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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 |
|---|---|
| 307 | * @since 4.9.8 |
| 308 | * |
| 309 | * @param bool $allowed Whether the user can add the object meta. Default false. |
| 310 | * @param string $meta_key The meta key. |
| 311 | * @param int $object_id Object ID. |
| 312 | * @param int $user_id User ID. |
| 313 | * @param string $cap Capability name. |
| 314 | * @param string[] $caps Array of the user's capabilities. |
| 315 | */ |
| 316 | $allowed = apply_filters( "auth_{$object_type}_meta_{$meta_key}_for_{$object_subtype}", $allowed, $meta_key, $object_id, $user_id, $cap, $caps ); |
| 317 | } else { |
| 318 | |
| 319 | /** |
| 320 | * Filters whether the user is allowed to edit a specific meta key of a specific object type. |
| 321 | * |
| 322 | * Return true to have the mapped meta caps from `edit_{$object_type}` apply. |
| 323 | * |
| 324 | * The dynamic portion of the hook name, `$object_type` refers to the object type being filtered. |
| 325 | * The dynamic portion of the hook name, `$meta_key`, refers to the meta key passed to map_meta_cap(). |