PHP WPSEO_Utils::is_url_relative方法代碼示例

 /**
  * Display an OpenGraph image tag
  *
  * @param string $img - Source URL to the image
  *
  * @return bool
  */
 private function add_image($img)
 {
     // Filter: 'wpseo_opengraph_image' - Allow changing the OpenGraph image */
     $img = trim(apply_filters('wpseo_opengraph_image', $img));
     if (empty($img)) {
         return false;
     }
     if (WPSEO_Utils::is_url_relative($img) === true) {
         $img = $this->get_relative_path($img);
     }
     if (in_array($img, $this->images)) {
         return false;
     }
     array_push($this->images, $img);
     return true;
 }

/**
 * Check whether a url is relative
 *
 * @deprecated 1.6.1
 * @deprecated use WPSEO_Utils::is_url_relative()
 * @see WPSEO_Utils::is_url_relative()
 *
 * @param string $url
 *
 * @return bool
 */
function wpseo_is_url_relative($url)
{
    _deprecated_function(__FUNCTION__, 'WPSEO 1.6.1', 'WPSEO_Utils::is_url_relative()');
    return WPSEO_Utils::is_url_relative($url);
}

 /**
  * Count the number of anchors and group them by type.
  *
  * @param object $xpath An XPATH object of the current document.
  *
  * @return array
  */
 function get_anchor_count(&$xpath)
 {
     $query = '//a|//A';
     $dom_objects = $xpath->query($query);
     $count = array('total' => 0, 'internal' => array('nofollow' => 0, 'dofollow' => 0), 'external' => array('nofollow' => 0, 'dofollow' => 0), 'other' => array('nofollow' => 0, 'dofollow' => 0));
     if (is_object($dom_objects) && is_a($dom_objects, 'DOMNodeList') && $dom_objects->length > 0) {
         foreach ($dom_objects as $dom_object) {
             $count['total']++;
             if ($dom_object->attributes->getNamedItem('href')) {
                 $href = $dom_object->attributes->getNamedItem('href')->textContent;
                 $wpurl = get_bloginfo('url');
                 if (WPSEO_Utils::is_url_relative($href) === true || substr($href, 0, strlen($wpurl)) === $wpurl) {
                     $type = 'internal';
                 } elseif (substr($href, 0, 4) == 'http') {
                     $type = 'external';
                 } else {
                     $type = 'other';
                 }
                 if ($dom_object->attributes->getNamedItem('rel')) {
                     $link_rel = $dom_object->attributes->getNamedItem('rel')->textContent;
                     if (stripos($link_rel, 'nofollow') !== false) {
                         $count[$type]['nofollow']++;
                     } else {
                         $count[$type]['dofollow']++;
                     }
                 } else {
                     $count[$type]['dofollow']++;
                 }
             }
         }
     }
     return $count;
 }

 /**
  * This function normally outputs the canonical but is also used in other places to retrieve
  * the canonical URL for the current page.
  *
  * @return void
  */
 private function generate_canonical()
 {
     $canonical = false;
     $canonical_override = false;
     // Set decent canonicals for homepage, singulars and taxonomy pages
     if (is_singular()) {
         $obj = get_queried_object();
         $canonical = get_permalink($obj->ID);
         $this->canonical_unpaged = $canonical;
         $canonical_override = WPSEO_Meta::get_value('canonical');
         // Fix paginated pages canonical, but only if the page is truly paginated.
         if (get_query_var('page') > 1) {
             $num_pages = substr_count($obj->post_content, '<!--nextpage-->') + 1;
             if ($num_pages && get_query_var('page') <= $num_pages) {
                 if (!$GLOBALS['wp_rewrite']->using_permalinks()) {
                     $canonical = add_query_arg('page', get_query_var('page'), $canonical);
                 } else {
                     $canonical = user_trailingslashit(trailingslashit($canonical) . get_query_var('page'));
                 }
             }
         }
     } else {
         if (is_search()) {
             $canonical = get_search_link();
         } elseif (is_front_page()) {
             $canonical = home_url();
         } elseif ($this->is_posts_page()) {
             $canonical = get_permalink(get_option('page_for_posts'));
         } elseif (is_tax() || is_tag() || is_category()) {
             $term = get_queried_object();
             $canonical_override = WPSEO_Taxonomy_Meta::get_term_meta($term, $term->taxonomy, 'canonical');
             $canonical = get_term_link($term, $term->taxonomy);
         } elseif (is_post_type_archive()) {
             $post_type = get_query_var('post_type');
             if (is_array($post_type)) {
                 $post_type = reset($post_type);
             }
             $canonical = get_post_type_archive_link($post_type);
         } elseif (is_author()) {
             $canonical = get_author_posts_url(get_query_var('author'), get_query_var('author_name'));
         } elseif (is_archive()) {
             if (is_date()) {
                 if (is_day()) {
                     $canonical = get_day_link(get_query_var('year'), get_query_var('monthnum'), get_query_var('day'));
                 } elseif (is_month()) {
                     $canonical = get_month_link(get_query_var('year'), get_query_var('monthnum'));
                 } elseif (is_year()) {
                     $canonical = get_year_link(get_query_var('year'));
                 }
             }
         }
         $this->canonical_unpaged = $canonical;
         if ($canonical && get_query_var('paged') > 1) {
             global $wp_rewrite;
             if (!$wp_rewrite->using_permalinks()) {
                 if (is_front_page()) {
                     $canonical = trailingslashit($canonical);
                 }
                 $canonical = add_query_arg('paged', get_query_var('paged'), $canonical);
             } else {
                 if (is_front_page()) {
                     $canonical = wpseo_xml_sitemaps_base_url('');
                 }
                 $canonical = user_trailingslashit(trailingslashit($canonical) . trailingslashit($wp_rewrite->pagination_base) . get_query_var('paged'));
             }
         }
     }
     $this->canonical_no_override = $canonical;
     if (is_string($canonical) && $canonical !== '') {
         // Force canonical links to be absolute, relative is NOT an option.
         if (WPSEO_Utils::is_url_relative($canonical) === true) {
             $canonical = $this->base_url($canonical);
         }
     }
     /**
      * Filter: 'wpseo_canonical' - Allow filtering of the canonical URL put out by WP SEO
      *
      * @api string $canonical The canonical URL
      */
     $canonical = apply_filters('wpseo_canonical', $canonical);
     if (is_string($canonical_override) && $canonical_override !== '') {
         $this->canonical = $canonical_override;
     } else {
         $this->canonical = $canonical;
     }
 }

//.........這裏部分代碼省略.........
                  * @api string $url URL to use in the XML sitemap
                  *
                  * @param object $p Post object for the URL
                  */
                 $url['loc'] = apply_filters('wpseo_xml_sitemap_post_url', $url['loc'], $p);
                 $url['chf'] = $this->filter_frequency($post_type . '_single', 'weekly', $url['loc']);
                 /**
                  * Do not include external URLs.
                  * @see https://wordpress.org/plugins/page-links-to/ can rewrite permalinks to external URLs.
                  */
                 if (false === strpos($url['loc'], $this->home_url)) {
                     continue;
                 }
                 $canonical = WPSEO_Meta::get_value('canonical', $p->ID);
                 if ($canonical !== '' && $canonical !== $url['loc']) {
                     /* Let's assume that if a canonical is set for this page and it's different from
                        the URL of this post, that page is either already in the XML sitemap OR is on
                        an external site, either way, we shouldn't include it here. */
                     continue;
                 } else {
                     if ($this->options['trailingslash'] === true && $p->post_type != 'post') {
                         $url['loc'] = trailingslashit($url['loc']);
                     }
                 }
                 unset($canonical);
                 $url['pri'] = $this->calculate_priority($p);
                 $url['images'] = array();
                 $content = $p->post_content;
                 $content = '<p><img src="' . $this->image_url(get_post_thumbnail_id($p->ID)) . '" alt="' . $p->post_title . '" /></p>' . $content;
                 if (preg_match_all('`<img [^>]+>`', $content, $matches)) {
                     foreach ($matches[0] as $img) {
                         if (preg_match('`src=["\']([^"\']+)["\']`', $img, $match)) {
                             $src = $match[1];
                             if (WPSEO_Utils::is_url_relative($src) === true) {
                                 if ($src[0] !== '/') {
                                     continue;
                                 } else {
                                     // The URL is relative, we'll have to make it absolute
                                     $src = $this->home_url . $src;
                                 }
                             } elseif (strpos($src, 'http') !== 0) {
                                 // Protocol relative url, we add the scheme as the standard requires a protocol
                                 $src = $scheme . ':' . $src;
                             }
                             if (strpos($src, $host) === false) {
                                 continue;
                             }
                             if ($src != esc_url($src)) {
                                 continue;
                             }
                             if (isset($url['images'][$src])) {
                                 continue;
                             }
                             $image = array('src' => apply_filters('wpseo_xml_sitemap_img_src', $src, $p));
                             if (preg_match('`title=["\']([^"\']+)["\']`', $img, $title_match)) {
                                 $image['title'] = str_replace(array('-', '_'), ' ', $title_match[1]);
                             }
                             unset($title_match);
                             if (preg_match('`alt=["\']([^"\']+)["\']`', $img, $alt_match)) {
                                 $image['alt'] = str_replace(array('-', '_'), ' ', $alt_match[1]);
                             }
                             unset($alt_match);
                             $image = apply_filters('wpseo_xml_sitemap_img', $image, $p);
                             $url['images'][] = $image;
                         }
                         unset($match, $src);

 /**
  * Fallback function for WP SEO functionality, is_url_relative
  *
  * @param $url
  *
  * @return mixed
  */
 public static function yoast_wpseo_video_is_url_relative($url)
 {
     if (method_exists('WPSEO_Utils', 'is_url_relative')) {
         return WPSEO_Utils::is_url_relative($url);
     }
     return wpseo_is_url_relative($url);
 }

 /**
  * Parsing the matched images
  *
  * @param array  $matches
  * @param object $p
  * @param string $scheme
  * @param string $host
  *
  * @return array
  */
 private function parse_matched_images($matches, $p, $scheme, $host)
 {
     $return = array();
     foreach ($matches[0] as $img) {
         if (preg_match('`src=["\']([^"\']+)["\']`', $img, $match)) {
             $src = $match[1];
             if (WPSEO_Utils::is_url_relative($src) === true) {
                 if ($src[0] !== '/') {
                     continue;
                 } else {
                     // The URL is relative, we'll have to make it absolute.
                     $src = $this->home_url . $src;
                 }
             } elseif (strpos($src, 'http') !== 0) {
                 // Protocol relative url, we add the scheme as the standard requires a protocol.
                 $src = $scheme . ':' . $src;
             }
             if (strpos($src, $host) === false) {
                 continue;
             }
             if ($src != esc_url($src)) {
                 continue;
             }
             if (isset($return[$src])) {
                 continue;
             }
             $image = array('src' => apply_filters('wpseo_xml_sitemap_img_src', $src, $p));
             if (preg_match('`title=["\']([^"\']+)["\']`', $img, $title_match)) {
                 $image['title'] = str_replace(array('-', '_'), ' ', $title_match[1]);
             }
             unset($title_match);
             if (preg_match('`alt=["\']([^"\']+)["\']`', $img, $alt_match)) {
                 $image['alt'] = str_replace(array('-', '_'), ' ', $alt_match[1]);
             }
             unset($alt_match);
             $image = apply_filters('wpseo_xml_sitemap_img', $image, $p);
             $return[] = $image;
         }
         unset($match, $src);
     }
     return $return;
 }

 /**
  * Make absolute URL for domain or protocol-relative one.
  *
  * @param string $src URL to process.
  *
  * @return string
  */
 protected function get_absolute_url($src)
 {
     if (WPSEO_Utils::is_url_relative($src) === true) {
         if ($src[0] !== '/') {
             return $src;
         }
         // The URL is relative, we'll have to make it absolute.
         return $this->home_url . $src;
     }
     if (strpos($src, 'http') !== 0) {
         // Protocol relative url, we add the scheme as the standard requires a protocol.
         return $this->scheme . ':' . $src;
     }
     return $src;
 }

 /**
  * Display an OpenGraph image tag
  *
  * @param string $img Source URL to the image
  *
  * @return bool
  */
 public function image_output($img)
 {
     /**
      * Filter: 'wpseo_opengraph_image' - Allow changing the OpenGraph image
      *
      * @api string $img Image URL string
      */
     $img = trim(apply_filters('wpseo_opengraph_image', $img));
     if (empty($img)) {
         return false;
     }
     if (WPSEO_Utils::is_url_relative($img) === true) {
         if ($img[0] != '/') {
             return false;
         }
         // If it's a relative URL, it's relative to the domain, not necessarily to the WordPress install, we
         // want to preserve domain name and URL scheme (http / https) though.
         $parsed_url = parse_url(home_url());
         $img = $parsed_url['scheme'] . '://' . $parsed_url['host'] . $img;
     }
     if (in_array($img, $this->shown_images)) {
         return false;
     }
     array_push($this->shown_images, $img);
     $this->og_tag('og:image', esc_url($img));
     return true;
 }

 /**
  * Parsing the matched images
  *
  * @param array  $matches Set of matches.
  * @param object $post    Post object.
  *
  * @return array
  */
 private function parse_matched_images($matches, $post)
 {
     $return = array();
     foreach ($matches as $img) {
         if (!preg_match('`src=["\']([^"\']+)["\']`', $img, $match)) {
             continue;
         }
         $src = $match[1];
         if (WPSEO_Utils::is_url_relative($src) === true) {
             if ($src[0] !== '/') {
                 continue;
             }
             // The URL is relative, we'll have to make it absolute.
             $src = $this->home_url . $src;
         } elseif (strpos($src, 'http') !== 0) {
             // Protocol relative url, we add the scheme as the standard requires a protocol.
             $src = $this->scheme . ':' . $src;
         }
         if (strpos($src, $this->host) === false) {
             continue;
         }
         if ($src !== esc_url($src)) {
             continue;
         }
         if (isset($return[$src])) {
             continue;
         }
         $image = array('src' => apply_filters('wpseo_xml_sitemap_img_src', $src, $post));
         if (preg_match('`title=["\']([^"\']+)["\']`', $img, $title_match)) {
             $image['title'] = str_replace(array('-', '_'), ' ', $title_match[1]);
         }
         unset($title_match);
         if (preg_match('`alt=["\']([^"\']+)["\']`', $img, $alt_match)) {
             $image['alt'] = str_replace(array('-', '_'), ' ', $alt_match[1]);
         }
         unset($alt_match);
         /**
          * Filter image data to be included in XML sitemap for the post.
          *
          * @param array $image {
          *     Array of image data.
          *
          *     @type string $src Image URL.
          *     @type string $title Image title attribute (optional).
          *     @type string $alt Image alt attribute (optional).
          * }
          * @param object $post  Post object.
          */
         $image = apply_filters('wpseo_xml_sitemap_img', $image, $post);
         $return[] = $image;
         unset($match, $src);
     }
     return $return;
 }

 /**
  * Outputs a Twitter image tag for a given image
  *
  * @param string  $img The source URL to the image.
  * @param boolean $tag Deprecated argument, previously used for gallery images.
  *
  * @return bool
  */
 protected function image_output($img, $tag = false)
 {
     if ($tag) {
         _deprecated_argument(__METHOD__, 'WPSEO 2.4');
     }
     /**
      * Filter: 'wpseo_twitter_image' - Allow changing the Twitter Card image
      *
      * @api string $img Image URL string
      */
     $img = apply_filters('wpseo_twitter_image', $img);
     if (WPSEO_Utils::is_url_relative($img) === true && $img[0] === '/') {
         $parsed_url = parse_url(home_url());
         $img = $parsed_url['scheme'] . '://' . $parsed_url['host'] . $img;
     }
     $escaped_img = esc_url($img);
     if (in_array($escaped_img, $this->shown_images)) {
         return false;
     }
     if (is_string($escaped_img) && $escaped_img !== '') {
         $this->output_metatag('image', $escaped_img, true);
         array_push($this->shown_images, $escaped_img);
         return true;
     }
     return false;
 }