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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 |
|---|---|
| 556 | /** |
| 557 | * Fires after the value of an option has been successfully updated. |
| 558 | * |
| 559 | * @since 2.9.0 |
| 560 | * |
| 561 | * @param string $option Name of the updated option. |
| 562 | * @param mixed $old_value The old option value. |
| 563 | * @param mixed $value The new option value. |
| 564 | */ |
| 565 | do_action( 'updated_option', $option, $old_value, $value ); |
| 566 | |
| 567 | return true; |
| 568 | } |
| 569 | |
| 570 | /** |
| 571 | * Adds a new option. |
| 572 | * |
| 573 | * You do not need to serialize values. If the value needs to be serialized, |
| 574 | * then it will be serialized before it is inserted into the database. |