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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 |
|---|---|
| 4446 | } |
| 4447 | |
| 4448 | /** |
| 4449 | * Filters the main network ID. |
| 4450 | * |
| 4451 | * @since 4.3.0 |
| 4452 | * |
| 4453 | * @param int $main_network_id The ID of the main network. |
| 4454 | */ |
| 4455 | return (int) apply_filters( 'get_main_network_id', $main_network_id ); |
| 4456 | } |
| 4457 | |
| 4458 | /** |
| 4459 | * Determine whether global terms are enabled. |
| 4460 | * |
| 4461 | * @since 3.0.0 |
| 4462 | * |
| 4463 | * @staticvar bool $global_terms |
| 4464 | * |