string_or_stringable( $html ) ) {
if ( \is_int( $html ) || \is_float( $html ) ) {
return (string) $html;
}
return '';
}
// 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 );
}
/**
* Verifies that the received input is either a string or stringable object.
*
* @param string $html The original HTML.
*
* @return bool
*/
private function is_non_empty_string_or_stringable( $html ) {
return ( \is_string( $html ) || \is_object( $html ) && \method_exists( $html, '__toString' ) ) && ! empty( $html );
}
}