我正在使用以下代码进行tax\\u查询，但它似乎不再起作用了。。

在某种程度上，它是有效的，对我来说，它将不再有效。

<?php

global $pf_override;

class PF_override {

    public $site_terms = array();

    function __construct() {

        // add filters
        add_filter( \'init\', array( &$this, \'populates_site_terms\' ) );
        add_filter( \'pre_get_posts\', array( &$this, \'filter_query\' ) );
    }

    function populates_site_terms() {

        // my actual function does some processing and
        // checks caches and combines IDs from multiple
        // different sources here and then sets site_terms 

        $this->site_terms = array( 1, 2, 3 );
    }

    function filter_query( $query ) {

        // not the main query?
        if ( !$query->is_main_query() ) {
            return $query;
        }

        // have terms to filter by?
        if ( !empty( $this->site_terms ) ) {

            // construct tax_query
            $tax_query = array(
                \'taxonomy\'  => \'site_category\',
                \'field\'     => \'id\',
                \'terms\'     => $this->site_terms,
                \'operator\'  => \'IN\'
                );

            // this needs to be an array of arrays
            $taxquery = array(
                $tax_query
            );

            // set this..
            $query->set( \'tax_query\', $taxquery );
        }

        // return new query object
        return $query;
    }
}

// not the admin? init class
if ( !is_admin() ) {
    $pf_override = new PF_override();
}

?>

分类添加如下：

function PF_register_post_type() {
    $labels = array(
        \'name\'              => _x( \'Site Category\', \'taxonomy general name\' ),
        \'singular_name\'     => _x( \'Site Category\', \'taxonomy singular name\' ),
        \'search_items\'      => __( \'Search Site Categories\' ),
        \'all_items\'         => __( \'All Site Categories\' ),
        \'parent_item\'       => __( \'Parent Site Category\' ),
        \'parent_item_colon\' => __( \'Parent Site Category:\' ),
        \'edit_item\'         => __( \'Edit Site Category\' ),
        \'update_item\'       => __( \'Update Site Category\' ),
        \'add_new_item\'      => __( \'Add New Site Category\' ),
        \'new_item_name\'     => __( \'New Site Category Name\' ),
        \'menu_name\'         => __( \'Site Category\' ),
    );

    $args = array(
        \'hierarchical\'      => true,
        \'labels\'            => $labels,
        \'show_ui\'           => true,
        \'show_admin_column\' => true,
        \'query_var\'         => true,
        \'rewrite\'           => array( \'slug\' => \'sitecat\' ),
    );

    register_taxonomy( \'site_category\', array( \'post\', \'page\', \'attachment\', \'revision\', \'nav_menu_item\' ), $args );
}

add_action( \'init\', \'PF_register_post_types\', 1 );

在我的页脚中。php我添加了以下代码：

$GLOBALS[\'wp_query\']->request

我在访问mydomain时得到了这个结果。com/测试：

SELECT wp_posts.* FROM wp_posts  WHERE 1=1  AND wp_posts.post_name = \'testing\' AND wp_posts.post_type = \'post\' ORDER BY wp_posts.post_date DESC

$pf\\U override变量显示$pf\\U override->要设置为

array( [0] => 1, [1] => 2, [2] => 3 )

<?php

global $pf_override;

class PF_override {

    public $site_terms = array();

    public $sql_join    = \'\';
    public $sql_where   = \'\';

    function __construct() {

        // add filters
        add_filter( \'init\', array( &$this, \'populates_site_terms\' ) );
        add_filter( \'pre_get_posts\', array( &$this, \'filter_query\' ) );
        add_filter( \'posts_join\', array( &$this, \'filter_join\' ) );
        add_filter( \'posts_where\', array( &$this, \'filter_where\' ) );
    }

    function populates_site_terms() {

        // my actual function does some processing and 
        // checks caches and combines IDs from multiple 
        // different sources here and then sets site_terms 

        $this->site_terms = array( 1, 2, 3 );
    }

    function filter_query( $query ) {

        // not the main query?
        if ( !$query->is_main_query() ) {
            return $query;
        }

        // have terms to filter by?
        if ( !empty( $this->site_terms ) ) {

            // construct tax_query
            $tax_query = array(
                \'taxonomy\'  => \'site_category\',
                \'field\'     => \'id\',
                \'terms\'     => $this->site_terms,
                \'operator\'  => \'IN\'
                );

            // this needs to be an array of arrays
            $taxquery = array(
                $tax_query
            );

            // set this..
            $query->set( \'tax_query\', $taxquery );

            if ( $query->is_singular ) {

                global $wpdb;

                $q = &$query->query_vars;

                $q[\'suppress_filters\'] = false;

                $query->parse_tax_query( $q );

                $clauses = $query->tax_query->get_sql( $wpdb->posts, \'ID\' );

                $this->sql_join     .= $clauses[\'join\'];
                $this->sql_where    .= $clauses[\'where\'];
            }
        }

        return $query;
    }

    function filter_join( $join ) {

        if ( !empty( $this->sql_join ) ) {
            $join .= $this->sql_join;
        }

        return $join;
    }

    function filter_where( $where ) {

        if ( !empty( $this->sql_where ) ) {
            $where .= $this->sql_where;
        }

        return $where;
    }
}

// not the admin? init class
if ( !is_admin() ) {
    $pf_override = new PF_override();
}

?>

add_action(\'pre_get_posts\', \'filter_query\');

function filter_query( $query ) {
  // **PLEASE NOTE**
  // $this->site_terms refers specifically to logic in the question
  if ( $query->is_main_query() && $query->is_singular && ! empty( $this->site_terms ) ) {
    $site = get_queried_object();
    $terms = wp_get_object_terms($site->ID, \'site_category\', array(\'fields\' => \'ids\') );
    if ( empty($terms) || empty( array_intersect($terms, $this->site_terms) ) ) {
        $query->set( \'page_id\', -1 ); // 404
    }
  }
}