wpdb::get_blog_prefix │ public │ WP 3.0.0

Gets blog prefix.

Method of the class: wpdb{}

No Hooks.

Returns

String. Blog prefix.

Usage

global $wpdb;
$wpdb->get_blog_prefix( $blog_id );
$blog_id(int)
Blog ID to retrieve the table prefix for.
Default: current blog ID

Changelog

Since 3.0.0 Introduced.

wpdb::get_blog_prefix() code WP 6.9.1

wp-includes/class-wpdb.php 
public function get_blog_prefix( $blog_id = null ) {
	if ( is_multisite() ) {
		if ( null === $blog_id ) {
			$blog_id = $this->blogid;
		}

		$blog_id = (int) $blog_id;

		if ( defined( 'MULTISITE' ) && ( 0 === $blog_id || 1 === $blog_id ) ) {
			return $this->base_prefix;
		} else {
			return $this->base_prefix . $blog_id . '_';
		}
	} else {
		return $this->base_prefix;
	}
}