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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 |
|---|---|
| 6321 | /** |
| 6322 | * Filters the capability to read private posts for a custom post type |
| 6323 | * when generating SQL for getting posts by author. |
| 6324 | * |
| 6325 | * @since 2.2.0 |
| 6326 | * @deprecated 3.2.0 The hook transitioned from "somewhat useless" to "totally useless". |
| 6327 | * |
| 6328 | * @param string $cap Capability. |
| 6329 | */ |
| 6330 | $cap = apply_filters( 'pub_priv_sql_capability', '' ); |
| 6331 | if ( ! $cap ) { |
| 6332 | $cap = current_user_can( $post_type_obj->cap->read_private_posts ); |
| 6333 | } |
| 6334 | |
| 6335 | // Only need to check the cap if $public_only is false. |
| 6336 | $post_status_sql = "post_status = 'publish'"; |
| 6337 | if ( false === $public_only ) { |
| 6338 | if ( $cap ) { |
| 6339 | // Does the user have the capability to view private posts? Guess so. |