php - foreach中的foreach条件过滤

Question

抱歉，我不知道如何提供更合适的主题

如何才能仅获取 $regular_items 数组中的剩余数组(在本例中为:banana)(不属于前两个条件)？ 我已经尝试了几天的各种 if 条件仍然不起作用。

以下代码为我提供了 $regular_items 数组中的所有 3 个 $cart 数组。

<?php
$offers[0]['buy_type'] = 'brand';
$offers[0]['buy_type_id'] = '1';
$offers[0]['name'] = 'brand1';

$offers[1]['buy_type'] = 'item';
$offers[1]['buy_type_id'] = '2';
$offers[1]['name'] = 'item2';

$carts[2]['name'] = 'orange';
$carts[2]['brand_id'] = '3';
$carts[2]['item_id'] = '2';

$carts[4]['name'] = 'banana';
$carts[4]['brand_id'] = '6';
$carts[4]['item_id'] = '4';

$carts[6]['name'] = 'apple';
$carts[6]['brand_id'] = '1';
$carts[6]['item_id'] = '6';

foreach ($carts as $cart=>$c) {
    foreach ($offers as $offer=>$o) {

        if ($o['buy_type'] == 'brand' && $o['buy_type_id'] == $c['brand_id']) {
        // if this condition is true, add to $promo_brands array
            $promo_brands[$o['buy_type_id']][$cart] = $c;
        } else if ($o['buy_type'] == 'item' && $o['buy_type_id'] == $c['item_id']) {
        // otherwise if this condition is true, add to $promo_items array
            $promo_items[$cart] = $c;
        } else {
        // if none of the above, add to $regular_items
            $regular_items[$cart] = $c;
        }
    }
}
echo 'Promo Brands<br />';  
var_dump($promo_brands);
echo '<br />Promo Items<br />';
var_dump($promo_items);
echo '<br />Regular Items<br />';
var_dump($regular_items);
?>

期望的输出

Promo Brands
array(1) { [1]=> array(1) { [6]=> array(3) { ["name"]=> string(5) "apple" ["brand_id"]=> string(1) "1" ["item_id"]=> string(1) "6" } } } 
Promo Items
array(1) { [2]=> array(3) { ["name"]=> string(6) "orange" ["brand_id"]=> string(1) "3" ["item_id"]=> string(1) "2" } } 
Regular Items
array(1) { [4]=> array(3) { ["name"]=> string(6) "banana" ["brand_id"]=> string(1) "6" ["item_id"]=> string(1) "4" } }

已解决:

在满足条件后取消数组元素，然后再转到另一个条件

$tmp_carts = $carts;
foreach ($tmp_carts as $cart=>$c) {
    foreach ($offers as $offer=>$o) {

        if ($o['buy_type'] == 'brand' && $o['buy_type_id'] == $c['brand_id']) {
        // if this condition is true, add to $promo_brands array
        $promo_brands[$o['buy_type_id']][$cart] = $c;
        unset($tmp_carts[$cart]);
        } else if ($o['buy_type'] == 'item' && $o['buy_type_id'] == $c['item_id']) {
        // otherwise if this condition is true, add to $promo_items array
        $promo_items[$cart] = $c;
        unset($tmp_carts[$cart]);
        } else {

        }
    }
}

$regular_items = $tmp_carts;

Answer 1

只是你需要检查

使用if条件。

if($c['name'] == "banana")
{
    $regular_items[$cart] = $c;
}

或

使用in_array()。

if(in_array("banana", $c))
{
    $regular_items[$cart] = $c;
}

代码

$offers[1]['buy_type'] = 'item';
$offers[1]['buy_type_id'] = '2';
$offers[1]['name'] = 'item2';

$carts[2]['name'] = 'orange';
$carts[2]['brand_id'] = '3';
$carts[2]['item_id'] = '2';

$carts[4]['name'] = 'banana';
$carts[4]['brand_id'] = '6';
$carts[4]['item_id'] = '4';

$carts[6]['name'] = 'apple';
$carts[6]['brand_id'] = '1';
$carts[6]['item_id'] = '6';

foreach ($carts as $cart=>$c) {
    foreach ($offers as $offer=>$o) {
        if ($o['buy_type'] == 'brand' && $o['buy_type_id'] == $c['brand_id']) {
            $promo_brands[$o['buy_type_id']][$cart] = $c;
        } else if ($o['buy_type'] == 'item' && $o['buy_type_id'] == $c['item_id']) {
            $promo_items[$cart] = $c;
        } else {
            if($c['name'] == "banana")
            {
                $regular_items[$cart] = $c;
            }
        }
    }
}
echo '<br />Regular Items<br />';   
print_r($regular_items);
?>

输出

Regular Items
Array
(
    [4] => Array
        (
            [name] => banana
            [brand_id] => 6
            [item_id] => 4
        )

)

使用unset()删除已经处于状态的数组元素。

foreach ($carts as $cart=>$c) {
    foreach ($offers as $offer=>$o) {
        if ($o['buy_type'] == 'brand' && $o['buy_type_id'] == $c['brand_id']) {

            $promo_brands[$o['buy_type_id']][$cart] = $c;
            unset($carts[$cart]);
        } else if ($o['buy_type'] == 'item' && $o['buy_type_id'] == $c['item_id']) {
            $promo_items[$cart] = $c;
            unset($carts[$cart]);
        }
    }
}

echo "<pre>";
print_r($carts);

输出

Array
(
    [4] => Array
        (
            [name] => banana
            [brand_id] => 6
            [item_id] => 4
        )

)