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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 |
|---|---|
| 1013 | * @since 6.9.0 |
| 1014 | * |
| 1015 | * @param int $network_id ID of network to populate. |
| 1016 | * @param string $domain The domain name for the network. |
| 1017 | * @param string $email Email address for the network administrator. |
| 1018 | * @param string $site_name The name of the network. |
| 1019 | * @param string $path The path to append to the network's domain name. |
| 1020 | * @param bool $subdomain_install Whether the network is a subdomain installation or a subdirectory installation. |
| 1021 | */ |
| 1022 | do_action( 'before_populate_network', $network_id, $domain, $email, $site_name, $path, $subdomain_install ); |
| 1023 | |
| 1024 | $errors = new WP_Error(); |
| 1025 | if ( '' === $domain ) { |
| 1026 | $errors->add( 'empty_domain', __( 'You must provide a domain name.' ) ); |
| 1027 | } |
| 1028 | if ( '' === $site_name ) { |
| 1029 | $errors->add( 'empty_sitename', __( 'You must provide a name for your network of sites.' ) ); |
| 1030 | } |
| 1031 | |