Get values of array that are 4 times duplicated

[system]

Hi all,

I hope I can explain my problem. I have 4 different arrays with numeric values (3, 7, 63 etc), but of course I could merge them into one. I need to check which values are present in each array (which values have 4 duplicates). I want to keep an array with all of the values that meet this requirement without duplicates.

I have found some ways to compare arrays, but I’m struggling with the fact that I have 4 arrays and that I’m not looking for ‘double’ duplicates but for ‘quadruple’ duplicates.

Who can send me in the right direction? Thanks!

[spring]

Loop through your array and compare each value

[mdahlke]

This may not be the most efficient way but it gets the job done.

[php]

<?php $arrayOne = array(12,123,32,11,22); $arrayTwo = array(12,454,32,11,95); $arrayThree = array(12, 49,302,11,22); $arrayFour = array(12,34,32,22,11); $arrayHolder = array($arrayOne, $arrayTwo, $arrayThree, $arrayFour); $numberArray = array(); foreach($arrayHolder as $array){ foreach($array as $number){ if(!isset($numberArray[$number])){ $numberArray[$number] = array('count' => 1); } else { $numberArray[$number]['count'] = $numberArray[$number]['count'] + 1; } } } $newArray = array(); foreach($numberArray as $num => $val ){ $newArray[] = $num; } echo '

';
print_r($numberArray);

echo '
New Array:
';
print_r($newArray);
echo '

'; ?>

[/php]