[RESOLVED] array_flip question

[activomate]

I hope that I'm not doing something completely lame here...

I'm attempting to utilize the array_flip() function and it appears that the very first key/value is being left off? Below is the code and some output to view:

print_r($HTTP_POST_VARS);

print_r(array_flip($HTTP_POST_VARS));

Array ( [44] => 28 [46] => 28 [50] => 30 [51] => 9 [Submit] => 1 )

Array ( [28] => 46 [30] => 50 [9] => 51 [1] => Submit )

Thanks!

[HalfaBee]

You have two values that are the same, so when you flip it, you end up with 2 array keys of 28, so you only get 1 [28].
In my opinion, don't do it.

[activomate]

Thanks for pointing that out!!

Is there anything that I can utilize to flip without losing duplicate values...I tried utilizing a function provided within the manual...

In case anyone wants a function that doesn't lose duplicates:

function array_invert($arr)
{
$res = Array();
foreach(array_keys($arr) as $key)
{
if (!array_key_exists($arr[$key], $res)) $res[$arr[$key]] = Array();
array_push($res[$arr[$key]], $key);
}
return $res;
}

However, when I execute my array against this function, I'm getting unexpected results...

Array ( [56] => Array ( [0] => 48 ) [28] => Array ( [0] => 49 ) [30] => Array ( [0] => 50 ) [27] => Array ( [0] => 51 ) [1] => Array ( [0] => Submit ) )

[activomate]

I think I get it now...The problem is that you can't have two elements with the same key. I'll have to think of some work around.