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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 |
|---|---|
| 416 | if ( '' == $author_nicename ) { |
| 417 | $user = get_userdata($author_id); |
| 418 | if ( !empty($user->user_nicename) ) |
| 419 | $author_nicename = $user->user_nicename; |
| 420 | } |
| 421 | $link = str_replace('%author%', $author_nicename, $link); |
| 422 | $link = get_option('home') . trailingslashit($link); |
| 423 | } |
| 424 | |
| 425 | $link = apply_filters('author_link', $link, $author_id, $author_nicename); |
| 426 | |
| 427 | return $link; |
| 428 | } |
| 429 | |
| 430 | /** |
| 431 | * Retrieve the specified author's preferred display name. |
| 432 | * |
| 433 | * @since 1.0.0 |
| 434 | * @param int $auth_id The ID of the author. |