Prefixing array keys with a string (:) in PHP

Question

Quick one; I know a solution, but I\'m looking for something more elegant if it exists.

I\'m using PDO for prepeared statements:

$sql = \"INSERT INTO         


        

Answer 1

It has already been answered but this is what I came up with anyway.

$arr = array('foo'=>1,'bar'=>2);

$arr = array_flip($arr);

array_walk($arr,create_function('&$v,$k', '$v = ":$v";'));

$arr = array_flip($arr);

print_r($arr);