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

One liner...

$array = array('test'=>'55','yest'=>'66');

$array = array_flip(array_map(function($v){return ':' . $v;},array_flip($array)));

// array(':test'=>'55',':yest'=>'66');

However this isn't safe as array_flip relies on all values being unique.

So one of the looping solutions is probably the best, or alternatively array_keys with array_combine.