Array Operators

The only array operator in PHP is the + operator. It appends the right handed array to the left handed, whereas duplicated keys are NOT overwritten.

$a = array("a" =  "apple", "b" =  "banana");
$b = array("a" = "pear", "b" =  "strawberry", "c" =  "cherry");

$c = $a + $b;

var_dump($c);
array(3) {
  ["a"]= 
  string(5) "apple"
  ["b"]= 
  string(6) "banana"
  ["c"]= 
  string(6) "cherry"
}