php - 数组php中重复值的计数

Question

我有这个数组:

Array ( [0] => Array ( [Num] => 2 ) [1] => Array ( [Num] => 3 ) [2] => Array ( [Num] => 13 ) [3] => Array ( [Num] => 2 ) [4] => Array ( [Num] => 3 ) [5] => Array ( [Num] => 3 ) [6] => Array ( [Num] => 1 ) [7] => Array ( [Num] => 44 ) ) 

我想获取重复值的数量，例如该数组有 5 个重复值。这个问题的简单方法？？帮助我!

php代码:

$count = 0;
$temp = array();
for($i=0;$i<=sizeof($Num);$i++){
    for($j=$i+1;$j<=sizeof($Num);$j++){
        if($Num[$i]==$Num[$j]){
            $count++;
            $temp[]=$Num[$j];
        }
    }
}
var_dump($temp);
echo $count;

Answer 1

没有花哨的东西就解决了它，但它应该可以工作:

/**
 * Check if value exists in array
 */
function value_exists($array, $value) {
    $count = 0;
    foreach($array as $v) {
        if($v['Num'] == $value) {
            $count++;
        }
    }
    if ($count > 1) {
        return $count;
    }
}

$duplicated = array();
foreach ($Num as $key => $array ) {
    if($count = value_exists($Num, $array['Num'] )) {
        $duplicated[] = $array['Num'];
    }
}

echo 'Duplicated: ' . count($duplicated);