is_super_admin( int $user_id = false )

Determine if user is a site admin.

Parameters

$user_id

(Optional) (Optional) The ID of a user. Defaults to the current user.

Default value: false

Return

(bool) True if the user is a site admin.

Source

File: wp-includes/capabilities.php 

function is_super_admin( $user_id = false ) {
	if ( ! $user_id || $user_id == get_current_user_id() )
		$user = wp_get_current_user();
	else
		$user = get_userdata( $user_id );

	if ( ! $user || ! $user->exists() )
		return false;

	if ( is_multisite() ) {
		$super_admins = get_super_admins();
		if ( is_array( $super_admins ) && in_array( $user->user_login, $super_admins ) )
			return true;
	} else {
		if ( $user->has_cap('delete_users') )
			return true;
	}

	return false;
}

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Related

Used By

Used By
Used By Description
wp-includes/class-wp-user.php: WP_User::has_cap()

Whether the user has a specific capability.
wp-includes/ms-load.php: ms_site_check()

Checks status of current blog.
wp-includes/capabilities.php: map_meta_cap()

Map meta capabilities to primitive capabilities.
wp-includes/ms-deprecated.php: is_site_admin()

Determine if user is a site admin.
wp-includes/ms-functions.php: wpmu_create_blog()

Create a site.
wp-admin/includes/class-wp-ms-users-list-table.php: WP_MS_Users_List_Table::column_cb()

Handles the checkbox column output.
wp-admin/includes/upgrade.php: wp_install_defaults()

Creates the initial content for a newly-installed site.
Show 2 more used by Hide more used by

Changelog

Changelog
Version Description
WP-3.0.0 Introduced.