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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 |
|---|---|
| 989 | * |
| 990 | * This filter is currently only used on the Widgets screen to enable |
| 991 | * accessibility mode. |
| 992 | * |
| 993 | * @since 3.0.0 |
| 994 | * |
| 995 | * @param string $screen_settings Screen settings. |
| 996 | * @param WP_Screen $this WP_Screen object. |
| 997 | */ |
| 998 | $this->_screen_settings = apply_filters( 'screen_settings', $this->_screen_settings, $this ); |
| 999 | |
| 1000 | if ( $this->_screen_settings || $this->_options ) |
| 1001 | $show_screen = true; |
| 1002 | |
| 1003 | /** |
| 1004 | * Filter whether to show the Screen Options tab. |
| 1005 | * |
| 1006 | * @since 3.2.0 |
| 1007 | * |