Question

我有一个json数组

[{
    "sku": "5221",
    "qty": 1,
    "price": 17.5,
    "desc": "5395 - Replenish Natural Hydrating Lotion 3.5oz"
}, {
    "sku": "11004",
    "qty": 1,
    "price": 30.95,
    "desc": "150 - Q-Plus 16oz"
}]

我在$ item php变量中获取此数组并解码该数组

$jsonDecode = json_decode($items, true);
echo 'before' . PHP_EOL;
print_r($jsonDecode);

foreach ($jsonDecode as $key => $obj) {
    if ($obj->sku == '11004') {
        $jsonDecode[$key]['qty'] = '5';
    }
}
print_r($jsonDecode);

现在我想如果sku是11004那么该指数的数量将是5。但在使用上面的代码后，我得到了相同的数组，该索引具有相同的数量。

我怎么能这样做请帮助。

Answer 1

尝试以下解决方案：

$json = '[{
    "sku": "5221",
    "qty": 1,
    "price": 17.5,
    "desc": "5395 - Replenish Natural Hydrating Lotion 3.5oz"
}, {
    "sku": "11004",
    "qty": 1,
    "price": 30.95,
    "desc": "150 - Q-Plus 16oz"
}]';

$array = json_decode($json, true);
//print_r($array);

foreach($array as &$a){
    if($a['sku'] == 11004){
        $a['qty'] = 5;
    }
}

echo json_encode($array);

<强>输出：

[{
    "sku": "5221",
    "qty": 1,
    "price": 17.5,
    "desc": "5395 - Replenish Natural Hydrating Lotion 3.5oz"
}, {
    "sku": "11004",
    "qty": 5,
    "price": 30.95,
    "desc": "150 - Q-Plus 16oz"
}]

更新json数组的项目

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