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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 |
|---|---|
| 5592 | } |
| 5593 | |
| 5594 | /** |
| 5595 | * Filters the main network ID. |
| 5596 | * |
| 5597 | * @since 4.3.0 |
| 5598 | * |
| 5599 | * @param int $main_network_id The ID of the main network. |
| 5600 | */ |
| 5601 | return (int) apply_filters( 'get_main_network_id', $main_network_id ); |
| 5602 | } |
| 5603 | |
| 5604 | /** |
| 5605 | * Determine whether global terms are enabled. |
| 5606 | * |
| 5607 | * @since 3.0.0 |
| 5608 | * |
| 5609 | * @return bool True if multisite and global terms enabled. |
| 5610 | */ |