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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 |
|---|---|
| 464 | * |
| 465 | * @since Twenty Thirteen 1.0 |
| 466 | * |
| 467 | * @return string The Link format URL. |
| 468 | */ |
| 469 | function twentythirteen_get_link_url() { |
| 470 | $content = get_the_content(); |
| 471 | $has_url = get_url_in_content( $content ); |
| 472 | |
| 473 | return ( $has_url ) ? $has_url : apply_filters( 'the_permalink', get_permalink() ); |
| 474 | } |
| 475 | |
| 476 | /** |
| 477 | * Extend the default WordPress body classes. |
| 478 | * |
| 479 | * Adds body classes to denote: |
| 480 | * 1. Single or multiple authors. |
| 481 | * 2. Active widgets in the sidebar to change the layout and spacing. |
| 482 | * 3. When avatars are disabled in discussion settings. |