在wordpress主题开发中，想在标签文章列表页面获取当前标签的ID、别名怎么办？可以通过标签名称使用get_term_by()函数来实现，get_term_by()函数可以返回分类或标签的名称、别名和ID等信息。
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if(is_tag()){
$tagName = single_tag_title(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\',false);
$tagObject = get_term_by(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'name\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\',$tagName,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'post_tag\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\');
$tagID = $tagObject->term_id;
}
代码意思：在标签页面，选择获取当前标签页面的标签名称，使用该标签名称通过get_term_by()函数返回一个数组值，然后就可以获取数组中当前标签的ID了。
扩展：
也可以写成函数放在主题的functions.php文件（以下代码二选一）
代码一：
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function get_tag_id() {
$tagname = single_tag_title(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\',false);
$tag = get_term_by(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'name\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\', $tagname, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'post_tag\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\');
if($tag){
return $tag->term_id;
}else{
return 0;
}
}
代码二：
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function get_tag_id() {
$current_tag = single_tag_title(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\', false);
$tags = get_tags();
foreach($tags as $tag) {
if($tag->name == $current_tag) return $tag->term_id;
}
}
调用代码：
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<?php echo get_tag_id();?>
