Function and usage of newblog_notify_siteadmin() in wordpress


Answers ( 1 )


    The newblog_notify_siteadmin() function in WordPress is used for notifying the network administrator when a new site is activated in a WordPress multisite network. This function is particularly relevant in environments where multiple sites are managed under a single WordPress installation.

    Function Signature:

    newblog_notify_siteadmin( WP_Site|int $blog_id, string $deprecated = '' ): bool

    Function Details:

    1. Purpose:

      • To send a notification to the network admin whenever a new site is created and activated within the WordPress multisite network.
    2. Description:

      • This function triggers an email notification to the network admin.
      • It can be customized using the newblog_notify_siteadmin filter, allowing developers to modify the content of the notification email.
    3. Parameters:

      • $blog_id (WP_Site|int): This is a required parameter. It can either be the object of the new site (WP_Site object) or the ID of the new site (integer). This identifies which site the notification is about.
      • $deprecated (string): This is an optional parameter, currently not used in the function. By default, it's an empty string. Its presence is mainly for backward compatibility.
    4. Return Value:

      • The function returns a boolean (bool):
        • true if the notification email was successfully sent.
        • false if the email failed to send.

    Sample Usage:

    // Example of using the function
    $site_id = 123; // Suppose 123 is the ID of the newly created site
    $email_sent = newblog_notify_siteadmin($site_id);
    if ($email_sent) {
        echo "Notification sent to the network admin.";
    } else {
        echo "Failed to send notification.";

    In this example, the function newblog_notify_siteadmin() is called with the ID of the new site. It sends a notification to the network admin. The function's return value is then checked to determine if the email was sent successfully.

    Customizing the Notification Email:

    To customize the content of the notification email, you can hook into the newblog_notify_siteadmin filter. This allows you to modify the email's content before it is sent out.


    • This function is specific to WordPress multisite installations.
    • It is a part of the WordPress core and is generally used by developers in plugins or themes that need to perform actions when a new site is created in a multisite network.
    • Always ensure to check for the existence of this function or multisite features before using it to avoid errors in single-site installations.

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