MySql 查询或合并数组为 1

Question

我使用 ACF Pro，在数据库 wp_postmeta 中我有 2 个 meta_key：dich_vu_%_name_service 和 dich_vu_%_price_service。两者都有 value ，所以我如何查询并将其返回为 (dich_vu_%_name_service,dich_vu_%_price_service)。或者，如果 MySQL 无法处理它，那么我如何将这些查询的 2 个数组合并为一个这样的数组？

array(objects(['name_service'] => Test,['price_service'] => 9999))

这是我尝试过的代码

function getAllFaqs() {
global $wpdb;
    $results = $wpdb->get_results( $wpdb->prepare( 
    "SELECT DISTINCT meta_value FROM {$wpdb->prefix}posts,{$wpdb->prefix}postmeta WHERE meta_key LIKE %s AND post_name = %s",
    'dich_vu_%_name_service',
    'bang-gia-dich-vu'
));
    $results2 = $wpdb->get_results( $wpdb->prepare( 
    "SELECT DISTINCT meta_value FROM {$wpdb->prefix}posts,{$wpdb->prefix}postmeta WHERE meta_key LIKE %s AND post_name = %s",
    'dich_vu_%_price_service',
    'bang-gia-dich-vu'
));

    $array = array();
    foreach ($results as $result) {
        $array[]['name_service'] = $result->meta_value;
    }
    $array = $array;
    $array2 = array();
    foreach ($results2 as $result2) {
        $array2[]['price_service'] = $result2->meta_value;
    }
    $array2 = $array2;
    $array3 = array_combine($array,$array2);

感谢您的帮助！

Answer 1

联合是你的朋友，你可以将这两个查询结合起来（记住，两个结果集必须具有相同的列数和相同的类型并按顺序排列）：

$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);

查看docs

P.S：我不知道 wordpress，但看到 prepare 返回经过清理的查询字符串，因此两者之间的 UNION 应该可以工作

Answer 2

为什么你让它变得如此复杂。只需像这样作为 WordPress 标准使用

global $wpdb;
// Instead of passing post slug, you need to use post id here
$myvals1 = get_post_meta($post->ID,"dich_vu_%_name_service", true);
$myvals2 = get_post_meta($post->ID,"dich_vu_%_price_service", true);

$obj = new StdClass();
$obj->name_service = $myvals1;  
$obj->price_service = $myvals2;  

$res = array($obj);

// result 
array(1) {
  [0]=>
  object(stdClass)#245 (2) {
    ["name_service"]=>
    string(4) "Test"
    ["price_service"]=>
    string(4) "9999"
  }
}