Strip all elements from array where they occur less than twice

I have an array like this:

[0] = 2
[1] = 8
[2] = 7
[3] = 7

And I want to end up with an array that looks like:

[0] = 7
[1] = 7

Basically, remove all elements where they occur less than twice.

Is their a PHP function that can do this?


try this,

    foreach (array_count_values($ar1) as $k => $v) {
        if ($v > 1) {
            $ar2[] = $k;


Array ( [0] => 7 [1] => 7 )

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