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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 |
|---|---|
| 5680 | } |
| 5681 | |
| 5682 | /** |
| 5683 | * Filters the main network ID. |
| 5684 | * |
| 5685 | * @since 4.3.0 |
| 5686 | * |
| 5687 | * @param int $main_network_id The ID of the main network. |
| 5688 | */ |
| 5689 | return (int) apply_filters( 'get_main_network_id', $main_network_id ); |
| 5690 | } |
| 5691 | |
| 5692 | /** |
| 5693 | * Determine whether global terms are enabled. |
| 5694 | * |
| 5695 | * @since 3.0.0 |
| 5696 | * |
| 5697 | * @return bool True if multisite and global terms enabled. |
| 5698 | */ |