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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 |
---|---|
5349 | /** |
5350 | * Filter the capability to read private posts for a custom post type |
5351 | * when generating SQL for getting posts by author. |
5352 | * |
5353 | * @since 2.2.0 |
5354 | * @deprecated 3.2.0 The hook transitioned from "somewhat useless" to "totally useless". |
5355 | * |
5356 | * @param string $cap Capability. |
5357 | */ |
5358 | if ( ! $cap = apply_filters( 'pub_priv_sql_capability', '' ) ) { |
5359 | $cap = $post_type_obj->cap->read_private_posts; |
5360 | } |
5361 |
|
5362 | $sql = $wpdb->prepare( 'post_type = %s', $post_type ); |
5363 |
|
5364 | if ( null !== $post_author ) { |
5365 | $sql .= $wpdb->prepare( ' AND post_author = %d', $post_author ); |
5366 | } |
5367 |
|