Remove Excessive White Spaces from String / Object

function remove_white_spaces( $string = '', $true_trim = true ) {

  $return = '';

  if ( !empty( $string ) ) {

    if ( is_string( $string ) ) {

      $return = preg_replace( '/\s\s+/', ' ', $string );

      if( $true_trim ) {

        $return = trim( $return );
      }

    } else { // is_string

      return array_map( __FUNCTION__ , $string );

    }

  } // empty

  return $return;
}