我很忙rewritting a custom function 我最近写了一篇文章，根据URL中保存的标签、类别、自定义分类术语、作者或搜索值来获取相邻的帖子

我使用的是get_adjacent_post 重写我的函数。

这是我的。这将成功检索相邻帖子的ID，并根据query_vars 在URL中设置。如果没有自定义query_vars 设置后，函数将按正常的时间顺序获取相邻的帖子

<?php    
function get_adjacent_include_referred_post( $previous = true ) {
    global $wpdb;

    if ( ( ! $post = get_post() ) )
        return null;

    $current_post_date = $post->post_date;

    $join = \'\';
    $where = \'\';

    //Alter the SQL query if \'aq\' is set in single page URL
    if( is_author_referrer() ) {

        $author = $_GET[\'aq\'];
        $where .= $wpdb->prepare( "AND p.post_author IN (%s)", $author );

    }

    //Alter the SQL query if \'tq\' is set in single page URL
    if( is_tax_referrer() ) {

        $term = $_GET[\'tq\'];
        $join = $wpdb->prepare( " INNER JOIN $wpdb->term_relationships AS tr ON p.ID = tr.object_id  AND tr.term_taxonomy_id IN (%s)", $term );

    }

    //Alter the the SQL query if sq is set in single page URL
    if( is_search_referrer() ) {

        $term = $_GET[\'sq\'];
        // **MISSING INFO** 
    }


    //Set next and previous post\'s operators to form the SQL query
    $adjacent   = $previous ? \'previous\' : \'next\';
    $op         = $previous ? \'<\' : \'>\';
    $order      = $previous ? \'DESC\' : \'ASC\';

    // Setting the default clauses to build the custom SQL query to get adjacent post
    $where = $wpdb->prepare( "WHERE p.post_date $op %s AND p.post_type = %s AND p.post_status = \'publish\' $where", $current_post_date, $post->post_type );
    $sort  = "ORDER BY p.post_date $order LIMIT 1";
    $query = "SELECT p.ID FROM $wpdb->posts AS p $join $where $sort";

    //Create and set cache to improve performance of the function
    $query_key = \'get_the_adjacent_post_\' . md5( $query );
    $result = wp_cache_get( $query_key, \'counts\' );

    $result = $wpdb->get_var( $query );
    if ( null === $result )
        $result = \'\';

    wp_cache_set( $query_key, $result, \'counts\' );

    return $result;

}