将整数与多维数组进行比较

Question

我有以下数组和一个数字$num，我正在尝试检查每个元素的$num 是否等于或在from 和to 的范围内。如果条件为真，则应返回该数组的对应或键，并停止进一步比较。我可以使用array_walk 实现这一点，但无法停止进一步比较

Array
(
    [_1395216158966_966] => Array
        (
            [from] => 1
            [to] => 3
            [rate] => 10
        )

    [_1395216219094_94] => Array
        (
            [from] => 3
            [to] => 6
            [rate] => 15
        )

    [_1395216219662_662] => Array
        (
            [from] => 6
            [to] => 9
            [rate] => 20
        )

)

当前代码

array_walk($data, array($this, 'CalculateWeightCharge'), $weight)

public function CalculateWeightCharge($data, $needle, $num)
    {

        if($num >= $data['from'] && $num <= $data['to']){
            return true;
        }

    }

Answer 1

function fn($numbers, $num)
{
    foreach($numbers as $key=>$val)
    {
         if($num >= $val["from"] && $num <= $val["to"])
         {
            return $key;
         }
    }

    return null;
}

Answer 2

function compare($array, $num) {
    foreach ($array as $key => $value) {
        if ($num >= $value['from'] && $num <= $value['to']) // any condition here
            return $key;
    }
    return null;
}

Answer 3

下面是检查$num是否在$array数组的每个范围内的代码：

$result = array_filter($array, function ($v) use($num) {
    return $num >= $v['from'] && $num <= $v['to'];
})
if (count($result) == count($array)) echo 'TRUE';