将数据添加到多维数组答案

【问题标题】：Add data to multidimensial array将数据添加到多维数组
【发布时间】：2014-08-25 22:26:48
【问题描述】：

我在向数组中添加数据时遇到了一些问题。我的第一个数据有一些数据，如下代码：

array1
{projectId: 1, task: 1, hoursEstimated: 345},
{projectId: 1, task: 4, hoursEstimated: 274},
{projectId: 2, task: 1, hoursEstimated: 432},
{projectId: 2, task: 2, hoursEstimated: 347},
{projectId: 2, task: 4, hoursEstimated: 815},

array2
{projectId: 1, task: 1, totalHoursWorked: 145},
{projectId: 1, task: 2, totalHoursWorked: 234},
{projectId: 1, task: 3, totalHoursWorked: 283},
{projectId: 1, task: 4, totalHoursWorked: 174},
{projectId: 2, task: 1, totalHoursWorked: 205},
{projectId: 2, task: 2, totalHoursWorked: 153},
{projectId: 2, task: 3, totalHoursWorked: 634},
{projectId: 2, task: 4, totalHoursWorked: 815},

所以我要做的是：array2 必须匹配数组 1 的 taskId 和 projectId 并附加数据。所以对于 de 数组中的第一个元素，它会变成这样：

Array3
{projectId: 1, task: 1, hoursEstimated: 345, totalHoursWorked: 145}
etc..

【问题讨论】：

能否请您提供声明前两个数组的实际代码
您的数组在 PHP 中无效。
哦，是的，我知道。它是一个虚拟数据库。我不在我的工作计算机上，所以我无权访问数据库。但是我的查询会给出这个输出。因此，两个数组中的 projectId 和任务必须相同，以便可以将其附加到数组中。我们有很多项目，我们为它们使用相同的任务。

标签： php arrays database merge intersect

【解决方案1】：

foreach($data1 as $key => &$value){
    foreach($data2 as $k => $v){
        if($v['projectId'] == $value['projectId'] && $v['task'] == $value['task']){
            $value['totalHoursWorked'] = $v['totalHoursWorked'];
        }
    }
}

【讨论】：

【解决方案2】：

根据您的虚拟值，您可以只使用 foreach 并使用 & 引用数组一。示例：

$array1 = array(
    array('projectId' => 1, 'task' => 1, 'hoursEstimated' => 345),
    array('projectId' => 1, 'task' => 4, 'hoursEstimated' => 274),
    array('projectId' => 2, 'task' => 1, 'hoursEstimated' => 432),
    array('projectId' => 2, 'task' => 2, 'hoursEstimated' => 347),
    array('projectId' => 2, 'task' => 4, 'hoursEstimated' => 815),
);

$array2 = array(
    array('projectId' => 1, 'task' => 1, 'totalHoursWorked' => 145),
    array('projectId' => 1, 'task' => 2, 'totalHoursWorked' => 234),
    array('projectId' => 1, 'task' => 3, 'totalHoursWorked' => 283),
    array('projectId' => 1, 'task' => 4, 'totalHoursWorked' => 174),
    array('projectId' => 2, 'task' => 1, 'totalHoursWorked' => 205),
    array('projectId' => 2, 'task' => 2, 'totalHoursWorked' => 153),
    array('projectId' => 2, 'task' => 3, 'totalHoursWorked' => 634),
    array('projectId' => 2, 'task' => 4, 'totalHoursWorked' => 815),
);

foreach($array1 as &$values) {
    foreach($array2 as $values2) {
        if($values['projectId'] == $values2['projectId'] && $values['task'] == $values2['task']) {
            $values['totalHoursWorked'] = $values2['totalHoursWorked'];
        }
    }
}

echo '<pre>';
print_r($array1);

应该产生类似的东西：

Array
(
    [0] => Array
        (
            [projectId] => 1
            [task] => 1
            [hoursEstimated] => 345
            [totalHoursWorked] => 145
        )

    [1] => Array
        (
            [projectId] => 1
            [task] => 4
            [hoursEstimated] => 274
            [totalHoursWorked] => 174
        )

    [2] => Array
        (
            [projectId] => 2
            [task] => 1
            [hoursEstimated] => 432
            [totalHoursWorked] => 205
        )

    [3] => Array
        (
            [projectId] => 2
            [task] => 2
            [hoursEstimated] => 347
            [totalHoursWorked] => 153
        )

    [4] => Array
        (
            [projectId] => 2
            [task] => 4
            [hoursEstimated] => 815
            [totalHoursWorked] => 815
        )

)

【讨论】：

【解决方案3】：

你可以试试这些方法：

foreach($array1 as &$arr1){    
    foreach($array2 as $arr2){
         if($arr1['projectId'] === arr2['projectId'] 
         && $arr1['task'] === $arr2['task']){
              $arr1['totalHoursWorked'] = $arr2['totalHoursWorked'];
         }
    }
}
//or
array_walk($array1,function($arr1){
    foreach($array2 as $arr2){
         if($arr1['projectId'] === arr2['projectId']
         && $arr1['task'] === $arr2['task']){
              $arr1['totalHoursWorked'] = $arr2['totalHoursWorked'];
         }
    }
});
print_r($array1);

【讨论】：