2020-05-01 / 5082阅 / 悠然
Retrieve post tag by tag ID or tag object.
If you pass the $tag parameter an object, which is assumed to be the tag row object retrieved the database. It will cache the tag data.
If you pass $tag an integer of the tag ID, then that tag will be retrieved from the database, if it isn’t already cached, and pass it back.
If you look at get_term(), then both types will be passed through several filters and finally sanitized based>
A tag ID or object.
The required return type.>WP_Term object, an associative array, or a numeric array, respectively.
Default value: OBJECT
Default is raw or no WordPress defined filter will applied.
Default value: 'raw'
(WP_Term|array|WP_Error|null) Tag data in type defined by $output parameter. WP_Error if $tag is empty, null if it does not exist.