从类别页面或与此相关的任何页面上单击单个帖子时，您可以获取该引荐来源网址并对其进行解析以获取查询字符串。但这仅适用于默认的永久链接结构

引荐来源网址为类别页面时的示例：

A var_dump( parse_url( wp_get_referer() ) );提供以下具有默认永久链接结构的输出

array(4) {
  ["scheme"]=>
  string(4) "http"
  ["host"]=>
  string(9) "localhost"
  ["path"]=>
  string(11) "/wordpress/"
  ["query"]=>
  string(5) "cat=7"
}

将var_dump()永久链接设置为/%postname%/，这就是您得到的

array(3) {
  ["scheme"]=>
  string(4) "http"
  ["host"]=>
  string(9) "localhost"
  ["path"]=>
  string(32) "/wordpress/category/uit-my-lewe/"
}

我可以path将第二个代码块中的与一起使用get_category_by_path()，我可以获取类别对象

我的问题是，对于分类术语，我该如何处理。

我已经做了测试。我有一个自定义分类法event_cat。如果我把它重写event-slug，我下面得到path使用/%postname%/作为固定链接结构

/wordpress/event-slug/5-star/

和

event_cat=5-star

使用默认结构

自动地，我的分类名称不会出现在URL中，而只是我的术语的意思。因此，这不是从术语中获取对象的非常安全的方法。

我的问题是，如何正确获取默认的固定链接结构得到查询字符串或查询字符串或分类和术语的名字从/%postname%/固定链接结构

首先，我不得不说这wp_get_referer()不是100％可靠的，因为它依赖于php.net docs中的$_SERVER['HTTP_REFERER']那不是100％可靠的：

页面的地址（如果有），该页面将用户代理引至当前页面。这是由用户代理设置的。并非所有的用户代理都将设置此功能，有些用户代理提供了将HTTP_REFERER修改为功能的功能。简而言之，它不能真正被信任。

替代解决方案

如果您可以向帖子url添加一个查询参数，说明帖子的来源，那么它将更可靠，并且您无需解析 url就可以获取term对象。

例：

add_filter('post_link', function($permalink) {
  if (is_category() && ($cat = get_queried_object())) {
    $permalink = esc_url(add_query_arg(array('catfrom' => $cat->term_id), $permalink));
  }
  return $permalink;
});

这样做，从类别页面单击的发布永久链接会将您发送到类似

http://example.com/wordpress/post-name?catfrom=12

而且您可以轻松了解用户的来源，而无需依赖$_SERVER['HTTP_REFERER']和进行任何其他工作。

回答你的问题

从url开始获取查询信息是WordPress在WP::parse_request()方法内部所做的事情。

该方法只能用于“主要” URL（用户正在查看的URL），而不能用于任意URL。

几个月前，我写了Url To Query插件，目的是对任意网址执行相同的操作。

我要做的就是把WP::parse_request()，并将其重构为更合理的 OOP代码，并使其与任意url一起使用（例如，要处理的url作为参数接收，而不是从$_SERVERvar接收）。

使用我的插件，您可以

$args = url_to_query('/wordpress/event-slug/5-star/');

var_dump($args); // array( 'event_slug' => '5-star' );

因此，您可以new WP_Query从url开始获取查询参数（您可以直接传递给的东西），而这正是这样WP::parse_request()做的。

在您的情况下，您可能无需实际运行查询即可检查args数组。

这肯定可以工作，但是我认为解析URL所需的额外工作以及的不可靠性$_SERVER['HTTP_REFERER']使第一个解决方案更适合您的范围。

这个问题的初衷是要知道从哪儿转出一个职位，然后根据该职位，根据职位引荐来源人提供下一和上一个职位。

我想要完成的是例如：

从类别，分类，标签，搜索或作者存档页面中单击帖子。这些档案充当引荐来源。现在，通常会使用（如我的问题）wp_get_referer()来获取该引荐来源并将其用于进一步的查询中。如@GM在上面接受的答案中所述，此方法不可靠，所以我去了并使用了他的Alternative Solution。

另一个问题是需要使用某种Cookie或会话来存储此引荐来源网址，以便当您离开从特定存档中单击的原始单个帖子时，仍可以从原始引荐来源来源发帖。由于cookie也受最终用户控制，因此不可靠，并且WordPress默认不使用会话，因此我使用@GM Alternative Solution重构了下一个和上一个帖子链接，以提供一种可靠的方式来检查和存储我的原始内容推荐人。

这就是我想出的，我希望有人会在不久的将来发现它有用。请仅使用一个请求，即可使用和滥用满足您需要的代码：保留指向此问题的链接。:-)

有关代码的注意事项

• 这段代码很长而且很繁琐，因此我不再赘述。该代码已得到很好的注释

• 此代码可以选择在同一期限内的帖子之间进行分页，就像默认 next_post_link()previous_post_link() WordPress中和功能。就像本机函数一样，您必须设置分类法。的默认值in_same_term是true和分类法是category

• 最重要的是，此代码需要PHP 5.4+

代码

<?php
/**
 * @author Pieter Goosen
 * @license GPLv2 
 * @link http://www.gnu.org/licenses/gpl-2.0.html
 *
 * The functions on this page returns the next and previous post links
 * depending on what has been set
 *
 * @return function single_post_navigation()
*/ 

/**
 * Register six new query variables aq, ,cq, tq, ttq, taq, and sq set by 
 * the term_referer_link function
 *
 * @see http://codex.wordpress.org/WordPress_Query_Vars
 *
*/ 
add_filter( 'query_vars', function ( $vars ) {

    $vars[] = 'cq'; // Will hold category ID
    $vars[] = 'tq'; // Will hold taxonomy name
    $vars[] = 'ttq'; // Will hold term slug
    $vars[] = 'sq'; // Will hold search query
    $vars[] = 'aq'; // Will hold author name
    $vars[] = 'taq'; // Will hold tag id


    return $vars;

}, 10, 3 );

/**
 * Conditional tag to check whether or not a query_var has been set
 *
 * @param string $query_var query_var to check
 * @return (bool) true if query_var exists, false on failure
 *
*/
function has_query_var( $query_var ) {

    $array = $GLOBALS['wp_query']->query_vars;

    return array_key_exists( $query_var, $array );

}

/**
 * For posts being clicked from a category page, the query_var, 'cq' is set. 
 * 'cq' holds the category ID
 *
 * Set two query_var, 'tq' and 'ttq' to single posts that was clicked on from 
 * taxonomy pages. 'tq' holds the taxonomy name while 'ttq' holds the term name
 *
 * For search queries, the query_var, 'sq' is set to single posts that was clicked on from 
 * the search page. 'sq' holds the search query value
 *
 * For posts being clicked from an author page, the query_var, 'aq' is set. 
 * 'aq' holds the author ID
 *
 * For posts being clicked from a tag page, the query_var, 'taq' is set. 
 * 'taq' holds the tag ID
 *
 * This function replaces the wp_get_referer() and $_SERVER['HTTP_REFERER']
 * functions that are not very reliable
 * @see php.net manual $_SERVER['HTTP_REFERER']
 * @link http://php.net/manual/en/reserved.variables.server.php
 *
 * @uses add_query_arg()
 * @uses post_link
 * @uses post_type_link
 *
*/
add_filter( 'post_type_link', 'term_referer_link', 10, 3 );
add_filter( 'post_link', 'term_referer_link', 10, 3 );

function term_referer_link( $permalink, $post ) {

    switch ( true ) {

        case ( is_category() ):

            $category = get_queried_object_id();

            $args = [
                'cq'    => $category, 
            ];

            break;
        case ( is_tax() ):

            $term = get_queried_object();

            $args = [
                'tq'    => $term->taxonomy, 
                'ttq'   => $term->slug
            ];

            break;

        case ( is_search() ):

            $search = get_search_query();

            $args = [
                'sq'    => $search, 
            ];

            break;

        case ( is_author() ):

            $author = get_queried_object_id();

            $args = [
                'aq'    => $author,
            ];

            break;

        case ( is_tag() ):

            $tag = get_queried_object_id();

            $args = [
                'taq'   => $tag,
            ];

            break;

    }

    if( isset( $args ) ) { 

        $permalink  = add_query_arg( $args, $permalink );

    }

    return $permalink;

}

/**
 * @access private
 * This function is marked private and should not be used in any other functions
 *
 * This is a helper function for the main navigation function 
 * 
 * This function checks if any of the query variables is set in the single
 * post page URL. If they exist, the values are retrieved that were set
 * by the query variables
 *
 * These query variables are converted into query arguments for the query that will
 * be used to determine the current post position and the posts adjacent to the
 * current post which will translate in the next and previous post. 
 * 
 * When no query variables are present, an empty array of arguments is returned
 * 
 * @uses has_query_var()
 * @return (array) $add_query_args_to_args Query variable to determine the next/previous post links
 * @see http://codex.wordpress.org/Function_Reference/add_query_arg
 *
*/
function _query_vars_to_query_args() {

    switch ( true ) {

        case ( has_query_var( 'cq' ) ): // For category referrer

            $category = get_query_var( 'cq' );

            $add_query_args_to_args = [
                'cat' => $category,
            ];

            break;

        case ( has_query_var( 'tq' ) && has_query_var( 'ttq' ) ): // For taxonomy term referrer

            $taxonomy   = get_query_var( 'tq' );
            $term       = get_query_var( 'ttq' );

            $add_query_args_to_args = [
                'tax_query' => [
                    [
                        'taxonomy'          => $taxonomy,
                        'field'             => 'slug',
                        'terms'             => $term,
                        'include_children'  => false,
                    ],
                ],
            ];

            break;

        case ( has_query_var( 'sq' ) ): // For search referrer

            $search = get_query_var( 'sq' );

            $add_query_args_to_args = [
                's' => $search,
            ];

            break;

        case ( has_query_var( 'aq' ) ): // For author referrer

            $author = get_query_var( 'aq' );

            $add_query_args_to_args = [
                'author' => $author,
            ];

            break;

        case ( has_query_var( 'taq' ) ): // For tag referrer

            $tag = get_query_var( 'taq' );

            $add_query_args_to_args = [
                'tag_id' => $tag,
            ];

            break;

        default: // Default: returns empty array on any other archive or homepage

            $add_query_args_to_args = [];

            break;

    }

    return $add_query_args_to_args;

}
/**
 * @access private
 * This function is marked private and should not be used in any other functions
 *
 * This is a helper function for the main pagination function. This function 
 * checks if the defined query variables has been set in the URL of a single
 * post
 * 
 * If any of the query variables are found on any given single post page, then 
 * these query variables will be set to the next and previous post links according
 * to the single post's query variables
 * 
 * This way, next and previous posts will be shown from the same category, term, 
 * search query or author archive from which the original single post was referred 
 * from. 
 *
 * If a single post was referred from any other archive or main page, these query 
 * variables will not be set, and function will default to an empty array and no
 * query variables will be set to the next and previous post links
 *
 * @uses has_query_var()
 * @return (array) $qv Query variable to add to next/previous post links
 * @see http://codex.wordpress.org/Function_Reference/add_query_arg
 *
 * @todo Other archives can be added later
*/
function _add_query_vars_to_nav_links() {

    switch ( true ) {

        case ( has_query_var( 'cq' ) ): // For category referrer

            $category = get_query_var( 'cq' );

            $qv = [
                'cq'    => $category, 
            ];

            break;

        case ( has_query_var( 'tq' ) && has_query_var( 'ttq' ) ): // For taxonomy term referrer

            $taxonomy   = get_query_var( 'tq' );
            $term       = get_query_var( 'ttq' );

            $qv = [
                'tq'    => $term->taxonomy, 
                'ttq'   => $term->slug
            ];

            break;

        case ( has_query_var( 'sq' ) ): // For search referrer

            $search = get_query_var( 'sq' );

            $qv = [
                'sq'    => $search, 
            ];

            break;

        case ( has_query_var( 'aq' ) ): // For author referrer

            $author = get_query_var( 'aq' );

            $qv = [
                'aq'    => $author,
            ];

            break;

        case ( has_query_var( 'taq' ) ): // For tag referrer

            $tag = get_query_var( 'taq' );

            $qv = [
                'taq'   => $tag,
            ];

            break;


        default: // Default: returns empty array on any other archive or homepage

            $qv = [];

            break;

    }

    return $qv;

}

/**
 * This function returns navigation links to the next/previous single post
 * There are choices to which taxonomy to use, and whether adjacent posts should
 * be of the same term or not
 * 
 * When in_same_term is set to true, you have a choice to use the parent term or
 * child term if a post belongs to both. If the parent term is not available, the child term 
 * is automatically used
 *
 * @param array $defaults An array of key => value arguments. Defaults below 
 * - bool in_same_term       Whether or not next/previous post should be in the same term Default true
 * - bool parent_term        If in_same_term is true, should the parent or child terms be used Default true
 * - string/array taxonomy   The taxonomy from which terms to use Default category
 * - string/array post_types Post types to get posts from. Uses current post's post type on empty string. Default empty string 
 * - string previous_text    Text to display with previous post Default 'Previous post'
 * - string next_text        Text to display with next post Default 'Next post'
 *
 * @return string $links
*/ 
function get_single_post_navigation( $args = [] ) {

    // Sets the default arguments for default usage
    $defaults = [
        'in_same_term'      => true,
        'parent_term'       => true,
        'post_types'         => '',
        'taxonomy'          => 'category',
        'previous_text'     => __( 'Previous post' ),
        'next_text'         => __( 'Next post' ),
    ];

    // Merges the default arguments with user defined variables
    $args = wp_parse_args( $args, $defaults );

    /**
     * Get the currently displayed single post. For this use 
     * get_queried_object() as this is more safe than the global $post
     *
     * The $post global is very easily changed by any poorly written custom query
     * or function, and is there for not reliable
     *
     * @see Post below on WPSE for explanation
     * @link /wordpress//q/167706/31545
    */ 
    $single_post = get_queried_object();

    /**
     * Use the post type of the current post or post types entered in args
     *
    */ 
    $post_type   = ( empty( $args['post_types'] ) ) ? $single_post->post_type : $args['post_types'];


    // Set the variable query variables according to condition
    if( !empty( _query_vars_to_query_args() ) ) {

        $query_args = _query_vars_to_query_args(); 

    }elseif( true === $args['in_same_term'] ) {

        $terms =  wp_get_post_terms( $single_post->ID, $args['taxonomy'] ); 

        if ( ! empty( $terms ) && ! is_wp_error( $terms ) ){

            foreach ( $terms as $term ) {
                if( $term->parent === 0 ) {
                    $parent[] = $term;
                }else{
                    $child[] = $term;
                }
            }   

            $term_id = ( $args['parent_term'] === true && isset( $parent ) ) ? $parent[0]->term_id : $child[0]->term_id;

            $query_args = [ 
                'tax_query' => [
                    [
                        'taxonomy'          => $args['taxonomy'],
                        'field'             => 'term_id',
                        'terms'             => $term_id,
                        'include_children'  => false,
                    ],
                ],
            ];
        }

    }else{

        $query_args = [];

    }

    // Default arguments to use with all the conditional statements above
    $default_query_args = [ 
        'post_type'         => $post_type,
        'fields'            => 'ids',
        'posts_per_page'    => -1,
        'suppress_filters'  => true,
    ];

    // Merges the default arguments with the arguments from the conditional statement
    $combined_args = wp_parse_args( $query_args, $default_query_args );

    $q = new WP_Query( $combined_args );

    // Get the current post position. Will be used to determine adjacent posts
    $current_post_position = array_search( $single_post->ID, $q->posts );

    // Get the returned values from '_add_query_vars_to_nav_links()' to build links
    $get_qv = _add_query_vars_to_nav_links(); 

    // Get the next/older post ID
    if ( array_key_exists( $current_post_position + 1 , $q->posts ) ) {
        $next = $q->posts[$current_post_position + 1];
    }

    // Get post title link to the next post
    if( isset( $next ) ) {

        $next_post      = get_post( $next );
        $next_post_link = ( !empty( $get_qv ) ) ? add_query_arg( $get_qv, get_permalink( $next ) ) : get_permalink( $next );
        $next_title     = '<span class="meta-nav">' . $args['next_text'] . ': </span><a href="' . $next_post_link . '">' . $next_post->post_title . '</a></br>';

    }else{

        $next_title     = '';

    }

    // Get the previous/newer post ID
    if ( array_key_exists( $current_post_position - 1 , $q->posts ) ) {
        $previous = $q->posts[$current_post_position - 1];
    }

    // Get post title link to the previous post
    if( isset( $previous ) ) {

        $previous_post      = get_post( $previous );
        $previous_post_link = ( !empty( $get_qv ) ) ? add_query_arg( $get_qv, get_permalink( $previous ) ) : get_permalink( $previous );
        $previous_title     = '<span class="meta-nav">' . $args['previous_text'] . ': </span><a href="' . $previous_post_link . '">' . $previous_post->post_title . '</a></br>';

    }else{

        $previous_title     = '';

    }

    // Create the next/previous post links
    $links  = '<nav class="navigation post-navigation" role="navigation">';
    $links .= '<div class="nav-links">';
    $links .= $previous_title;
    $links .= $next_title;
    $links .= '</div><!-- .nav-links -->';
    $links .= '</nav><!-- .navigation -->';

    // Returns the post links with HTML mark-up
    return $links;

}

/** 
 * This function is simply just a wrapper for the main navigation
 * function and echo's the returned values from the main navigation
 * function
*/ 
function single_post_navigation( $args = [] ) {

    echo get_single_post_navigation( $args );

}

在单个模板中使用

如果您不需要浏览同一术语内的帖子，获取所有帖子类型的帖子并使用链接自定义下一个和上一个文本，则可以执行以下操作：

$args = [
    'in_same_term'     => false,
    'post_types'       => ['post', 'my_post_type'],
    'previous_text'      => __( 'Vorige Pos' ),
    'next_text'      => __( 'Volgende Pos' ),
];

single_post_navigation( $args );

编辑1

应SO职位要求，并作为 @todo，我已经引入了支持，不仅可以在当前帖子的帖子类型的帖子之间导航，还可以通过用户使用post_types函数中的参数设置的一系列帖子类型进行导航。请查看更新的代码。

编辑2

添加'suppress_filters' => true,到WP_Query参数，以便分页不会被内部使用的任何过滤器更改WP_Query