合并2个数组返回空php

我存储了两个这样的阵列：

$gooff = array();

for($j=1;$j<=count($search_res);$j++)
{
   $post_id = $wpdb->get_results("SELECT DISTINCT post_id,meta_value from wp_postmeta Where meta_value"); 

$gooff = array_merge($post_id, $gooff);

}

我想我做的每件事都是对的。那么是什么导致了这个空结果呢？是的，我的

post\u id

数组中有值

发布id结果：

Array
(
    [0] => stdClass Object
        (
            [post_id] => 1129
            [meta_value] => java,php,html,css,mysql,jsp,cricket
        )

    [1] => stdClass Object
        (
            [post_id] => 1143
            [meta_value] => PHP,AJAX,MY,PROFILE,JAVA
        )

    [2] => stdClass Object
        (
            [post_id] => 1149
            [meta_value] => MY,PROFILE,PHP,DEVELOPER
        )

    [3] => stdClass Object
        (
            [post_id] => 1202
            [meta_value] => php,html&css
        )

    [4] => stdClass Object
        (
            [post_id] => 1209
            [meta_value] => php,html,wordpress,php,html,wordpress,php,html,wordpress,php,html,wordpress
        )

    [5] => stdClass Object
        (
            [post_id] => 1213
            [meta_value] => php,html,css,wordpress,jquery
        )

    [6] => stdClass Object
        (
            [post_id] => 1223
            [meta_value] => PHP,C++,C#,.Net,MYSQL
        )

)
Array
(
    [0] => stdClass Object
        (
            [post_id] => 1129
            [meta_value] => java,php,html,css,mysql,jsp,cricket
        )

    [1] => stdClass Object
        (
            [post_id] => 1143
            [meta_value] => PHP,AJAX,MY,PROFILE,JAVA
        )
)

---

您的sql查询正在返回对象而不是数组。在get_结果中将第二个参数作为数组_A传递

$post_id = $wpdb->get_results("SELECT DISTINCT post_id,meta_value from wp_postmeta Where meta_value",ARRAY_A);

---

为什么不直接使用

array\u push

？检查$post\u id是否已填充。print\r（$post\u id）的输出是什么？是的，它来自wordpress。第二个参数？我也使用了数组推送，但不起作用。但这并没有给我任何仍然为空的参数（合并变量）。count（$search\u res）的值是多少？只需检查它是否进入循环内部

$post_id = $wpdb->get_results("SELECT DISTINCT post_id,meta_value from wp_postmeta Where meta_value",ARRAY_A);