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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 |
|---|---|
| 446 | * |
| 447 | * @since Twenty Thirteen 1.0 |
| 448 | * |
| 449 | * @return string The Link format URL. |
| 450 | */ |
| 451 | function twentythirteen_get_link_url() { |
| 452 | $content = get_the_content(); |
| 453 | $has_url = get_url_in_content( $content ); |
| 454 | |
| 455 | return ( $has_url ) ? $has_url : apply_filters( 'the_permalink', get_permalink() ); |
| 456 | } |
| 457 | |
| 458 | /** |
| 459 | * Extends the default WordPress body classes. |
| 460 | * |
| 461 | * Adds body classes to denote: |
| 462 | * 1. Single or multiple authors. |
| 463 | * 2. Active widgets in the sidebar to change the layout and spacing. |
| 464 | * 3. When avatars are disabled in discussion settings. |