我正在开始使用高级自定义字段。我有一个类别字段（main\\u category），其中使用单选按钮选择下面给出的类别。

1. Electronics
2. Programming
3. Design

其中有这些类别的子类别。它们是使用每个类别的条件单选按钮设置的。子类别被编入索引，字段被赋予离子括号，

Post Type: article
Field Name: Category
Field key : main_category

1. Electronics - - - - - - - - (electronics)
        Linear Electronics - -      (elect_linear)
        Computer Networks- - -      (elect_networks)
        Microwave Engineering-      (elect_microwave)
        MicroProcessors- - - -      (elect_micropro)
2. Programming - - - - - - - - (programming)
        ObjectiveC - - - - - -      (prog_objc)
        Pythion  - - - - - - -      (prog_python)
        JavaScript - - - - - -      (prog_js)
        PHP  - - - - - - - - -      (prog_php)
3. Design     - - - - - -  - - (design)
        Illustrator  - - - - -      (desgn_ai)
        Photoshop   - - - - - -     (desgn_ps)
        After Effects   - - - -     (desgn_ae)
        Cinema 4d   - - - - - -     (desgn_cf)

进行了WP\\U查询，

$articles = array(
  \'numberposts\' => -1,
  \'post_type\' => \'article\',
  \'meta_key\' => \'main_category\',
);


$query_articles = new WP_Query( $articles);

它返回了一个数组$query\\u articles，其中包含所有帖子。，如何筛选数组$query\\u文章？因此，我会为php子类别中的文章添加“在php中标记”。？

据我所知，我所能做的就是查询具有不同类别的数组。。

$electronics = array(
  \'numberposts\' => -1,
  \'post_type\' => \'article\',
  \'meta_key\' => \'main_category\',
  \'meta_value\' => \'electronics\'
);
$programming = array(
  \'numberposts\' => -1,
  \'post_type\' => \'article\',
  \'meta_key\' => \'main_category\',
  \'meta_value\' => \'programming\'
);
$design = array(
  \'numberposts\' => -1,
  \'post_type\' => \'article\',
  \'meta_key\' => \'main_category\',
  \'meta_value\' => \'design\'
);



//query variables
$query_electronics = new WP_Query( $electronics);
$query_programming = new WP_Query( $programming);
$query_design = new WP_Query( $design );

但是，子类别总是一团糟，而且它也占用了大量资源。

附：这是我在localhost中开发的一个博客。感谢您的帮助和评论。

$electronics = array(
    \'numberposts\' => -1,
    \'post_type\' => \'article\',
    \'main_category\' => \'electronics\'
);
$query_electronics = new WP_Query( $electronics );

$electronics = array(
    \'numberposts\' => -1,
    \'post_type\' => \'article\',
    \'meta_query\' => array(
        \'key\' => \'main_category\',
        \'value\' => \'electronics\'
    ),
);
$query_electronics = new WP_Query( $electronics );

我正在开始使用高级自定义字段。我有一个类别字段（main\\u category），其中使用单选按钮选择下面给出的类别。

1. Electronics
2. Programming
3. Design

其中有这些类别的子类别。它们是使用每个类别的条件单选按钮设置的。子类别被编入索引，字段被赋予离子括号，

Post Type: article
Field Name: Category
Field key : main_category

1. Electronics - - - - - - - - (electronics)
        Linear Electronics - -      (elect_linear)
        Computer Networks- - -      (elect_networks)
        Microwave Engineering-      (elect_microwave)
        MicroProcessors- - - -      (elect_micropro)
2. Programming - - - - - - - - (programming)
        ObjectiveC - - - - - -      (prog_objc)
        Pythion  - - - - - - -      (prog_python)
        JavaScript - - - - - -      (prog_js)
        PHP  - - - - - - - - -      (prog_php)
3. Design     - - - - - -  - - (design)
        Illustrator  - - - - -      (desgn_ai)
        Photoshop   - - - - - -     (desgn_ps)
        After Effects   - - - -     (desgn_ae)
        Cinema 4d   - - - - - -     (desgn_cf)

进行了WP\\U查询，

$articles = array(
  \'numberposts\' => -1,
  \'post_type\' => \'article\',
  \'meta_key\' => \'main_category\',
);


$query_articles = new WP_Query( $articles);

它返回了一个数组$query\\u articles，其中包含所有帖子。，如何筛选数组$query\\u文章？因此，我会为php子类别中的文章添加“在php中标记”。？

据我所知，我所能做的就是查询具有不同类别的数组。。

$electronics = array(
  \'numberposts\' => -1,
  \'post_type\' => \'article\',
  \'meta_key\' => \'main_category\',
  \'meta_value\' => \'electronics\'
);
$programming = array(
  \'numberposts\' => -1,
  \'post_type\' => \'article\',
  \'meta_key\' => \'main_category\',
  \'meta_value\' => \'programming\'
);
$design = array(
  \'numberposts\' => -1,
  \'post_type\' => \'article\',
  \'meta_key\' => \'main_category\',
  \'meta_value\' => \'design\'
);



//query variables
$query_electronics = new WP_Query( $electronics);
$query_programming = new WP_Query( $programming);
$query_design = new WP_Query( $design );

但是，子类别总是一团糟，而且它也占用了大量资源。

附：这是我在localhost中开发的一个博客。感谢您的帮助和评论。

$electronics = array(
    \'numberposts\' => -1,
    \'post_type\' => \'article\',
    \'main_category\' => \'electronics\'
);
$query_electronics = new WP_Query( $electronics );

$electronics = array(
    \'numberposts\' => -1,
    \'post_type\' => \'article\',
    \'meta_query\' => array(
        \'key\' => \'main_category\',
        \'value\' => \'electronics\'
    ),
);
$query_electronics = new WP_Query( $electronics );