- File: class-sitemaps-renderer.php
- Full Path: /home/matthif/www/wp-content/plugins/wordpress-seo/inc/sitemaps/class-sitemaps-renderer.php
- Date Modified: 02/24/2024 11:29 PM
- File size: 9.31 KB
- MIME-type: text/x-php
- Charset: utf-8
<?php
/**
* WPSEO plugin file.
*
* @package WPSEO\XML_Sitemaps
*/
/**
* Renders XML output for sitemaps.
*/
class WPSEO_Sitemaps_Renderer {
/**
* XSL stylesheet for styling a sitemap for web browsers.
*
* @var string
*/
protected $stylesheet = '';
/**
* Holds the get_bloginfo( 'charset' ) value to reuse for performance.
*
* @var string
*/
protected $charset = 'UTF-8';
/**
* Holds charset of output, might be converted.
*
* @var string
*/
protected $output_charset = 'UTF-8';
/**
* If data encoding needs to be converted for output.
*
* @var bool
*/
protected $needs_conversion = false;
/**
* Set up object properties.
*/
public function __construct() {
$stylesheet_url = preg_replace( '/(^http[s]?:)/', '', $this->get_xsl_url() );
$this->stylesheet = '<?xml-stylesheet type="text/xsl" href="' . esc_url( $stylesheet_url ) . '"?>';
$this->charset = get_bloginfo( 'charset' );
$this->output_charset = $this->charset;
if (
$this->charset !== 'UTF-8'
&& function_exists( 'mb_list_encodings' )
&& in_array( $this->charset, mb_list_encodings(), true )
) {
$this->output_charset = 'UTF-8';
}
$this->needs_conversion = $this->output_charset !== $this->charset;
}
/**
* Builds the sitemap index.
*
* @param array<string> $links Set of sitemaps index links.
*
* @return string
*/
public function get_index( $links ) {
$xml = '<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">' . "\n";
foreach ( $links as $link ) {
$xml .= $this->sitemap_index_url( $link );
}
/**
* Filter to append sitemaps to the index.
*
* @param string $index String to append to sitemaps index, defaults to empty.
*/
$xml .= apply_filters( 'wpseo_sitemap_index', '' );
$xml .= '</sitemapindex>';
return $xml;
}
/**
* Builds the sitemap.
*
* @param array<string> $links Set of sitemap links.
* @param string $type Sitemap type.
* @param int $current_page Current sitemap page number.
*
* @return string
*/
public function get_sitemap( $links, $type, $current_page ) {
$urlset = '<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1" '
. 'xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd '
. 'http://www.google.com/schemas/sitemap-image/1.1 http://www.google.com/schemas/sitemap-image/1.1/sitemap-image.xsd" '
. 'xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">' . "\n";
/**
* Filters the `urlset` for all sitemaps.
*
* @param string $urlset The output for the sitemap's `urlset`.
*/
$urlset = apply_filters( 'wpseo_sitemap_urlset', $urlset );
/**
* Filters the `urlset` for a sitemap by type.
*
* @param string $urlset The output for the sitemap's `urlset`.
*/
$xml = apply_filters( "wpseo_sitemap_{$type}_urlset", $urlset );
foreach ( $links as $url ) {
$xml .= $this->sitemap_url( $url );
}
/**
* Filter to add extra URLs to the XML sitemap by type.
*
* Only runs for the first page, not on all.
*
* @param string $content String content to add, defaults to empty.
*/
if ( $current_page === 1 ) {
$xml .= apply_filters( "wpseo_sitemap_{$type}_content", '' );
}
$xml .= '</urlset>';
return $xml;
}
/**
* Produce final XML output with debug information.
*
* @param string $sitemap Sitemap XML.
*
* @return string
*/
public function get_output( $sitemap ) {
$output = '<?xml version="1.0" encoding="' . esc_attr( $this->output_charset ) . '"?>';
if ( $this->stylesheet ) {
/**
* Filter the stylesheet URL for the XML sitemap.
*
* @param string $stylesheet Stylesheet URL.
*/
$output .= apply_filters( 'wpseo_stylesheet_url', $this->stylesheet ) . "\n";
}
$output .= $sitemap;
$output .= "\n<!-- XML Sitemap generated by Yoast SEO -->";
return $output;
}
/**
* Get charset for the output.
*
* @return string
*/
public function get_output_charset() {
return $this->output_charset;
}
/**
* Set a custom stylesheet for this sitemap. Set to empty to just remove the default stylesheet.
*
* @param string $stylesheet Full XML-stylesheet declaration.
*
* @return void
*/
public function set_stylesheet( $stylesheet ) {
$this->stylesheet = $stylesheet;
}
/**
* Build the `<sitemap>` tag for a given URL.
*
* @param array<string> $url Array of parts that make up this entry.
*
* @return string
*/
protected function sitemap_index_url( $url ) {
$date = null;
if ( ! empty( $url['lastmod'] ) ) {
$date = YoastSEO()->helpers->date->format( $url['lastmod'] );
}
$url['loc'] = htmlspecialchars( $url['loc'], ENT_COMPAT, $this->output_charset, false );
$output = "\t<sitemap>\n";
$output .= "\t\t<loc>" . $url['loc'] . "</loc>\n";
$output .= empty( $date ) ? '' : "\t\t<lastmod>" . htmlspecialchars( $date, ENT_COMPAT, $this->output_charset, false ) . "</lastmod>\n";
$output .= "\t</sitemap>\n";
return $output;
}
/**
* Build the `<url>` tag for a given URL.
*
* Public access for backwards compatibility reasons.
*
* @param array<string> $url Array of parts that make up this entry.
*
* @return string
*/
public function sitemap_url( $url ) {
$date = null;
if ( ! empty( $url['mod'] ) ) {
// Create a DateTime object date in the correct timezone.
$date = YoastSEO()->helpers->date->format( $url['mod'] );
}
$output = "\t<url>\n";
$output .= "\t\t<loc>" . $this->encode_and_escape( $url['loc'] ) . "</loc>\n";
$output .= empty( $date ) ? '' : "\t\t<lastmod>" . htmlspecialchars( $date, ENT_COMPAT, $this->output_charset, false ) . "</lastmod>\n";
if ( empty( $url['images'] ) ) {
$url['images'] = [];
}
foreach ( $url['images'] as $img ) {
if ( empty( $img['src'] ) ) {
continue;
}
$output .= "\t\t<image:image>\n";
$output .= "\t\t\t<image:loc>" . $this->encode_and_escape( $img['src'] ) . "</image:loc>\n";
$output .= "\t\t</image:image>\n";
}
unset( $img );
$output .= "\t</url>\n";
/**
* Filters the output for the sitemap URL tag.
*
* @param string $output The output for the sitemap url tag.
* @param array $url The sitemap URL array on which the output is based.
*/
return apply_filters( 'wpseo_sitemap_url', $output, $url );
}
/**
* Ensure the URL is encoded per RFC3986 and correctly escaped for use in an XML sitemap.
*
* This method works around a two quirks in esc_url():
* 1. `esc_url()` leaves schema-relative URLs alone, while according to the sitemap specs,
* the URL must always begin with a protocol.
* 2. `esc_url()` escapes ampersands as `&` instead of the more common `&`.
* According to the specs, `&` should be used, and even though this shouldn't
* really make a difference in practice, to quote Jono: "I'd be nervous about &
* given how many weird and wonderful things eat sitemaps", so better safe than sorry.
*
* @link https://www.sitemaps.org/protocol.html#xmlTagDefinitions
* @link https://www.sitemaps.org/protocol.html#escaping
* @link https://developer.wordpress.org/reference/functions/esc_url/
*
* @param string $url URL to encode and escape.
*
* @return string
*/
protected function encode_and_escape( $url ) {
$url = $this->encode_url_rfc3986( $url );
$url = esc_url( $url );
$url = str_replace( '&', '&', $url );
$url = str_replace( ''', ''', $url );
if ( strpos( $url, '//' ) === 0 ) {
// Schema-relative URL for which esc_url() does not add a scheme.
$url = 'http:' . $url;
}
return $url;
}
/**
* Apply some best effort conversion to comply with RFC3986.
*
* @param string $url URL to encode.
*
* @return string
*/
protected function encode_url_rfc3986( $url ) {
if ( filter_var( $url, FILTER_VALIDATE_URL ) ) {
return $url;
}
$path = wp_parse_url( $url, PHP_URL_PATH );
if ( ! empty( $path ) && $path !== '/' ) {
$encoded_path = explode( '/', $path );
// First decode the path, to prevent double encoding.
$encoded_path = array_map( 'rawurldecode', $encoded_path );
$encoded_path = array_map( 'rawurlencode', $encoded_path );
$encoded_path = implode( '/', $encoded_path );
$url = str_replace( $path, $encoded_path, $url );
}
$query = wp_parse_url( $url, PHP_URL_QUERY );
if ( ! empty( $query ) ) {
parse_str( $query, $parsed_query );
$parsed_query = http_build_query( $parsed_query, '', '&', PHP_QUERY_RFC3986 );
$url = str_replace( $query, $parsed_query, $url );
}
return $url;
}
/**
* Retrieves the XSL URL that should be used in the current environment
*
* When home_url and site_url are not the same, the home_url should be used.
* This is because the XSL needs to be served from the same domain, protocol and port
* as the XML file that is loading it.
*
* @return string The XSL URL that needs to be used.
*/
protected function get_xsl_url() {
if ( home_url() !== site_url() ) {
return home_url( 'main-sitemap.xsl' );
}
/*
* Fallback to circumvent a cross-domain security problem when the XLS file is
* loaded from a different (sub)domain.
*/
if ( strpos( plugins_url(), home_url() ) !== 0 ) {
return home_url( 'main-sitemap.xsl' );
}
return plugin_dir_url( WPSEO_FILE ) . 'css/main-sitemap.xsl';
}
}