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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
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196 |
|
197 | if ( !$count ) |
198 | return false; |
199 |
|
200 | wp_cache_delete($object_id, $meta_type . '_meta'); |
201 | // users cache stores usermeta that must be cleared. |
202 | if ( 'user' == $meta_type ) |
203 | clean_user_cache($object_id); |
204 |
|
205 | do_action( "deleted_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $meta_value ); |
206 |
|
207 | return true; |
208 | } |
209 |
|
210 | /** |
211 | * Retrieve metadata for the specified object. |
212 | * |
213 | * @since 2.9.0 |
214 | * |