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wpdb::get_blog_prefix( int $blog_id = null )

Gets blog prefix.

Parameters

$blog_id

(int) (Optional)

Default value: null

Return

(string) Blog prefix.

Source

File: wp-includes/wp-db.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;
		}
	}

Uses

Uses Description
wp-includes/load.php: is_multisite()

If Multisite is enabled.

Used By

Used By Description
wp-includes/ms-site.php: wp_initialize_site()

Runs the initialization routine for a given site.
wp-includes/class-wp-user.php: WP_User::for_site()

Sets the site to operate on. Defaults to the current site.
wp-includes/class-wp-roles.php: WP_Roles::for_site()

Sets the site to operate on. Defaults to the current site.
wp-includes/user.php: wp_get_users_with_no_role()

Get the user IDs of all users with no role on this site.
wp-admin/includes/deprecated.php: get_author_user_ids()

Get all user IDs.
wp-admin/includes/deprecated.php: get_editable_user_ids()

Gets the IDs of any users who can edit posts.
wp-admin/includes/deprecated.php: get_nonauthor_user_ids()

Gets all users who are not authors.
wp-includes/class-wp-user.php: WP_User::update_user_level_from_caps()

Update the maximum user level for the user.
wp-includes/class-wp-user.php: WP_User::remove_all_caps()

Remove all of the capabilities of the user.
wp-includes/class-wp-user.php: WP_User::_init_caps()

Set up capability object properties.
wp-includes/deprecated.php: get_users_of_blog()

Get users for the site.
wp-includes/class-wp-user-query.php: WP_User_Query::prepare_query()

Prepare the query variables.
wp-includes/user.php: update_user_option()

Update user option with global blog capability.
wp-includes/user.php: delete_user_option()

Delete user option with global blog capability.
wp-includes/user.php: count_users()

Count number of users who have each of the user roles.
wp-includes/user.php: get_user_option()

Retrieve user option that can be either per Site or per Network.
wp-includes/ms-deprecated.php: is_user_option_local()

Check whether a usermeta key has to do with the current blog.
wp-includes/ms-functions.php: get_most_recent_post_of_user()

Get a user’s most recent post.
wp-includes/ms-deprecated.php: install_blog()

Install an empty blog.
wp-includes/ms-functions.php: wpmu_validate_blog_signup()

Processes new site registrations.
wp-includes/ms-deprecated.php: get_blog_list()

Deprecated functionality to retrieve a list of all sites.
wp-includes/ms-blogs.php: switch_to_blog()

Switch the current blog.
wp-includes/ms-blogs.php: restore_current_blog()

Restore the current blog, after calling switch_to_blog().
wp-includes/wp-db.php: wpdb::tables()

Returns an array of WordPress tables.
wp-includes/wp-db.php: wpdb::set_prefix()

Sets the table prefix for the WordPress tables.
wp-includes/wp-db.php: wpdb::set_blog_id()

Sets blog ID.

Changelog

Version Description
3.0.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/classes/wpdb/get_blog_prefix