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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 |
|---|---|
| 2260 | * is by design to maintain backwards-compatibility and guard against |
| 2261 | * potential type errors in PHP 8.1+. Non-boolean values (even falsey |
| 2262 | * and truthy values) will result in the function returning false. |
| 2263 | * |
| 2264 | * @since 5.9.0 |
| 2265 | * |
| 2266 | * @param bool $is_viewable Whether the post type is "viewable" (strict type). |
| 2267 | * @param WP_Post_Type $post_type Post type object. |
| 2268 | */ |
| 2269 | return true === apply_filters( 'is_post_type_viewable', $is_viewable, $post_type ); |
| 2270 | } |
| 2271 | |
| 2272 | /** |
| 2273 | * Determine whether a post status is considered "viewable". |
| 2274 | * |
| 2275 | * For built-in post statuses such as publish and private, the 'public' value will be evaluated. |
| 2276 | * For all others, the 'publicly_queryable' value will be used. |
| 2277 | * |
| 2278 | * @since 5.7.0 |