Hello Abhist,

Thank you for posting. Please use the following code:

add_action( 'bp_set_member_type', function ( $user_id, $member_type ) {
	// $user_id     ID of the user whose member type has been updated.
	// $member_type The member type name or an array of member type names.

	$user = get_user_by( 'id', $user_id );

	if ( ! $user ) {
		return;
	}

	// Provide the email subject.
	$subject = '';

	// Provide the email message.
	$message = '';

	@wp_mail( $user->user_email, $subject, $message );
} );

Please check and let me know if it helps or not.

Regards
Ravi

Hello,

Try the following code:

add_action( 'bp_set_member_type', function ( $user_id, $member_type ) {
	// If message component not exists return.
	if ( ! bp_is_active( 'messages' ) ) {
		return;
	}

	// $user_id     ID of the user whose member type has been updated.
	// $member_type The member type name or an array of member type names.
	$user = get_user_by( 'id', $user_id );

	if ( ! $user ) {
		return;
	}

	// Provide the email subject.
	$subject = '';

	// Provide the email message.
	$message = '';

	// Send only if member type send by other user. You may skip this.
	if ( get_current_user_id() != $user->ID ) {
		messages_new_message(
			array(
				'sender_id'  => get_current_user_id(),
				'recipients' => array( $user->ID ),
				'subject'    => $subject,
				'content'    => $message,
			)
		);
	}
} );

Regards
Ravi

Hi,

You are welcome.

I am sorry, I lack the time to assist you further with custom code.

Please take a look at this page, especially the bottom links to see how to create BuddyPress Notifications.

https://codex.buddypress.org/administrator-guide/notifications/

Regards
Ravi