如何通过组合两个相同的数组值来生成唯一的数组？

Suppose, I have an array

$array1 = array(10, 20);

and another array of same values as above

$array2 = array(10, 20);

I want to combine these two arrays and generate an array with unique key and value pair. I want $array3 output to be like this:

$array3 = array(10 => 20, 20 => 10)

I tried shuffling the second array ($array2), sometimes it gives me the same values as first one($array1). And my $array3 output is:

$array3 = array(10 => 10, 20 => 20)

array_combine($array1, array_reverse($array2));

That will achieve the $array3 that you specified in the example you provided, but in general will not work unless $array1 and $array2 have the same number of values.

I'm a little confused about what you really need. Can you provide another example with more keys / values?