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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 |
|---|---|
| 1449 | * The dynamic portion of the hook name, `$option`, refers to the option name. |
| 1450 | * |
| 1451 | * @since 2.9.0 As "update_site_option_{$key}" |
| 1452 | * @since 3.0.0 |
| 1453 | * |
| 1454 | * @param string $option Name of the network option. |
| 1455 | * @param mixed $value Current value of the network option. |
| 1456 | * @param mixed $old_value Old value of the network option. |
| 1457 | */ |
| 1458 | do_action( 'update_site_option_' . $option, $option, $value, $old_value ); |
| 1459 | |
| 1460 | /** |
| 1461 | * Fires after the value of a network option has been successfully updated. |
| 1462 | * |
| 1463 | * @since 3.0.0 |
| 1464 | * |
| 1465 | * @param string $option Name of the network option. |
| 1466 | * @param mixed $value Current value of the network option. |
| 1467 | * @param mixed $old_value Old value of the network option. |