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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 |
|---|---|
| 1159 | case 'delete_post_meta': |
| 1160 | case 'add_post_meta': |
| 1161 | $post = get_post( $args[0] ); |
| 1162 | $post_type_object = get_post_type_object( $post->post_type ); |
| 1163 | $caps = map_meta_cap( $post_type_object->cap->edit_post, $user_id, $post->ID ); |
| 1164 | |
| 1165 | $meta_key = isset( $args[ 1 ] ) ? $args[ 1 ] : false; |
| 1166 | |
| 1167 | if ( $meta_key && has_filter( "auth_post_meta_{$meta_key}" ) ) { |
| 1168 | $allowed = apply_filters( "auth_post_meta_{$meta_key}", false, $meta_key, $post->ID, $user_id, $cap, $caps ); |
| 1169 | if ( ! $allowed ) |
| 1170 | $caps[] = $cap; |
| 1171 | } elseif ( $meta_key && is_protected_meta( $meta_key, 'post' ) ) { |
| 1172 | $caps[] = $cap; |
| 1173 | } |
| 1174 | break; |
| 1175 | case 'edit_comment': |
| 1176 | $comment = get_comment( $args[0] ); |
| 1177 | $post = get_post( $comment->comment_post_ID ); |