CODE EXAMPLE FOR PHP

php array merge without array_merge

$arr1 = array("color1" => "red", "color2" => "blue");
$arr2 = array("color1" => "black", "color3" => "green");
$arr3 = $arr1 + $arr2; //result is array("color1" => "red", "color2" => "blue", "color3" => "green");