wpdb::get_blog_prefix( int $blog_id = null ): string

Gets blog prefix.

Contents

Parameters

$blog_id int Optional
Blog ID to retrieve the table prefix for.
Defaults to the current blog ID.

Default: null

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Return

string Blog prefix.

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Source

File: wp-includes/class-wpdb.php. View all references 

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;
	}
}

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Used By

Used By
Used By Description
wp_register_persisted_preferences_meta() wp-includes/user.php

Registers the user meta property for persisted preferences.
wp_initialize_site() wp-includes/ms-site.php

Runs the initialization routine for a given site.
wp_default_packages_inline_scripts() wp-includes/script-loader.php

Adds inline scripts required for the WordPress JavaScript packages.
WP_User::for_site() wp-includes/class-wp-user.php

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Sets blog ID.
Show 23 more used by Hide more used by

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Changelog

Changelog
Version Description
3.0.0 Introduced.

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User Contributed Notes

  1. Skip to note 1 content
    You must log in to vote on the helpfulness of this noteVote results for this note: 0You must log in to vote on the helpfulness of this note
    Contributed by shossain571 —

    Create a table while installing the plugin. Get the database table prefix with $wpdb->get_blog_prefix();

    register_activation_hook( __FILE__, 'myplugin_activation' );
function myplugin_activation() {
	// Get access to global database access class
	global $wpdb;
	// Create table on main blog in network mode or single blog
	myplugin_create_table( $wpdb->get_blog_prefix() );
}

function myplugin_create_table( $prefix ) {
	// Prepare SQL query to create database table
	// using function parameter
	$creation_query =
	'CREATE TABLE IF NOT EXISTS ' . $prefix . 'myplugin_bug_data (
	`bug_id` int(20) NOT NULL AUTO_INCREMENT,
	`bug_description` text,
	`bug_version` varchar(10) DEFAULT NULL,
	`bug_report_date` date DEFAULT NULL,
	`bug_status` int(3) NOT NULL DEFAULT 0,
	PRIMARY KEY (`bug_id`)
	);';
	global $wpdb;
	$wpdb->query( $creation_query );
}

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