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From: tedd on 14 Apr 2010 13:20
At 9:37 AM -0600 4/14/10, Ashley M. Kirchner wrote:
>No because that only does a one-way comparison. It only tells me what's
>missing from $array2. I need it from both arrays. That's why I'm comparing
>1 versus 2, then 2 versus 1, and then doing a merge/unique on the result.
>
>-snip-
> $array1 = array(1, 2, 3, 4, 5, 6);
> $array2 = array(1, 3, 2, 8, 9);
> $diff1 = array_diff($array1, $array2);
> $diff2 = array_diff($array2, $array1);
> $result = array_unique(array_merge($diff1, $diff2));
>
> => (4, 5, 6, 8, 9)
>
>This second $result is what I want. So far I haven't noticed any problems
>doing it this way ... yet. I'm sure someone will tell me otherwise.
>
>Ash

Ash:

Looks good to me. But note the indexes of the result.

You might want to:

$array1 = array(1, 2, 3, 4, 5, 6, 7, 7, 7, 7);
$array2 = array(1, 2, 3, 8, 9);
$diff1 = array_diff($array1, $array2);
$diff2 = array_diff($array2, $array1);

$diff1 = array_unique($diff1);
$diff2 = array_unique($diff2);
$result = array_merge($diff1, $diff2);

Cheers,

tedd

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