Wordpress sql，根据元值重新排序数组

Question

在我的 wordpress 函数文件中，我得到 sql 仅 post 个 ID 的查询结果，然后使用这些 ID 创建一个数组并发送到我的页面。

这非常有效，但我想根据我在数组过程中生成的值之一对其重新排序。我有一个 'featured' 的值，我想这样做，以便 featured = 1 的任何结果都在数组中排在第一位。

$myresults = $wpdb->get_results( $sqlStatement );
$ress = array();
$cnt = 0; 
$imgpath = '';
            
    if(count($myresults)>0){
        foreach ($myresults as $key => $value) {
            $id = $value->ID;
            if(get_post_meta($id,'_awpcp_extra_field[36]',true) !='' && get_post_meta($id,'_awpcp_extra_field[37]',true) != ''){
                        
                        
            $ress[$cnt]['featured']  = get_post_meta($id,'_awpcp_is_featured',true);
                        
            $imgpath = get_the_post_thumbnail_url($id,'dailymag-featured');
              if($imgpath){
                    $ress[$cnt]['imgs'] = $imgpath;
              }else{
                $ress[$cnt]['imgs'] = '/wp-content/uploads/2022/03/fairfax-4670d9c9.jpeg';
                }                       
                $cnt++;
            }
        }
    echo json_encode($ress);
    }

有没有一种方法可以简单地使用条件来将这些值放在数组的第一位？

Answer 1

在数组中使用函数 get_post_meta 是不好的做法。我建议首先查询数据库以从自定义字段中提取数据。

不过，我认为有两种方法可以回答你的问题：

使用2个数组并在迭代后将它们合并在一起：

    $myresults = $wpdb->get_results( $sqlStatement );
    $ress1 = $ress2 = array();
    $cnt = 0; 
    $imgpath = '';
    
    if(count($myresults)>0){
        foreach ($myresults as $key => $value) {
            $id = $value->ID;
            if(get_post_meta($id,'_awpcp_extra_field[36]',true) !='' && get_post_meta($id,'_awpcp_extra_field[37]',true) != ''){
                $is_featured = get_post_meta($id,'_awpcp_is_featured',true);
                $imgpath = get_the_post_thumbnail_url($id,'dailymag-featured');
    
                $array_name = !empty($is_featured) ? 'ress1' : 'ress2';
    
                $$array_name[$cnt]['featured']  = $is_featured;
                if($imgpath){
                    $$array_name[$cnt]['imgs'] = $imgpath;
                }else{
                    $$array_name[$cnt]['imgs'] = '/wp-content/uploads/2022/03/fairfax-4670d9c9.jpeg';
                }
                $cnt++;
            }
        }
        $ress = array_merge($ress1, $ress2);
        echo json_encode($ress);
    }

使用 2 个计数器：

    $myresults = $wpdb->get_results( $sqlStatement );
    $ress = array();
    $cnt1 = 0;
    $cnt2 = 1000000; 
    $imgpath = '';

    if(count($myresults)>0){
        foreach ($myresults as $key => $value) {
            $id = $value->ID;
            if(get_post_meta($id,'_awpcp_extra_field[36]',true) !='' && get_post_meta($id,'_awpcp_extra_field[37]',true) != ''){


                $is_featured = get_post_meta($id,'_awpcp_is_featured',true);
                $imgpath = get_the_post_thumbnail_url($id,'dailymag-featured');

                $counter_name = !empty($is_featured) ? 'cnt1' : 'cnt2';
                $ress[$$counter_name]['featured']  = get_post_meta($id,'_awpcp_is_featured',true);

                $imgpath = get_the_post_thumbnail_url($id,'dailymag-featured');
                if($imgpath){
                    $ress[$$counter_name]['imgs'] = $imgpath;
                }else{
                    $ress[$$counter_name]['imgs'] = '/wp-content/uploads/2022/03/fairfax-4670d9c9.jpeg';
                }
                $$counter_name++;
            }
        }
        $ress = array_values( $ress );
        echo json_encode($ress);
    }

Wordpress sql，根据元值重新排序数组

Wordpress sql, re-ordering array based on meta value

php

sql

arrays

wordpress