PHP计算二维数组指定元素的和

Posted 2020-11-24 在斑马线上散布

array_sum(array_column($arr, ‘num‘));

//计算二维数组指定元素的和
$arr = [
    [
        ‘id‘=>1,
        ‘num‘=>3,
    ],
    [
        ‘id‘=>2,
        ‘num‘=>4,
    ],
    [
        ‘id‘=>3,
        ‘num‘=>1,
    ],
];
//计算二维数组指定元素的和
$arr = array_sum(array_column($arr, ‘num‘));//输出8
var_dump($arr);