【发布时间】：2013-08-27 20:55:50
【问题描述】：
我在 WP 中存储了一个 post_meta_key。该值是一个数组。
我做了一个 get_post_meta - which returns an empty array the first time。 $single 设置为假。这个数组被称为$voters，因为它存储了一个选民列表。 key是用户id，value是一个数组，接下来介绍。
然后我遍历输入，清理它们，并创建另一个名为 current_vote 的 key=>value 数组。这是为用户 ID 键设置的值。
我想将current_vote 作为值插入到投票者数组中。现在，我正在尝试这个：
$voters[$voter_id] = $current_vote;
这会正确地从$voter_id 创建一个键，并将current_vote 数组作为值。
但是！随着第二次投票的到来，它不只是将另一个键插入现有数组 - 它接受第一次投票，并将其插入到新数组中！
第一个投票是这样的：
Array
(
[13] => Array
(
[13] => 0
[15] => 75
[21] => 0
[34] => 0
[16] => 0
[50] => 0
[28] => 0
[45] => 0
[10] => 0
[40] => 0
[41] => 0
[52] => 0
[22] => 0
[29] => 0
[23] => 0
[30] => 0
[48] => 0
[53] => 0
[38] => 0
[35] => 0
[61] => 0
[26] => 0
[9] => 0
[62] => 0
[54] => 0
[49] => 0
[14] => 0
[19] => 0
[42] => 0
[55] => 0
[5] => 0
[12] => 0
[46] => 0
[56] => 0
[32] => 0
[36] => 0
[2] => 0
[17] => 0
[4] => 0
[27] => 0
[44] => 0
[25] => 0
[57] => 0
[37] => 0
[3] => 0
[51] => 0
[31] => 0
[43] => 0
[47] => 0
[39] => 0
)
)
一旦第二次投票进来，它看起来像这样：
Array
(
[0] => Array
(
[13] => Array
(
[13] => 0
[15] => 75
[21] => 0
[34] => 0
[16] => 0
[50] => 0
[28] => 0
[45] => 0
[10] => 0
[40] => 0
[41] => 0
[52] => 0
[22] => 0
[29] => 0
[23] => 0
[30] => 0
[48] => 0
[53] => 0
[38] => 0
[35] => 0
[61] => 0
[26] => 0
[9] => 0
[62] => 0
[54] => 0
[49] => 0
[14] => 0
[19] => 0
[42] => 0
[55] => 0
[5] => 0
[12] => 0
[46] => 0
[56] => 0
[32] => 0
[36] => 0
[2] => 0
[17] => 0
[4] => 0
[27] => 0
[44] => 0
[25] => 0
[57] => 0
[37] => 0
[3] => 0
[51] => 0
[31] => 0
[43] => 0
[47] => 0
[39] => 0
)
)
[4] => Array
(
[13] => 75
[15] => 0
[21] => 0
[34] => 0
[16] => 0
[50] => 0
[28] => 0
[45] => 0
[10] => 0
[40] => 0
[41] => 0
[52] => 0
[22] => 0
[29] => 0
[23] => 0
[30] => 0
[48] => 0
[53] => 0
[38] => 0
[35] => 0
[61] => 0
[26] => 0
[9] => 0
[62] => 0
[54] => 0
[49] => 0
[14] => 0
[19] => 0
[42] => 0
[55] => 0
[5] => 0
[12] => 0
[46] => 0
[56] => 0
[32] => 0
[36] => 0
[2] => 0
[17] => 0
[4] => 0
[27] => 0
[44] => 0
[25] => 0
[57] => 0
[37] => 0
[3] => 0
[51] => 0
[31] => 0
[43] => 0
[47] => 0
[39] => 0
)
)
因此，元素被正确插入（新元素的键为 4），但第一个元素被插入到新的数组键 0 中。
这是我的完整代码：
$quarter = substr($date, 1,1);
$year = substr($date, 2,4);
$voters = get_post_meta(2165, 'bonus_votesq'. $quarter . $year);
//initialize vote arrays and vars
$votes = $_POST['votes'];
$voter_id = $_POST['voter_id'];
$voting_array = array();
$current_vote = array();
parse_str($votes, $voting_array);
foreach ($voting_array as $vid => $awarded_points) {
$current_vote[sanitize_key($vid)] = sanitize_key($awarded_points);
}
// push the local array into what will be the global array
$voters[$voter_id] = $current_vote;
//if meta_data doesn't exist, update_post_meta creates one. if it does, it updates it.
update_post_meta(2165,'bonus_votesq'. $quarter . $year, $voters);
echo print_r($voters);
发生了什么事？
【问题讨论】：
-
变量 $voter_id 和 $vid both 是否表示“当前选民 ID 号”？ sanitize_key() 函数是否对键、值或两者都进行了清理？
-
你应该在
get_post_meta之后立即var_export($voters, true)，这样你每次都能看到你得到了什么。