wordpress去掉<link rel='dns-prefetch' href='//s.w.org' />

　　我们在用wordpress建站时经常会看到<link rel='dns-prefetch' href='//s.w.org' />，应该是为了从s.w.org预获取表情和头像，目的是提高网页加载速度 ，但s.w.org国内根本无法访问，怎么把这个东西去掉呢？有几种方法：

　　1、在主题function.php文件中屏蔽

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1	remove_action( 'wp_head', 'wp_resource_hints', 2 );

　　或者下面这种改造过的方法，兼容性会好点

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function remove_dns_prefetch( $hints, $relation_type ) { if ( 'dns-prefetch' === $relation_type ) { return array_diff( wp_dependencies_unique_hosts(), $hints ); } return $hints; } add_filter( 'wp_resource_hints', 'remove_dns_prefetch', 10, 2 );

　　2、直接在文件去除相关函数，/wp-includes/general-template.php大概2903行全部注释　　

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//      foreach ( $urls as $key => $url ) { //          $atts = array(); // //          if ( is_array( $url ) ) { //              if ( isset( $url['href'] ) ) { //                  $atts = $url; //                  $url  = $url['href']; //              } else { //                  continue; //              } //          } // //          $url = esc_url( $url, array( 'http', 'https' ) ); // //          if ( ! $url ) { //              continue; //          } // //          if ( isset( $unique_urls[ $url ] ) ) { //              continue; //          } // //          if ( in_array( $relation_type, array( 'preconnect', 'dns-prefetch' ) ) ) { //              $parsed = wp_parse_url( $url ); // //              if ( empty( $parsed['host'] ) ) { //                  continue; //              } // //              if ( 'preconnect' === $relation_type && ! empty( $parsed['scheme'] ) ) { //                  $url = $parsed['scheme'] . '://' . $parsed['host']; //              } else { //                  // Use protocol-relative URLs for dns-prefetch or if scheme is missing. //                  $url = '//' . $parsed['host']; //              } //          } // //          $atts['rel'] = $relation_type; //          $atts['href'] = $url; // //          $unique_urls[ $url ] = $atts; //      }