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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 |
|---|---|
| 819 | * |
| 820 | * @param string|bool $domain Site domain. |
| 821 | * @param string $path Site path. |
| 822 | * @param string $title Site title. |
| 823 | * @param string $user_login User login name. |
| 824 | * @param string $user_email User email address. |
| 825 | * @param string $key Activation key created in wpmu_signup_blog(). |
| 826 | * @param array $meta Signup meta data. By default, contains the requested privacy setting and lang_id. |
| 827 | */ |
| 828 | if ( ! apply_filters( 'wpmu_signup_blog_notification', $domain, $path, $title, $user_login, $user_email, $key, $meta ) ) { |
| 829 | return false; |
| 830 | } |
| 831 | |
| 832 | // Send email with activation link. |
| 833 | if ( !is_subdomain_install() || get_current_network_id() != 1 ) |
| 834 | $activate_url = network_site_url("wp-activate.php?key=$key"); |
| 835 | else |
| 836 | $activate_url = "http://{$domain}{$path}wp-activate.php?key=$key"; // @todo use *_url() API |
| 837 | |