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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 |
|---|---|
| 3236 | * Filter the shortlink for a post. |
| 3237 | * |
| 3238 | * @since 3.0.0 |
| 3239 | * |
| 3240 | * @param string $shortlink Shortlink URL. |
| 3241 | * @param int $id Post ID, or 0 for the current post. |
| 3242 | * @param string $context The context for the link. One of 'post' or 'query', |
| 3243 | * @param bool $allow_slugs Whether to allow post slugs in the shortlink. Not used by default. |
| 3244 | */ |
| 3245 | return apply_filters( 'get_shortlink', $shortlink, $id, $context, $allow_slugs ); |
| 3246 | } |
| 3247 | |
| 3248 | /** |
| 3249 | * Inject rel=shortlink into head if a shortlink is defined for the current page. |
| 3250 | * |
| 3251 | * Attached to the wp_head action. |
| 3252 | * |
| 3253 | * @since 3.0.0 |
| 3254 | */ |