WordPress at a glance
function is not described

wp_unregister_GLOBALS() WP 2.1.0

Turn register globals off.

No Hooks.

Return

Nothing (null).

Usage

wp_unregister_GLOBALS();

Code of wp unregister GLOBALS: wp-includes/load.php VER 5.0.3

<?php
function wp_unregister_GLOBALS() {
	if ( !ini_get( 'register_globals' ) )
		return;

	if ( isset( $_REQUEST['GLOBALS'] ) )
		die( 'GLOBALS overwrite attempt detected' );

	// Variables that shouldn't be unset
	$no_unset = array( 'GLOBALS', '_GET', '_POST', '_COOKIE', '_REQUEST', '_SERVER', '_ENV', '_FILES', 'table_prefix' );

	$input = array_merge( $_GET, $_POST, $_COOKIE, $_SERVER, $_ENV, $_FILES, isset( $_SESSION ) && is_array( $_SESSION ) ? $_SESSION : array() );
	foreach ( $input as $k => $v )
		if ( !in_array( $k, $no_unset ) && isset( $GLOBALS[$k] ) ) {
			unset( $GLOBALS[$k] );
		}
}