Question

我有一个问题，我需要通过一个数组与php中的其他数组，但我只通过最后一个数组，我的数组是：

Array
(
[0] => Array
    (
        [syn_id] => 17070
        [syn_label] => fd+dfd
    )
[1] => Array
    (
        [syn_id] => 17068
        [syn_label] => fds+dsfds
    )
[2] => Array
    (
        [syn_id] => 17069
        [syn_label] => klk+stw
    )
 )

我的php：

       $a_ddata = json_decode(method(), true);
        foreach ($a_ddata as $a_data)
        {
            $a_data['syn_label'] = urldecode(utf8_decode($a_data['syn_label']));
        }

使用此代码我只通过最后一个数组[2]，但如何通过数组？请帮助我我需要得到阵列：

  Array
(
[0] => Array
    (
        [syn_id] => 17070
        [syn_label] => fd dfd
    )
[1] => Array
    (
        [syn_id] => 17068
        [syn_label] => fds dsfds
    )
[2] => Array
    (
        [syn_id] => 17069
        [syn_label] => klk stw
    )
 )

Answer 1

当您使用foreach迭代某些内容时，默认情况下，PHP会为每个元素创建一个副本供您在循环中使用。所以在你的代码中，

$a_ddata = json_decode(method(), true);
foreach ($a_ddata as $a_data)
{
    // $a_data is a separate copy of one of the child arrays in $a_ddata
    // this next line will modify the copy
    $a_data['syn_label'] = urldecode(utf8_decode($a_data['syn_label']));
    // but at the end of the loop the copy is discarded and replaced with a new one
}

幸运的是manual page for foreach为我们提供了一种使用引用运算符&覆盖此行为的方法。如果将它放在as关键字和循环变量之间，则可以在循环中更新源数组。

$a_ddata = json_decode(method(), true);
foreach ($a_ddata as &$a_data)
{
    // $a_data is now a reference to one of the elements to $a_ddata
    // so, this next line will update $a_ddata's individual records 
    $a_data['syn_label'] = urldecode(utf8_decode($a_data['syn_label']));
}
// and you should now have the result you want in $a_ddata

Answer 2

        $a_ddata = json_decode(method(), true); $i=0;
        foreach ($a_ddata as $a_data)
        {
            $a_data_f[$i]['syn_id'] = $a_data['syn_id'];
            $a_data_f[$i]['syn_label'] = urldecode(utf8_decode($a_data['syn_label']));
            $i++;
        }

这应该是你的答案..

Answer 3

这应该有所帮助：

$a_data['syn_label'][] = urldecode(utf8_decode($a_data['syn_label']));

对于每次迭代，您只能替换$a_data['syn_label']。通过添加[]，您将使其成为一个多维数组，每次迭代都会递增。

通过php中的其他数组的数组

3 个答案: