Question

我查询了我的数据库并将结果存储到数组中。它看起来像这样：

$query1 = $wpdb->prepare( 
    "SELECT DISTINCT meta_value FROM {$wpdb->prefix}posts,{$wpdb->prefix}postmeta WHERE meta_key LIKE %s AND post_name = %s",
    'dich_vu_%_name_service',
    'bang-gia-dich-vu'
);
$query2 = $wpdb->prepare( 
    "SELECT DISTINCT meta_value FROM {$wpdb->prefix}posts,{$wpdb->prefix}postmeta WHERE meta_key LIKE %s AND post_name = %s",
    'dich_vu_%_price_service',
    'bang-gia-dich-vu'
);

$results = $wpdb->get_results( $query1.' UNION '.$query2);

这全部放在名为Array ( [0] => Array ( [Submission_ID] => 111 [First_Name] => Dylan [Last_Name] => Taylor [Abstract_Title] => Research 1 ) [1] => Array ( [Submission_ID] => 222 [First_Name] => Michael [Last_Name] => Jones [Abstract_Title] => Research 2 ) [2] => Array ( [Submission_ID] => 333 [First_Name] => Wills [Last_Name] => Adams [Abstract_Title] => Research 3 ) )的变量中。目前，我正在我的页面上显示一些数据：

$results

一切正常，但是，如果索引键被替换为提交ID：

，则很方便

echo $results[0][Abstract_Title]

所以我可以这样做（否则我必须打印数组只是为了每次都查找索引键）：

Array
(
[111] => Array
    (
        [Submission_ID] => 111
        [First_Name] => Dylan
        [Last_Name] => Taylor
        [Abstract_Title] => Research 1
    )

[222] => Array
    (
        [Submission_ID] => 222
        [First_Name] => Michael
        [Last_Name] => Jones
        [Abstract_Title] => Research 2
    )

[333] => Array
    (
        [Submission_ID] => 333
        [First_Name] => Wills
        [Last_Name] => Adams
        [Abstract_Title] => Research 3
    )
)

有什么想法吗？（我是编程新手。）我找到的最接近的答案是：php replace array id keys但我无法理解解决方案。我认为echo $results[111][Abstract_Title]是最好的选择吗？新数组应该放在同一个变量还是新变量中？

Answer 1

您可以像{/ p>一样使用array_combine和array_column

$final_result = array_combine(array_column($result,'Submission_ID'),$result);
print_r($final_result);

PHP：使用现有唯一值替换数组索引键

1 个答案: