WC_Validation::format_phone PHP Method

    public static function format_phone($tel)
    {
        return wc_format_phone_number($tel);
    }

 /**
  * Test format_phone().
  *
  * @since 2.4
  */
 public function test_format_phone()
 {
     $this->assertEquals('+00-000-00-00-000', WC_Validation::format_phone('+00.000.00.00.000'));
     $this->assertEquals('+00 000 00 00 000', WC_Validation::format_phone('+00 000 00 00 000'));
 }