PHP Array Compare Merge, efficiency

PHP arrays

$arr 1 = Array (1, 3, 5, 9,34,128,129);
$arr 2 = Array (1, 3, 6, 22, 33, 128);
$arr 3 = array (128,78,56,33,5,1);

The desired result is:
$res = Array (1,128,3,5,33,9,34,129,6,22,78,56);

The rule is: Merge the 3 array, the highest repetition forward
$arr 1 $arr 2 $arr 3 must be desc or ASC.

If only $arr1 and $arr2 two, or a $arr4.
thanks~

Reply to discussion (solution)

$arr 1 = Array (1, 3, 5, 9,34,128,129), $arr 2 = Array (1, 3, 6, 22,33, +), $arr 3 = array (128,78,56,33,5,1); $t = Array_count_v Alues (Array_merge ($arr 1, $arr 2, $arr 3)), Arsort ($t);p Rint_r (Array_keys ($t));

Array
(
[0] = 1
[1] = 128
[2] = 5
[3] = 33
[4] = 3
[5] = 78
[6] = 56
[7] = 22
[8] = 129
[9] = 9
[Ten] + 34
[One] = 6
)
Only the interior function is fast, but it doesn't exactly match your requirements.
So I need to write some code myself.

$t = Array_count_values (Array_merge ($arr 1, $arr 2, $arr 3)), $res = Array (); for ($max =max ($t); $max >0; $max--)  $res = Array_merge ($res, Array_keys ($t, $max));p Rint_r ($res);

Array
(
[0] = 1
[1] = 128
[2] = 3
[3] = 5
[4] = 33
[5] = 9
[6] = 34
[7] = 129
[8] = 6
[9] = 22
[Ten] + 78
[One] = 56
)

Well, understand, or moderator to force AH ~ I also mechanically last night,
Array_diff not to force Ah, so so redundant

$arr 1 = Array (1,2,3,4,5,6,7,8,9,10), $arr 2 = Array (1,8,9,15,100), $arr 3 = Array (1,8,15,200), $res = Array (), $resHigh = AR Ray ();//height similar to $resmiddle = Array (),//$reslow = Array (),//Low $res = Array_merge ($arr 1, $arr 2, $arr 3); $res = My_array_unique ( $res);//exclude Duplicate $reshigh = Array_intersect ($arr 1, $arr 2, $arr 3);//Intersection $reslow = Array_merge (Array_diff ($arr 1, $arr 2, $arr 3), Array_diff ($arr 2, $arr 1, $arr 3), Array_diff ($arr 3, $arr 1, $arr 2));//combination difference Set $res = Array_diff ($res, $resHigh);//Exclude high$ Resmiddle = Array_diff ($res, $resLow);//Exclude Low$res = Array_merge ($resHigh, $resMiddle, $resLow); function My_array_   Unique ($array) {//exclude duplicate $out = Array ();        foreach ($array as $key = + $value) {if (!in_array ($value, $out)) {$out [$key] = $value; }} return $out;} echo "
";p Rint_r ($res); exit;/* (    [0] = 1    [1] = 8    [2] = 9    [3] =    [4] = 2    [5] = 3< C6/>[6] + 4    [7] = 5 [    8] = 6    [9] = 7    [Ten] =    [one] = [ten] = 200 )*/
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