php array_merge associative arrays

Question

I\'m trying to prepend an item to the beginning of an associative array. I figured the best way to do this is to use array_merge, but I\'m having some odd consequences. I

Answer 1

You could use array operator: +

$products = array(0 => "Select a product" ) + $products;

it will do a union and only works when the keys don't overlap.