Just testing a sub domain...

Do I know where I am?

zum-online.de

And what is my IP?

82.165.82.162

Making some adjustments!

Charset Name: utf8

Get charset:  
object(stdClass)#2 (8) {
  ["charset"]=>
  string(4) "utf8"
  ["collation"]=>
  string(15) "utf8_general_ci"
  ["dir"]=>
  string(0) ""
  ["min_length"]=>
  int(1)
  ["max_length"]=>
  int(3)
  ["number"]=>
  int(33)
  ["state"]=>
  int(1)
  ["comment"]=>
  string(13) "UTF-8 Unicode"
}

Reset result: 1
Charset Name: utf8mb4

Get charset:  
object(stdClass)#2 (8) {
  ["charset"]=>
  string(7) "utf8mb4"
  ["collation"]=>
  string(18) "utf8mb4_general_ci"
  ["dir"]=>
  string(0) ""
  ["min_length"]=>
  int(1)
  ["max_length"]=>
  int(4)
  ["number"]=>
  int(45)
  ["state"]=>
  int(1)
  ["comment"]=>
  string(13) "UTF-8 Unicode"
}

Using FILTER_SANITIZE_EMAIL and FILTER_VALIDATE_EMAIL

bob+example@example.com