Php 如果另一个对象数组元素id具有相同的id，如何将新元素添加（更新）到对象数组中？

我在PHP中有以下数组：

Array1
(
[0] => stdClass Object
    (
        [expense_id] => 475
        [expense_name] => DRAY 
        [expense_unit_cost] => 270.00
    )

[1] => stdClass Object
    (
        [expense_id] => 476
        [expense_name] => FUEL 
        [expense_unit_cost] => 32.40
    )

)

及

我需要使用expense\u id将两个数组组合起来，结果如下所示：

Array3
(
[0] => stdClass Object
    (
        [expense_id] => 475
        [expense_name] => DRAY 
        [expense_unit_cost] => 270.00
        [expense_taxes] => Array
            (
                [0] => stdClass Object
                    (
                        [waybill_id] => 20005044
                        [expense_id] => 475
                        [tax_select] => tax1
                        [tax_id] => 1
                        [tax_name] => GST 5%
                        [tax_no] => 
                        [tax_value] => 13.5000
                    )

                [1] => stdClass Object
                    (
                        [waybill_id] => 20005044
                        [expense_id] => 475
                        [tax_select] => tax2
                        [tax_id] => 2
                        [tax_name] => QST 9.975%
                        [tax_no] => 
                        [tax_value] => 26.9325
                    )
            )       

    )

[1] => stdClass Object
    (
        [expense_id] => 476
        [expense_name] => FUEL 
        [expense_unit_cost] => 32.40
        [expense_taxes] => Array
            (
                [0] => stdClass Object
                    (
                        [waybill_id] => 20005044
                        [expense_id] => 476
                        [tax_select] => tax1
                        [tax_id] => 1
                        [tax_name] => GST 5%
                        [tax_no] => 
                        [tax_value] => 1.6200
                    )

                [1] => stdClass Object
                    (
                        [waybill_id] => 20005044
                        [expense_id] => 476
                        [tax_select] => tax2
                        [tax_id] => 2
                        [tax_name] => QST 9.975%
                        [tax_no] => 
                        [tax_value] => 3.2319
                    )
            )           

    )

)

如您所见，我在两个阵列上都有费用id，该必须是最终阵列的关键

我曾尝试循环一个数组并检查费用id密钥匹配，但无法实现最终数组。 另外，我还看了数组合并、数组映射和数组相交

谢谢你的建议。

试试

foreach（$key=>$element的对象）{
如果（$element->expense\u id==475）{
$element->expense\u taxes[0]=$stdClass；
}
}

这一切有点复杂，因为实际的对象数组是从ajax到PHP的，但是，我根据KennyDope的建议找到了答案

如果Array1是$expenses\u obj，Array2是$invoice\u taxes\u obj

        foreach ($expenses_obj as $key => $expense):
            foreach ($invoice_taxes_obj as $key => $tax):
                if ($expense->expense_id == $invoice_taxes_obj[$key]->expense_id){
                    $expense->taxes[] = (array)$invoice_taxes_obj[$key]; 
                }   
            endforeach;
        endforeach;

最终结果就是我需要的：

Array
(
[0] => stdClass Object
    (
        [expense_id] => 475
        [expense_name] => DRAY 
        [expense_unit_cost] => 270.00
        [taxes] => Array
            (
                [0] => Array
                    (
                        [waybill_id] => 20005044
                        [expense_id] => 475
                        [tax_select] => tax1
                        [tax_id] => 1
                        [tax_name] => GST 5%
                        [tax_no] => 
                        [tax_value] => 13.5000
                    )

                [1] => Array
                    (
                        [waybill_id] => 20005044
                        [expense_id] => 475
                        [tax_select] => tax2
                        [tax_id] => 2
                        [tax_name] => QST 9.975%
                        [tax_no] => 
                        [tax_value] => 26.9325
                    )

            )

    )

[1] => stdClass Object
    (
        [expense_id] => 476
        [expense_name] => FUEL 
        [expense_unit_cost] => 32.40
        [taxes] => Array
            (
                [0] => Array
                    (
                        [waybill_id] => 20005044
                        [expense_id] => 476
                        [tax_select] => tax1
                        [tax_id] => 1
                        [tax_name] => GST 5%
                        [tax_no] => 
                        [tax_value] => 1.6200
                    )

                [1] => Array
                    (
                        [waybill_id] => 20005044
                        [expense_id] => 476
                        [tax_select] => tax2
                        [tax_id] => 2
                        [tax_name] => QST 9.975%
                        [tax_no] => 
                        [tax_value] => 3.2319
                    )

            )

    )

)

---

欢迎您的评论。谢谢你的输入。

我认为循环可以解决这个问题，你能在这里发布你的代码吗，可能有错误。在这里发布代码要复杂得多。谢谢，谢谢。我以前尝试过，但由于对象数组的原因没有成功。

Array
(
[0] => stdClass Object
    (
        [expense_id] => 475
        [expense_name] => DRAY 
        [expense_unit_cost] => 270.00
        [taxes] => Array
            (
                [0] => Array
                    (
                        [waybill_id] => 20005044
                        [expense_id] => 475
                        [tax_select] => tax1
                        [tax_id] => 1
                        [tax_name] => GST 5%
                        [tax_no] => 
                        [tax_value] => 13.5000
                    )

                [1] => Array
                    (
                        [waybill_id] => 20005044
                        [expense_id] => 475
                        [tax_select] => tax2
                        [tax_id] => 2
                        [tax_name] => QST 9.975%
                        [tax_no] => 
                        [tax_value] => 26.9325
                    )

            )

    )

[1] => stdClass Object
    (
        [expense_id] => 476
        [expense_name] => FUEL 
        [expense_unit_cost] => 32.40
        [taxes] => Array
            (
                [0] => Array
                    (
                        [waybill_id] => 20005044
                        [expense_id] => 476
                        [tax_select] => tax1
                        [tax_id] => 1
                        [tax_name] => GST 5%
                        [tax_no] => 
                        [tax_value] => 1.6200
                    )

                [1] => Array
                    (
                        [waybill_id] => 20005044
                        [expense_id] => 476
                        [tax_select] => tax2
                        [tax_id] => 2
                        [tax_name] => QST 9.975%
                        [tax_no] => 
                        [tax_value] => 3.2319
                    )

            )

    )

)