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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 |
|---|---|
| 1045 | /** |
| 1046 | * Filters whether to show the Screen Options submit button. |
| 1047 | * |
| 1048 | * @since 4.4.0 |
| 1049 | * |
| 1050 | * @param bool $show_button Whether to show Screen Options submit button. |
| 1051 | * Default false. |
| 1052 | * @param WP_Screen $this Current WP_Screen instance. |
| 1053 | */ |
| 1054 | $show_button = apply_filters( 'screen_options_show_submit', false, $this ); |
| 1055 | |
| 1056 | if ( $show_button ) { |
| 1057 | submit_button( __( 'Apply' ), 'primary', 'screen-options-apply', true ); |
| 1058 | } |
| 1059 | |
| 1060 | echo $form_end . $wrapper_end; |
| 1061 | } |
| 1062 | |
| 1063 | /** |