$json_file = file_get_contents("http://servidor.sys.net/sendsms?username=xxx&password=xxxx&phonenumber=999999999&message=ssssssss");

$json_str = json_decode($json_file, true);


var_dump( $json_str );

array(2) {
  ["message"]=>
  string(8) "ssssssss"
  ["report"]=>
  array(1) {
    [0]=>
    array(1) {
      [1]=>
      array(1) {
        [0]=>
        array(4) {
          ["port"]=>
          string(7) "gsm-2.2"
          ["phonenumber"]=>
          string(11) "999999999"
          ["time"]=>
          string(19) "2017-08-04 07:34:35"
          ["result"]=>
          string(7) "success"
        }
      }
    }
  }
}