PHP - 從對象數組中按對象屬性獲取條目

Question

數組函數看起來像這樣

function searchArray($array, $key, $value){
    $array_iteration = new RecursiveIteratorIterator(new RecursiveArrayIterator($array));

    $output = array();

    foreach($array_iteration as $sub_array){
        $sub = $array_iteration->getSubIterator();
        if($sub[$key] == $value){
            $output[] = iterator_to_array($sub);
        }
    }

    return $output;
}

我有傳遞給購物車腳本的變量，如$color, $size, $product_id 。 在數組中，我試圖根據product_id、color和size求和數量，但它只是將所有具有相同顏色的產品相加而不考慮product_id而不是按product_id 、 color**** 和 **size 進行分類

如何在searchArray()獲取顏色、大小和 product_id ？

邏輯有什么問題？

這是cart.php

if($_POST['cat_type'] == "single"){
$color           = $_POST['color'];
$product_size    = str_replace("+", " ", $_POST['product_size']);
$amount           = $_POST['sprice'];
$vendor          = $_POST['sseller'];
//$quantity        = $_POST['quantity'];
$product_id      = (int)$_POST['product_id'];
$img             = "";
$cat             = $_POST['cat_type'];


$product_info = $product->getProductById($product_id);
$title =  $product_info[0]->title;

$cart = array();


if(isset($_SESSION['__cart'])){
        $cart  = $_SESSION['__cart'];
}

$current_item = array();
$current_item['image'] = $product_info[0]->images;
$current_item['pimage'] = $img;
$current_item['title'] = $product_info[0]->title;
$current_item['price'] = $amount;
$current_item['id'] = $product_info[0]->id;
$current_item['vendor'] = $vendor;
$current_item['color'] = $color;
$current_item['size'] = $product_size;
$current_item['name'] = $title;
$current_item['category'] = $cat;
$qty = 1;

if (isset($_POST['quantity'])) {
        $qty = $_POST['quantity'];
}

    if(!empty($cart)){
        $search_result = searchArray($cart, 'color', $color, 'size', $product_size, 'id', $product_id);

        $index = 0;
        if($search_result){
            foreach($cart as $key=>$value){
                if($value['color'] == $color && $value['size'] == $product_size && $value['id'] == $product_id){
                    $index = $key;
                    break;
                }
            }


            $cart[$index]['quantity'] += $qty;
            $cart[$index]['amount'] += $amount*$qty;
            } else {
            $current_item['amount'] = $amount*$qty;
            $current_item['quantity'] = $qty;

            $cart[] = $current_item;
        }
    } else {
        $current_item['amount'] = $amount*$qty;
        $current_item['quantity'] = $qty;

        $cart[] = $current_item;
    }

    $_SESSION['__cart'] = $cart;
    echo "1";
    exit;

}

Answer 1

首先，我要感謝本論壇的每一位貢獻者。 你的時間、耐心和教導讓像我這樣的人多年來學到了東西。

回到我上面問題的答案：

對於可能處於相同情況的人，這就是我解決的方法。

在多維數組中，如果不存在唯一的鍵 => 值對（超過一對鍵 => 值），那么在這種情況下，如果我們通過單個鍵 => 值對搜索元素，則它可以返回更多比一項。 因此，我們可以使用多個鍵 => 值對來實現搜索以獲取唯一項。

方法：對於數組中的每個數組，遍歷搜索數組，如果任何搜索鍵值與對應的數組鍵值不匹配，我們丟棄該數組並繼續下一個數組的過程。

假設我們要從包含不同部分產品的產品列表中搜索產品詳細信息，因此，在這種情況下，單獨的product_id可能無法提供正確的輸出。 因此，我們需要使用更多的鍵 => 值（即product_id 、 color和size ）來搜索列表。

 function searchArray($array, $search_list) { 

        // Create the result array 
        $result = array(); 

        // Iterate over each array element 
        foreach ($array as $key => $value) { 

            // Iterate over each search condition 
            foreach ($search_list as $k => $v) { 

                // If the array element does not meet 
                // the search condition then continue 
                // to the next element 
                if (!isset($value[$k]) || $value[$k] != $v) 
                { 

                    // Skip two loops 
                    continue 2; 
                } 
            } 

            // Append array element's key to the 
            //result array 
            $result[] = $value; 
        } 

        // Return result  
        return $result; 
    } 

傳遞值並迭代

if($_POST['cat_type'] == "single"){
$color           = $_POST['color'];
$product_size    = str_replace("+", " ", $_POST['product_size']);
$amount           = $_POST['sprice'];
$vendor          = $_POST['sseller'];
//$quantity        = $_POST['quantity'];
$product_id      = (int)$_POST['product_id'];
$img             = "";
$cat             = $_POST['cat_type'];


$product_info = $product->getProductById($product_id);
$title =  $product_info[0]->title;

$cart = array();


    if(isset($_SESSION['__cart'])){
            $cart  = $_SESSION['__cart'];
    }

    $current_item = array();
    $current_item['image'] = $product_info[0]->images;
    $current_item['pimage'] = $img;
    $current_item['title'] = $product_info[0]->title;
    $current_item['price'] = $amount;
    $current_item['id'] = $product_id;
    $current_item['vendor'] = $vendor;
    $current_item['color'] = $color;
    $current_item['size'] = $product_size;
    $current_item['name'] = $title;
    $current_item['category'] = $cat;



    $qty = 1;

    // Define search list with multiple key=>value pair 
    $search_items = array('color'=>$color, 'size'=>$product_size,  'id'=>$product_id); 

    if (isset($_POST['quantity'])) {
            $qty = $_POST['quantity'];
    }

        if(!empty($cart)){
                // Call search and pass the array and 
          // the search list 
         $search_result = searchArray($cart, $search_items); 

            $index = 0;
            if($search_result){
                foreach($cart as $key=>$value){
                    //var_dump($value);
                    if($value['color'] == $color and $value['size'] == $product_size and $value['id'] == $product_id){
                        $index = $key;
                        break;
                    }
                }


                $cart[$index]['quantity'] += $qty;
                $cart[$index]['amount'] += $amount*$qty;
                } else {
                $current_item['amount'] = $amount*$qty;
                $current_item['quantity'] = $qty;

                $cart[] = $current_item;
            }
        } else {
            $current_item['amount'] = $amount*$qty;
            $current_item['quantity'] = $qty;

            $cart[] = $current_item;
        }

        $_SESSION['__cart'] = $cart;
        echo "1";
        exit;

    }