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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 |
|---|---|
| 1083 | /** |
| 1084 | * Filters whether to show the Screen Options submit button. |
| 1085 | * |
| 1086 | * @since 4.4.0 |
| 1087 | * |
| 1088 | * @param bool $show_button Whether to show Screen Options submit button. |
| 1089 | * Default false. |
| 1090 | * @param WP_Screen $screen Current WP_Screen instance. |
| 1091 | */ |
| 1092 | $show_button = apply_filters( 'screen_options_show_submit', false, $this ); |
| 1093 | |
| 1094 | if ( $show_button ) { |
| 1095 | submit_button( __( 'Apply' ), 'primary', 'screen-options-apply', true ); |
| 1096 | } |
| 1097 | |
| 1098 | echo $form_end . $wrapper_end; |
| 1099 | } |
| 1100 | |
| 1101 | /** |