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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 |
|---|---|
| 886 | switch ( $this->id ) { |
| 887 | case 'widgets': |
| 888 | $this->_screen_settings = '<p><a id="access-on" href="widgets.php?widgets-access=on">' . __('Enable accessibility mode') . '</a><a id="access-off" href="widgets.php?widgets-access=off">' . __('Disable accessibility mode') . "</a></p>\n"; |
| 889 | break; |
| 890 | default: |
| 891 | $this->_screen_settings = ''; |
| 892 | break; |
| 893 | } |
| 894 | |
| 895 | $this->_screen_settings = apply_filters( 'screen_settings', $this->_screen_settings, $this ); |
| 896 | |
| 897 | if ( $this->_screen_settings || $this->_options ) |
| 898 | $show_screen = true; |
| 899 | |
| 900 | $this->_show_screen_options = apply_filters( 'screen_options_show_screen', $show_screen, $this ); |
| 901 | return $this->_show_screen_options; |
| 902 | } |
| 903 | |
| 904 | /** |