function getvar( $name ) {
    return empty( $_GET[ $name ] ) ? null : get_magic_quotes_gpc() ? stripslashes( $_GET[ $name ] ) : $_GET[ $name ];
}

if ( getvar( 'number' ) && ( getvar( 'delete' ) == 'yes' ) ) {
    deleteExtension( $adminDB, getvar( 'number' ) );
}