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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 |
|---|---|
| 2341 | elseif ( $cur->meta_value != $meta_value ) |
| 2342 | $wpdb->update($wpdb->usermeta, compact('meta_value'), compact('user_id', 'meta_key') ); |
| 2343 | else |
| 2344 | return false; |
| 2345 | |
| 2346 | clean_user_cache( $user_id ); |
| 2347 | wp_cache_delete( $user_id, 'user_meta' ); |
| 2348 | |
| 2349 | if ( !$cur ) |
| 2350 | do_action( 'added_usermeta', $wpdb->insert_id, $user_id, $meta_key, $meta_value ); |
| 2351 | else |
| 2352 | do_action( 'updated_usermeta', $cur->umeta_id, $user_id, $meta_key, $meta_value ); |
| 2353 | |
| 2354 | return true; |
| 2355 | } |
| 2356 | |
| 2357 | /** |
| 2358 | * Get users for the site. |
| 2359 | * |