WordPress 实现文章链接新窗口打开，站外链接自动加nofollow

以下是Wordpress做网站过程中常用的几个功能，分享给学习建网站的新手们。

功能一：文章内容全部链接新窗口打开

function Bing_autoblank($text) {

$return = str_replace('<a','<a target="_blank"',$text);

return $return;

}

if( Bing_get_panel('post_url_blank') ) add_filter('the_content','Bing_autoblank');

功能二：文章内容外链自动添加 nofollow 并在新窗口打开

function Bing_nf_url_parse($content){

$regexp = "<a\s[^>]*href=("??)([^" >]*?)\\1[^>]*>";

if(preg_match_all("/$regexp/siU", $content, $matches, PREG_SET_ORDER)){

if(!empty($matches)){

$srcUrl = get_option('siteurl');

for ($i=0; $i < count($matches); $i++)

{

$tag = $matches[$i][0];

$tag2 = $matches[$i][0];

$url = $matches[$i][0];

$noFollow = '';

$pattern = '/target\s*=\s*"\s*_blank\s*"/';

preg_match($pattern, $tag2, $match, PREG_OFFSET_CAPTURE);

if( count($match) < 1 )

$noFollow .= ' target="_blank" ';

$pattern = '/rel\s*=\s*"\s*[n|d]ofollow\s*"/';

preg_match($pattern, $tag2, $match, PREG_OFFSET_CAPTURE);

if( count($match) < 1 )

$noFollow .= ' rel="nofollow" ';

$pos = strpos($url,$srcUrl);

if ($pos === false) {

$tag = rtrim ($tag,'>');

$tag .= $noFollow.'>';

$content = str_replace($tag2,$tag,$content);

}

}

}

}

$content = str_replace(']]>', ']]>', $content);

return $content;

}

if( Bing_get_panel('post_url_blank_nofollow') ) add_filter('the_content','Bing_nf_url_parse');

功能三：评论作者链接新窗口打开

function Bing_comment_author_link() {

$url = get_comment_author_url( $comment_ID );

$author = get_comment_author( $comment_ID );

if ( empty( $url ) || 'http://' == $url ) return $author;

return '<a href="'. $url .'" rel="external nofollow" target="_blank" class="url">'.$author.'</a>';

}

add_filter('get_comment_author_link', 'Bing_comment_author_link');