json_encode

string json_encode ( mixed $wartosc )

Converts the argument to JSON.

Example:

$a = array();
$a["imie"] = "Marek";
$a["nazwisko"] = "Kowalski";
$a["wiek"] = 20;

print(json_encode($a));

Result:

{"imie":"Marek","nazwisko":"Kowalski","wiek":20}