Php 比较两个多维数组并在新数组中输出结果

我有两个阵列：

Array 
( 
    [0] => Array 
        ( 
            [passers] => 6423 
            [gdat] => 2019-02-06 
        ) 
    [1] => Array 
        ( 
            [passers] => 9700
            [gdat] => 2019-02-07 
        ) 
    [2] => Array 
        ( 
            [passers] => 12559
            [gdat] => 2019-02-08 
        )
)

Array 
( 
    [0] => Array 
        ( 
            [passers] => 6423 
            [gdat] => 2019-02-06 
        ) 
    [1] => Array 
        ( 
            [passers] => 9604 
            [gdat] => 2019-02-07 
        ) 
    [2] => Array 
        ( 
            [passers] => 11559 
            [gdat] => 2019-02-08 
        )
)

第一个数组中的

[passers]

值将始终大于第二个数组中的值，因为两个数组中的

[gdat]

值始终相同

我需要比较两个

[passers]

的值，并将结果输出到一个新数组中：

Array 
( 
    [0] => Array 
        ( 
            [passers] => 0
            [gdat] => 2019-02-06 
        ) 
    [1] => Array 
        ( 
            [passers] => 96
            [gdat] => 2019-02-07 
        ) 
    [2] => Array 
        ( 
            [passers] => 1000
            [gdat] => 2019-02-08 
        )
)

---

如果您的问题中显示了一对一的对应关系，您可以在array1上循环并从array2中减去值：

$array3 = array();
foreach ($array1 as $key => $value) {
    $array3[$key]['passers'] = $value['passers'] - $array2[$key]['passers'];
    $array3[$key]['gdat'] = $value['gdat'];
}

如果array2中的键不一定与array1中的键对应，则可以使用

array\u search

为给定的

gdat

值查找正确的键：

$array4 = array();
foreach ($array1 as $key => $value) {
    $key2 = array_search($value['gdat'], array_column($array2, 'gdat'));
    $array4[$key]['passers'] = $value['passers'] - $array2[$key2]['passers'];
    $array4[$key]['gdat'] = $value['gdat'];
}

对于您的示例数据，两者的结果相同：

Array 
( 
    [0] => Array 
        ( 
            [passers] => 0
            [gdat] => 2019-02-06 
        ) 
    [1] => Array 
        ( 
            [passers] => 96
            [gdat] => 2019-02-07 
        ) 
    [2] => Array 
        ( 
            [passers] => 1000
            [gdat] => 2019-02-08 
        )
)

---

将数组1放入

$array1

中，将数组2放入

$array2

中，并将结果放入

$result

$result = [][];
foreach($array1 as $i => $a)
{
  // To avoid négative number we call absolute function
  $result[$i]['passers'] = abs($a['passers'] - $array2[$i]['passers']); 
  $result[$i]['gdat'] = $a['gdat'];
}
var_dump($result);