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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 |
|---|---|
| 704 | * or the 'layout_columns' option. |
| 705 | * |
| 706 | * @see set_screen_options() |
| 707 | * |
| 708 | * @param mixed $screen_option The value to save instead of the option value. |
| 709 | * Default false (to skip saving the current option). |
| 710 | * @param string $option The option name. |
| 711 | * @param int $value The option value. |
| 712 | */ |
| 713 | $screen_option = apply_filters( 'set-screen-option', $screen_option, $option, $value ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores |
| 714 | } |
| 715 | |
| 716 | /** |
| 717 | * Filters a screen option value before it is set. |
| 718 | * |
| 719 | * The dynamic portion of the hook, `$option`, refers to the option name. |
| 720 | * |
| 721 | * Returning false from the filter will skip saving the current option. |
| 722 | * |