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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 |
|---|---|
| 1638 | * @since 2.9.0 As "update_site_option_{$key}" |
| 1639 | * @since 3.0.0 |
| 1640 | * @since 4.7.0 The `$network_id` parameter was added. |
| 1641 | * |
| 1642 | * @param string $option Name of the network option. |
| 1643 | * @param mixed $value Current value of the network option. |
| 1644 | * @param mixed $old_value Old value of the network option. |
| 1645 | * @param int $network_id ID of the network. |
| 1646 | */ |
| 1647 | do_action( "update_site_option_{$option}", $option, $value, $old_value, $network_id ); |
| 1648 | |
| 1649 | /** |
| 1650 | * Fires after the value of a network option has been successfully updated. |
| 1651 | * |
| 1652 | * @since 3.0.0 |
| 1653 | * @since 4.7.0 The `$network_id` parameter was added. |
| 1654 | * |
| 1655 | * @param string $option Name of the network option. |
| 1656 | * @param mixed $value Current value of the network option. |