int(12)

float(3.140000000000000124344978758017532527446746826171875)

string(5) "hallo"

bool(true)

array(3) {
  [0]=>
  int(123)
  [1]=>
  string(5) "Hallo"
  [2]=>
  float(3.141592653589793115997963468544185161590576171875)
}

Hallo Walter
strtoupper Funktion:
strtoupper(hallo)
Länge des Strings 'Hello world':
11

Auto Tomate Karotte Birne Gurke Kiwi Zuchini Traube Litchi Scratch1

String to Array:
Array
(
    [0] => Auto
    [1] => Tomate
    [2] => Karotte
    [3] => Birne
    [4] => Gurke
    [5] => Kiwi
    [6] => Zuchini
    [7] => Traube
    [8] => Litchi
    [9] => Scratch
)
1

itchi & Scratchi