1-dimension arrays

// You can initialize an empty array 
$toto = array();

// Or just define its elements
$a[0] = "abc"; 
$a[1] = "def"; 
$b["foo"] = 13;
 
// It is possible to insert elements :
$a[] = "hello"; // $a[2] == "hello"
$a[] = "world"; // $a[3] == "world"