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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 |
|---|---|
| 1306 | |
| 1307 | /** |
| 1308 | * Filters the post types that have different view mode options. |
| 1309 | * |
| 1310 | * @since 4.4.0 |
| 1311 | * |
| 1312 | * @param string[] $view_mode_post_types Array of post types that can change view modes. |
| 1313 | * Default post types with show_ui on. |
| 1314 | */ |
| 1315 | $view_mode_post_types = apply_filters( 'view_mode_post_types', $view_mode_post_types ); |
| 1316 | |
| 1317 | if ( 'edit' === $screen->base && ! in_array( $this->post_type, $view_mode_post_types, true ) ) { |
| 1318 | return; |
| 1319 | } |
| 1320 | |
| 1321 | if ( ! isset( $mode ) ) { |
| 1322 | $mode = get_user_setting( 'posts_list_mode', 'list' ); |
| 1323 | } |
| 1324 | |