Question

所以我有很多部分在很多帮助下，我设法将相关部分与单个参考密钥相关联因此，我有以下数据;

array(
    array ( 'make' => 'co1', 'model' => 'mdl1', 'part' => 'prt1', 'price' => '50', 'uid' => '1', 'rid' =>'1' ),  
    array ( 'make' => 'co1', 'model' => 'mdl1', 'part' => 'prt2', 'price' => '150', 'uid' => '2', 'rid' =>'1' ),  
    array ( 'make' => 'co1', 'model' => 'mdl2', 'part' => 'prt3', 'price' => '50', 'uid' => '3', 'rid' =>'2' ),  
    array ( 'make' => 'co2', 'model' => 'mdl3', 'part' => 'prt4', 'price' => '250', 'uid' => '4', 'rid' =>'2' )
)

现在，如果你注意价格，UID和RID - 你会看到一个模式前两个数组元素和最后两个元素（它们具有相同的相关ID）属于一起。

问题是 - 价格有分歧！

我需要一种方法来执行以下操作;
1）在阵列中添加一个标志以进行不同的定价 2）将所有价格改为最低价格

作为奖励 - 我也想创建一个“父”元素...因此我会添加两个新的子数组（一个用于RID1，一个用于IRD2），结合MDL，PART和MAKE等。）。

我自己尝试了这一点，并且通常会造成混乱我可以预先生成并生成一个每个RID有一个子节点的新数组 - 但是我不能从原始数据中追加多个子数组的值:(（我以为我越来越近，但是添加了价格值！）。

$composite = array();

foreach($data as $value) {
    if(array_key_exists($value['rid'], $composite)) {
        $composite[$value['rid']] += $value['price'];
        //$composite[$value['rid']] = array('prices'=>$value['price']);
    } else {
        $composite[$value['rid']] = $value['price'];
        //$composite[$value['rid']] = array('prices'=>$value['price']);
    }
}


foreach($composite as $key=>$out){
    echo $key ." : "; print_r($out); echo "<br/>";
}

所以...为了清楚起见......我想接受这个;

array(
    array ( 'make' => 'co1', 'model' => 'mdl1', 'part' => 'prt1', 'price' => '50', 'uid' => '1', 'rid' =>'1' ),  
    array ( 'make' => 'co1', 'model' => 'mdl1', 'part' => 'prt2', 'price' => '150', 'uid' => '2', 'rid' =>'1' ),  
    array ( 'make' => 'co1', 'model' => 'mdl2', 'part' => 'prt3', 'price' => '70', 'uid' => '3', 'rid' =>'2' ),  
    array ( 'make' => 'co2', 'model' => 'mdl3', 'part' => 'prt4', 'price' => '70', 'uid' => '4', 'rid' =>'2' )
)

并以此结束;

array(
    // New Parent (for rid=1's)
    array ( 'make' => 'co1', 'model' => 'mdl1', 'part' => 'prt1,prt2', 'price' => '50', 'uid' => '1', 'rid' =>'1', 'divprice' => true ),
    array ( 'make' => 'co1', 'model' => 'mdl1', 'part' => 'prt1', 'price' => '50', 'uid' => '2', 'rid' =>'1', 'divprice' => true  ),  
    // Price changed from 150 to 50 - based on lowest price for matching rid
    array ( 'make' => 'co1', 'model' => 'mdl1', 'part' => 'prt2', 'price' => '150', 'uid' => '3', 'rid' =>'1', 'divprice' => true  ),  
    // New Parent (for rid=2's)
    array ( 'make' => 'co1, co2', 'model' => 'mdl2, mdl3', 'part' => 'prt3,prt4', 'price' => '70', 'uid' => '4', 'rid' =>'2', 'divprice' => false),        
    array ( 'make' => 'co1', 'model' => 'mdl2', 'part' => 'prt3', 'price' => '70', 'uid' => '5', 'rid' =>'2', 'divprice' => false ),  
    array ( 'make' => 'co2', 'model' => 'mdl3', 'part' => 'prt4', 'price' => '70', 'uid' => '6', 'rid' =>'2', 'divprice' => false )
)

我知道它看起来很复杂 - 但我在代码中看到了“类似”的功能 - 但对于我的生活，我无法使其工作......我最终合并和丢失价值，或者将它们加在一起（所以价格最终为200而不是50等。）

谢谢。

Answer 1

不确定你所说的价格差异的标志是什么意思，但对于你想用最低价格更新所有价格的那一点，你可以做类似的事情：

// Your data
$products = array(
    array ( 'make' => 'co1', 'model' => 'mdl1', 'part' => 'prt1', 'price' => '50', 'uid' => '1', 'rid' =>'1' ),  
    array ( 'make' => 'co1', 'model' => 'mdl1', 'part' => 'prt2', 'price' => '150', 'uid' => '2', 'rid' =>'1' ),  
    array ( 'make' => 'co1', 'model' => 'mdl2', 'part' => 'prt3', 'price' => '70', 'uid' => '3', 'rid' =>'2' ),  
    array ( 'make' => 'co2', 'model' => 'mdl3', 'part' => 'prt4', 'price' => '70', 'uid' => '4', 'rid' =>'2' )
);

// Get lowest product
function get_lowest_product($products) {

    $lowest = 0;
    foreach ($products as $key => $product) {

        $price = (int)$product["price"];         
        if ($price < $lowest || $lowest == 0) {             
            $lowest = (int)$product["price"];           
        }         
    }

    return $lowest;
} 

// Replace value in array
function replace_all_prices_to_lowest($products, $lowest) {

    foreach ($products as $key => &$product) {
         $product["price"] = (string)$lowest;       
    }

    return $products;
}


// Testing
$lowest = get_lowest_product($products);
$replaced = replace_all_prices_to_lowest($products, $lowest);
var_dump($replaced);

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