Question

如果值匹配，我正在根据键的比较组合2个不同的数组，否则不会发生组合。

以下是每个数组开始的简短示例，但两个数组都可能是大约1,000个项目：

Vehicle Array
(
  [vehicle] => 2016 Ford Transit 250 Cargo Van
  [stockno] => 153721
  [msrp] => 32195
  [price] => 32195
  [payment] => 359
  [type] => New
  [bodystyle] => Van
  [mileage] => 6
  [year] => 2016
  [make] => Ford
  [model] => Transit 250
  [trim] => Cargo Van
),(
  [vehicle] => 2016 Ford F150 XLT
  [stockno] => 153723
  [msrp] => 36195
  [price] => 36195
  [payment] => 429
  [type] => New
  [bodystyle] => Truck
  [mileage] => 6
  [year] => 2016
  [make] => Ford
  [model] => F150
  [trim] => XLT
)

Special Array
(
  [vehicle] => 2016 Ford Transit 250 Cargo Van
  [store] => Baxter Ford
  [offertype] => $ Off MSRP
  [offervalue] => Up to $10,000
  [disclaimer] => *Valid on in-stock models. Based on stock #161621. Tax, title and license extra. With approved credit. Includes hail sale savings. See dealer for details. Offer expires 8\/1\/16.
  [expires] => 8/1/16
),(
  [vehicle] => 2016 Ford Mustang Premium
  [store] => Baxter Ford
  [offertype] => $ Off MSRP
  [offervalue] => Up to $4,000
  [disclaimer] => *Valid on in-stock models. Based on stock #163421. Tax, title and license extra. With approved credit. Includes hail sale savings. See dealer for details. Offer expires 8\/1\/16.
  [expires] => 8/1/16
)

目标是结合车辆阵列[车辆]和特殊阵列[车辆]来创建这样的阵列：

Combined Array
(
  [vehicle] => 2016 Ford Transit 250 Cargo Van
  [stockno] => 153721
  [msrp] => 32195
  [price] => 32195
  [payment] => 359
  [type] => New
  [bodystyle] => Van
  [mileage] => 6
  [year] => 2016
  [make] => Ford
  [model] => Transit 250
  [trim] => Cargo Van
  [store] => Baxter Ford
  [offertype] => $ Off MSRP
  [offervalue] => Up to $10,000
  [disclaimer] => *Valid on in-stock models. Based on stock #161621. Tax, title and license extra. With approved credit. Includes hail sale savings. See dealer for details. Offer expires 8\/1\/16.
  [expires] => 8/1/16
),(
  [vehicle] => 2016 Ford F150 XLT
  [stockno] => 153723
  [msrp] => 36195
  [price] => 36195
  [payment] => 429
  [type] => New
  [bodystyle] => Truck
  [mileage] => 6
  [year] => 2016
  [make] => Ford
  [model] => F150
  [trim] => XLT
)

这似乎非常简单，但我似乎错过了一些东西。我尝试过这样的嵌套foreach：

foreach ($vehicleArr as $v) {
  foreach ($specialArr as $s) {
    if ($v['vehicle'] === $s['vehicle']) {
      $freshArr[] = array_merge($v, $s);
    } else {
      $freshArr[] = $v;
    }
  }
}

这会造成大量内存泄漏并导致脚本死亡。

提前致谢。

Answer 1

您的代码问题：新的数组大小变为n * m长度。

我的工作实例

$vehicleList = [
    [ 'vehicle' => '2016 Ford Transit 250 Cargo Van',
        'stockno' => '153721'],
    [ 'vehicle' => '2016 Ford F150 XLT',
        'stockno' => '153723']
];
$spectialList = [
    [ 'vehicle' => '2016 Ford Transit 250 Cargo Van',
        'store' => 'Baxter Ford'],
    [ 'vehicle' => '2016 Ford Mustang Premium',
        'store' => 'Baxter Ford']
];

$newVehicleList = $vehicleList;

// let's change new array using reference
foreach ($newVehicleList as &$vehicle) {
    foreach ($spectialList as $special) {
        if ($vehicle['vehicle'] == $special['vehicle']) {
            //just change value wihtout creationg new one
            $vehicle = array_merge($vehicle, $special); 
        }
    }
}
// to make sure that there will no be any changes
unset($vehicle); 

var_dump($newVehicleList);

关于foreach中的参考，您可以在那里阅读：http://php.net/manual/ru/control-structures.foreach.php

PHP组合关联数组如果特定键匹配在For循环内

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