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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 |
|---|---|
| 639 | * @param int $user_id |
| 640 | */ |
| 641 | function grant_super_admin( $user_id ) { |
| 642 | global $super_admins; |
| 643 | |
| 644 | // If global super_admins override is defined, there is nothing to do here. |
| 645 | if ( isset($super_admins) ) |
| 646 | return false; |
| 647 | |
| 648 | do_action( 'grant_super_admin', $user_id ); |
| 649 | |
| 650 | // Directly fetch site_admins instead of using get_super_admins() |
| 651 | $super_admins = get_site_option( 'site_admins', array( 'admin' ) ); |
| 652 | |
| 653 | $user = new WP_User( $user_id ); |
| 654 | if ( ! in_array( $user->user_login, $super_admins ) ) { |
| 655 | $super_admins[] = $user->user_login; |
| 656 | update_site_option( 'site_admins' , $super_admins ); |
| 657 | do_action( 'granted_super_admin', $user_id ); |