如果值在PHP中匹配，则匹配数组值并合并

Question

我有两个数组我希望将第一个数组的键与另一个数组匹配，如果两个键的值匹配，则将第二个数组的值添加到数组1

阵列1

[{"currency":1,"amount":23},{"currency":1,"amount":30},{"currency":2,"amount":40},]

数组2

[{"currency_id": 1,"currency_symbol":$},{"currency_id":2,"currency_symbol":€}]

所需的输出是：

[{"currency":$,"amount":23},{"currency":$,"amount":30},{"currency":€,"amount":40}]

我使用的代码是：

foreach($a1 as $key) {
            foreach($a2 as $cKey){
                if($a1['currency']==$a2['currency_id']){
                    $a1['currency_symbol'] = $a2['currency_symbol'];
                    echo $a1['currency_symbol'];
                }
            }
        }

Answer 1

foreach($arr1 as $k=>$key) {
    foreach($arr2 as $cKey){
        if($key['currency']==$cKey['currency_id']){
            $arr3[$k]['currency'] = $cKey['currency_symbol'];
            $arr3[$k]['amount'] = $key['amount'];
        }
    }
}
var_export($arr3);

您只需要分配变量并打印外部循环。