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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 |
|---|---|
| 3047 | * Filter the shortlink for a post. |
| 3048 | * |
| 3049 | * @since 3.0.0 |
| 3050 | * |
| 3051 | * @param string $shortlink Shortlink URL. |
| 3052 | * @param int $id Post ID, or 0 for the current post. |
| 3053 | * @param string $context The context for the link. One of 'post' or 'query', |
| 3054 | * @param bool $allow_slugs Whether to allow post slugs in the shortlink. Not used by default. |
| 3055 | */ |
| 3056 | return apply_filters( 'get_shortlink', $shortlink, $id, $context, $allow_slugs ); |
| 3057 | } |
| 3058 | |
| 3059 | /** |
| 3060 | * Inject rel=shortlink into head if a shortlink is defined for the current page. |
| 3061 | * |
| 3062 | * Attached to the wp_head action. |
| 3063 | * |
| 3064 | * @since 3.0.0 |
| 3065 | * |