之前老左博客一直有使用WP keyword Link Plugin插件，但是發(fā)現(xiàn)這個插件已經(jīng)好久沒有更新，好像目前在平臺中已經(jīng)找不到。所以準備替換掉這個插件。類似的WordPress插件還是有很多的，比如Keywords to Links Converter、Auto Tag Links等都可以實現(xiàn)。
本著少用插件，能不用插件就不用的策略，所以準備還是無插件實現(xiàn)。
//自動TAG轉(zhuǎn)內(nèi)鏈
$match_num_from = 2; // 一個TAG標簽出現(xiàn)幾次才加鏈接
$match_num_to = 1; // 同一個標簽加幾次鏈接
add_filter('the_content','tag_link',1);
function tag_sort($a, $b){
if ( $a->name == $b->name ) return 0;
return ( strlen($a->name) > strlen($b->name) ) ? -1 : 1;
}
function tag_link($content){
global $match_num_from,$match_num_to;
$posttags = get_the_tags();
if ($posttags) {
usort($posttags, "tag_sort");
foreach($posttags as $tag) {
$link = get_tag_link($tag->term_id);
$keyword = $tag->name;
$cleankeyword = stripslashes($keyword);
$url = "<a href=\"$link\" title=\"".str_replace('%s',addcslashes($cleankeyword, '$'),__('View all posts in %s'))."\"";
$url .= ' target="_blank"';
$url .= ">".addcslashes($cleankeyword, '$')."</a>";
$limit = rand($match_num_from,$match_num_to);
$content = preg_replace( '|(<a[^>]+>)(.*)('.$ex_word.')(.*)(</a[^>]*>)|U'.$case, '$1$2%&&&&&%$4$5', $content);
$content = preg_replace( '|(<img)(.*?)('.$ex_word.')(.*?)(>)|U'.$case, '$1$2%&&&&&%$4$5', $content);
$cleankeyword = preg_quote($cleankeyword,'\'');
$regEx = '\'(?!((<.*?)|(<a.*?)))('. $cleankeyword . ')(?!(([^<>]*?)>)|([^>]*?</a>))\'s' . $case;
$content = preg_replace($regEx,$url,$content,$limit);
$content = str_replace( '%&&&&&%', stripslashes($ex_word), $content);
}
}
return $content;
}
