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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 |
|---|---|
| 4147 | * Filters the shortlink for a post. |
| 4148 | * |
| 4149 | * @since 3.0.0 |
| 4150 | * |
| 4151 | * @param string $shortlink Shortlink URL. |
| 4152 | * @param int $id Post ID, or 0 for the current post. |
| 4153 | * @param string $context The context for the link. One of 'post' or 'query', |
| 4154 | * @param bool $allow_slugs Whether to allow post slugs in the shortlink. Not used by default. |
| 4155 | */ |
| 4156 | return apply_filters( 'get_shortlink', $shortlink, $id, $context, $allow_slugs ); |
| 4157 | } |
| 4158 | |
| 4159 | /** |
| 4160 | * Injects rel=shortlink into the head if a shortlink is defined for the current page. |
| 4161 | * |
| 4162 | * Attached to the {@see 'wp_head'} action. |
| 4163 | * |
| 4164 | * @since 3.0.0 |
| 4165 | */ |