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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 |
|---|---|
| 327 | if ( '' == $author_nicename ) { |
| 328 | $user = get_userdata($author_id); |
| 329 | if ( !empty($user->user_nicename) ) |
| 330 | $author_nicename = $user->user_nicename; |
| 331 | } |
| 332 | $link = str_replace('%author%', $author_nicename, $link); |
| 333 | $link = get_option('home') . trailingslashit($link); |
| 334 | } |
| 335 | |
| 336 | $link = apply_filters('author_link', $link, $author_id, $author_nicename); |
| 337 | |
| 338 | return $link; |
| 339 | } |
| 340 | |
| 341 | /** |
| 342 | * Get the specified author's preferred display name. |
| 343 | * @param int $auth_id The ID of the author. |
| 344 | * @return string The author's display name. |
| 345 | */ |