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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 |
|---|---|
| 5462 | /** |
| 5463 | * Filters the capability to read private posts for a custom post type |
| 5464 | * when generating SQL for getting posts by author. |
| 5465 | * |
| 5466 | * @since 2.2.0 |
| 5467 | * @deprecated 3.2.0 The hook transitioned from "somewhat useless" to "totally useless". |
| 5468 | * |
| 5469 | * @param string $cap Capability. |
| 5470 | */ |
| 5471 | if ( ! $cap = apply_filters( 'pub_priv_sql_capability', '' ) ) { |
| 5472 | $cap = current_user_can( $post_type_obj->cap->read_private_posts ); |
| 5473 | } |
| 5474 | |
| 5475 | // Only need to check the cap if $public_only is false. |
| 5476 | $post_status_sql = "post_status = 'publish'"; |
| 5477 | if ( false === $public_only ) { |
| 5478 | if ( $cap ) { |
| 5479 | // Does the user have the capability to view private posts? Guess so. |
| 5480 | $post_status_sql .= " OR post_status = 'private'"; |