PHP - 从对象数组中按对象属性获取条目

Question

数组函数看起来像这样

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;
}

我有传递给购物车脚本的变量，如$color, $size, $product_id 。 在数组中，我试图根据product_id、color和size求和数量，但它只是将所有具有相同颜色的产品相加而不考虑product_id而不是按product_id 、 color**** 和 **size 进行分类

如何在searchArray()获取颜色、大小和 product_id ？

逻辑有什么问题？

这是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，我要感谢本论坛的每一位贡献者。 你的时间、耐心和教导让像我这样的人多年来学到了东西。

回到我上面问题的答案：

对于可能处于相同情况的人，这就是我解决的方法。

在多维数组中，如果不存在唯一的键 => 值对（超过一对键 => 值），那么在这种情况下，如果我们通过单个键 => 值对搜索元素，则它可以返回更多比一项。 因此，我们可以使用多个键 => 值对来实现搜索以获取唯一项。

方法：对于数组中的每个数组，遍历搜索数组，如果任何搜索键值与对应的数组键值不匹配，我们丢弃该数组并继续下一个数组的过程。

假设我们要从包含不同部分产品的产品列表中搜索产品详细信息，因此，在这种情况下，单独的product_id可能无法提供正确的输出。 因此，我们需要使用更多的键 => 值（即product_id 、 color和size ）来搜索列表。

 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; 
    } 

传递值并迭代

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;

    }