如何将多数组转换为json多数组

Question

我有从数据库返回多数组的 foreach 循环 我想将此数组转换为 json 中的多数组，

如何做到这一点？

php 数组示例

Array
(
    [0] => Array
        (
            [it_code] => 2894
            [it_quantity] => 300
            [it_price] => 0
            [it_notes] => 
        )

    [1] => Array
        (
            [it_code] => 2894
            [it_quantity] => 284
            [it_price] => 0
            [it_notes] => 
        )

    [2] => Array
        (
            [it_code] => 2894
            [it_quantity] => 4
            [it_price] => 0
            [it_notes] => 
        )

    [3] => Array
        (
            [it_code] => 2894
            [it_quantity] => 3
            [it_price] => 0
            [it_notes] => 
        )

)

我希望返回的 json 是这种格式

 [
            ['2894', 300, 0,''],
            ['2894', 284, 0,''],
            ['2894', 4, 0,''],
            ['2894', 3, 0,''],
            ['2894', 10, 0, '']
        ]

我的代码是这样的

$this->db->where("it_parent_item", $parent_id);
$this->db->select("d_items.it_code,d_items_type.it_ty_ar_desc,d_items.it_quantity,d_items.it_price,it_notes");
$this->db->join('d_items_type','d_items_type.it_ty_id=d_items.it_type','left');
$this->db->from("d_items");
$result = $this->db->get()->result_array();


echo "<pre>";
print_r($result);
echo "</pre>";

Answer 1

您可以使用array_values() 和array_walk_recursive() 将整数转换为字符串

$newArray = array();
foreach($sourceArray as $element) {
    $newArray[] = array_values($element);
}

array_walk_recursive($newArray, 
function(&$value, $key){
    $value = (string)$value;
});

print_r (json_encode($newArray));

Answer 2

在我看来，您希望循环遍历您的数组，以便在 PHP 中按照您想要的方式对其进行格式化，然后将该 PHP 数组转换为 JSON：

$dataArray = array(); //The array containing your values
$jsonArray = array(); //The array which will be formatted for json

foreach($dataArray as $value){
    $keylessValues = array_values($value);
    $jsonArray[] = $keylessValues;
}

$jsonArray = json_encode($jsonArray); //This is now a JSON array storing your values

我们在这里做的是遍历数组，然后只取array_values() 的值并将它们放入$jsonArray 的新索引中。

一旦我们移动了整个数组，我们就可以使用json_encode()将我们新格式化和填充的数组转换为 JSON

值得注意的是，您设置为'' 的值将作为null 传递。如果您需要将这些值作为'' 而不是null，请查看@FirstOne 给出的答案。

Answer 3

这是初始数组（显示为 PHP 数组，但与您的帖子相同）：

$initialArray = array(
    array(
        "it_code"     => 2894,
        "it_quantity" => 300,
        "it_price"    => 0,
        "it_notes"    => '',
    ),
    array(
        "it_code"     => 2894,
        "it_quantity" => 284,
        "it_price"    => 0,
        "it_notes"    => '',
    ),
    array(
        "it_code"     => 2894,
        "it_quantity" => 4,
        "it_price"    => 0,
        "it_notes"    => '',
    ),
    array(
        "it_code"     => 2894,
        "it_quantity" => 3,
        "it_price"    => 0,
        "it_notes"    => '',
    ),
);

您可以遍历每个元素，只将值分配给一组新数组，如下所示：

$newArray = array();

foreach ($initialArray as $subArray)
{
    $newArray[] = array_values($subArray);
}

生成的数组将如下所示：

[[2894,300,0,""],[2894,284,0,""],[2894,4,0,""],[2894,3,0,""]]

Answer 4

请注意，其他答案将给出null 而不是''。

因此，不使用array_values，此代码将返回所有值，但如果有任何空值，它会返回''（正如问题中所预期的那样）：

$arr = array();
foreach($foo as $value){
    $tmp = array();
    foreach($value as $v){
        $tmp[] = $v===null ? '' : $v;
    }
    $arr[] = $tmp;
}

echo json_encode($arr);

输出：

[[2894,300,0,""],[2894,284,0,""],[2894,4,0,""],[2894,3,0,""]]

[
    [2894,300,0,""],
    [2894,284,0,""],
    [2894,4,0,""],
    [2894,3,0,""]
]

这是一个可复制的数组：

$foo = array
(
    0 => array
        (
            'it_code' => 2894,
            'it_quantity' => 300,
            'it_price' => 0,
            'it_notes' => null
        ),

    1 => Array
        (
            'it_code' => 2894,
            'it_quantity' => 284,
            'it_price' => 0,
            'it_notes' => null
        ),

    2 => Array
        (
            'it_code' => 2894,
            'it_quantity' => 4,
            'it_price' => 0,
            'it_notes' => null
        ),

    3 => Array
        (
            'it_code' => 2894,
            'it_quantity' => 3,
            'it_price' => 0,
            'it_notes' => null
        ),

);