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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 |
|---|---|
| 1734 | * @since 3.0.0 |
| 1735 | * @since 4.4.0 The `$option` parameter was added. |
| 1736 | * @since 4.7.0 The `$network_id` parameter was added. |
| 1737 | * |
| 1738 | * @param mixed $value New value of the network option. |
| 1739 | * @param mixed $old_value Old value of the network option. |
| 1740 | * @param string $option Option name. |
| 1741 | * @param int $network_id ID of the network. |
| 1742 | */ |
| 1743 | $value = apply_filters( "pre_update_site_option_{$option}", $value, $old_value, $option, $network_id ); |
| 1744 | |
| 1745 | /* |
| 1746 | * If the new and old values are the same, no need to update. |
| 1747 | * |
| 1748 | * Unserialized values will be adequate in most cases. If the unserialized |
| 1749 | * data differs, the (maybe) serialized data is checked to avoid |
| 1750 | * unnecessary database calls for otherwise identical object instances. |
| 1751 | * |
| 1752 | * See https://core.trac.wordpress.org/ticket/44956 |