Question

has_tag( string|int|array $tag = '',  int|object $post = null )

Check if the current post has any of given tags.

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description

The given tags are checked against the post’s tags’ term_ids, names and slugs. Tags given as integers will only be checked against the post’s tags’ term_ids. If no tags are given, determines if post has any tags.

Prior to v2.7 of WordPress, tags given as integers would also be checked against the post’s tags’ names and slugs (in addition to term_ids) Prior to v2.7, this function could only be used in the WordPress Loop. As of 2.7, the function can be used anywhere if it is provided a post ID or post object.

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参数

$tag

(string|int|array) (Optional) The tag name/term_id/slug or array of them to check for.

Default value: ''

$post

(int|object) (Optional) Post to check instead of the current post. (since 2.7.0)

Default value: null

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返回值

(bool) True if the current post has any of the given tags (or any tag, if no tag specified).

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源代码

File: wp-includes/category-template.php

function has_tag( $tag = '', $post = null ) {
	return has_term( $tag, 'post_tag', $post );
}

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更新日志

Version	description
2.6.0	Introduced.

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相关函数

Uses

• wp-includes/category-template.php: has_term()

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User Contributed Notes

1. Skip to note content You must log in to vote on the helpfulness of this noteVote results for this note: 2You must log in to vote on the helpfulness of this note Contributed by Andrea Castenetto

   If the article has tags, show them. Else do nothing. It works in the loop.

   
   if(has_tag()) {
       the_tags();
   } else {
       //Article untagged
   }
   

If Post has tag, show them. Else if Post has category, show category. Otherwise do other.

if(has_tag()) {

      the_tags(); //show tags

} elseif(has_category()) {

      the_category(); //show category

} else {
      //do something different
}