WordPress at a glance
function is not described

insert_blog() WP 3.0.0

Deprecated in 5.1.0. It is no longer supported and can be removed in future releases. Use `wp_insert_site()` instead.

Store basic site info in the blogs table.

This function creates a row in the wp_blogs table and returns the new blog's ID. It is the first step in creating a new blog.

  • See: wp_insert_site()

No Hooks.

Return

Int/false. The ID of the new row

Usage

insert_blog( $domain, $path, $site_id );
$domain(string) (required)
The domain of the new site.
$path(string) (required)
The path of the new site.
$site_id(int) (required)
Unless you're running a multi-network install, be sure to set this value to 1.

Code of insert blog: wp-includes/ms-deprecated.php VER 5.1.1

<?php
function insert_blog($domain, $path, $site_id) {
	_deprecated_function( __FUNCTION__, '5.1.0', 'wp_insert_site()' );

	$data = array(
		'domain'  => $domain,
		'path'    => $path,
		'site_id' => $site_id,
	);

	$site_id = wp_insert_site( $data );
	if ( is_wp_error( $site_id ) ) {
		return false;
	}

	clean_blog_cache( $site_id );

	return $site_id;
}