显示自定义帖子类型的子项和孙项

时间:2017-12-07 作者:user156

如何让孙子们出现在家长的帖子上,现在我只能让孩子们出现在家长的帖子上,孙子们出现在孩子的帖子上。

我想这样列一个清单:

父帖子(当前页面)
-子帖子1
-孙帖子1
-孙帖子2
-孙帖子3
-子帖子2
-孙帖子1
-孙帖子2
-孙帖子3

这是我目前的代码

<?php 
$args = array( \'post_parent\' => get_the_ID(), \'post_type\' => \'series\', \'posts_per_page\' => -1 );
$childs = new WP_Query( $args );
while ( $childs->have_posts() ) : $childs->the_post();
?>
<a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>

<?php endwhile;  wp_reset_postdata(); ?>
非常感谢您的帮助,谢谢!

更新时间:

<ul>Child1 title
<li>grandchild</li>
<li>grandchild2</li>
<li>grandchild3</li>
</ul>
<ul>Child2 title
<li>grandchild</li>
<li>grandchild2</li>
<li>grandchild3</li>
</ul>

1 个回复
最合适的回答,由SO网友:Shibi 整理而成

您可以为wp_list_pages() 此函数使用Walker_Page 你可以延长他的时间。

例如,您将其放在函数中。php I添加了带有类名的注释No_Link_First_Child_Walker 所以你可以看到我改变了什么,你可以搜索它们。

class No_Link_First_Child_Walker extends Walker_Page {
    public function start_el( &$output, $page, $depth = 0, $args = array(), $current_page = 0 ) {
        if ( isset( $args[\'item_spacing\'] ) && \'preserve\' === $args[\'item_spacing\'] ) {
            $t = "\\t";
            $n = "\\n";
        } else {
            $t = \'\';
            $n = \'\';
        }
        if ( $depth ) {
            $indent = str_repeat( $t, $depth );
        } else {
            $indent = \'\';
        }

        $css_class = array( \'page_item\', \'page-item-\' . $page->ID );

        if ( isset( $args[\'pages_with_children\'][ $page->ID ] ) ) {
            $css_class[] = \'page_item_has_children\';
        }

        if ( ! empty( $current_page ) ) {
            $_current_page = get_post( $current_page );
            if ( $_current_page && in_array( $page->ID, $_current_page->ancestors ) ) {
                $css_class[] = \'current_page_ancestor\';
            }
            if ( $page->ID == $current_page ) {
                $css_class[] = \'current_page_item\';
            } elseif ( $_current_page && $page->ID == $_current_page->post_parent ) {
                $css_class[] = \'current_page_parent\';
            }
        } elseif ( $page->ID == get_option(\'page_for_posts\') ) {
            $css_class[] = \'current_page_parent\';
        }

        /**
         * Filters the list of CSS classes to include with each page item in the list.
         *
         * @since 2.8.0
         *
         * @see wp_list_pages()
         *
         * @param array   $css_class    An array of CSS classes to be applied
         *                              to each list item.
         * @param WP_Post $page         Page data object.
         * @param int     $depth        Depth of page, used for padding.
         * @param array   $args         An array of arguments.
         * @param int     $current_page ID of the current page.
         */
        $css_classes = implode( \' \', apply_filters( \'page_css_class\', $css_class, $page, $depth, $args, $current_page ) );

        if ( \'\' === $page->post_title ) {
            /* translators: %d: ID of a post */
            $page->post_title = sprintf( __( \'#%d (no title)\' ), $page->ID );
        }

        $args[\'link_before\'] = empty( $args[\'link_before\'] ) ? \'\' : $args[\'link_before\'];
        $args[\'link_after\'] = empty( $args[\'link_after\'] ) ? \'\' : $args[\'link_after\'];

        $atts = array();
        $atts[\'href\'] = get_permalink( $page->ID );

        /**
         * Filters the HTML attributes applied to a page menu item\'s anchor element.
         *
         * @since 4.8.0
         *
         * @param array $atts {
         *     The HTML attributes applied to the menu item\'s `<a>` element, empty strings are ignored.
         *
         *     @type string $href The href attribute.
         * }
         * @param WP_Post $page         Page data object.
         * @param int     $depth        Depth of page, used for padding.
         * @param array   $args         An array of arguments.
         * @param int     $current_page ID of the current page.
         */
        $atts = apply_filters( \'page_menu_link_attributes\', $atts, $page, $depth, $args, $current_page );

        /**
         * No_Link_First_Child_Walker
         * Here I removed the the attribute for the href if the depth equal to 1
         */
        if($depth == 1) {
            unset($atts[\'href\']);
        }

        $attributes = \'\';
        foreach ( $atts as $attr => $value ) {
            if ( ! empty( $value ) ) {
                $value = esc_attr( $value );
                $attributes .= \' \' . $attr . \'="\' . $value . \'"\';
            }
        }

        /**
         * No_Link_First_Child_Walker
         * Here I add a condition to check if depth is 1 so the tag will be span
         */
        $output .= $indent . sprintf(
            \'<li class="%s">\'.(($depth == 1) ? \'<span%s>%s%s%s</span>\' : \'<a%s>%s%s%s</a>\'),
            $css_classes,
            $attributes,
            $args[\'link_before\'],
            /** This filter is documented in wp-includes/post-template.php */
            apply_filters( \'the_title\', $page->post_title, $page->ID ),
            $args[\'link_after\']
        );

        if ( ! empty( $args[\'show_date\'] ) ) {
            if ( \'modified\' == $args[\'show_date\'] ) {
                $time = $page->post_modified;
            } else {
                $time = $page->post_date;
            }

            $date_format = empty( $args[\'date_format\'] ) ? \'\' : $args[\'date_format\'];
            $output .= " " . mysql2date( $date_format, $time );
        }
    }

}
现在调用函数wp_list_pages() 这个步行者也是这样。

wp_list_pages(array(\'post_type\'=>\'series\', \'walker\'=>new No_Link_First_Child_Walker()));
或者你可以在第二个while内为孙子孙女做另一个while循环。

试试这个

class No_Link_First_Child_Walker extends Walker_Page {
    /**
     * Outputs the beginning of the current level in the tree before elements are output.
     *
     * @since 2.1.0
     *
     * @see Walker::start_lvl()
     *
     * @param string $output Used to append additional content (passed by reference).
     * @param int    $depth  Optional. Depth of page. Used for padding. Default 0.
     * @param array  $args   Optional. Arguments for outputting the next level.
     *                       Default empty array.
     */
    public function start_lvl( &$output, $depth = 0, $args = array() ) {
        if ( isset( $args[\'item_spacing\'] ) && \'preserve\' === $args[\'item_spacing\'] ) {
            $t = "\\t";
            $n = "\\n";
        } else {
            $t = \'\';
            $n = \'\';
        }
        $indent = str_repeat( $t, $depth );
        // No_Link_First_Child_Walker check depth and remove <ul> for depth 0
        if($depth !== 0) {
            $output .= "{$n}{$indent}<ul class=\'children\'>{$n}";
        }
    }

    /**
     * Outputs the end of the current level in the tree after elements are output.
     *
     * @since 2.1.0
     *
     * @see Walker::end_lvl()
     *
     * @param string $output Used to append additional content (passed by reference).
     * @param int    $depth  Optional. Depth of page. Used for padding. Default 0.
     * @param array  $args   Optional. Arguments for outputting the end of the current level.
     *                       Default empty array.
     */
    public function end_lvl( &$output, $depth = 0, $args = array() ) {
        if ( isset( $args[\'item_spacing\'] ) && \'preserve\' === $args[\'item_spacing\'] ) {
            $t = "\\t";
            $n = "\\n";
        } else {
            $t = \'\';
            $n = \'\';
        }
        $indent = str_repeat( $t, $depth );
        // No_Link_First_Child_Walker check depth and remove </ul> for depth 0
        if($depth !== 0) {
            $output .= "{$indent}</ul>{$n}";
        }

    }

    public function start_el( &$output, $page, $depth = 0, $args = array(), $current_page = 0 ) {

        if ( isset( $args[\'item_spacing\'] ) && \'preserve\' === $args[\'item_spacing\'] ) {
            $t = "\\t";
            $n = "\\n";
        } else {
            $t = \'\';
            $n = \'\';
        }
        if ( $depth ) {
            $indent = str_repeat( $t, $depth );
        } else {
            $indent = \'\';
        }

        $css_class = array( \'page_item\', \'page-item-\' . $page->ID );

        if ( isset( $args[\'pages_with_children\'][ $page->ID ] ) ) {
            $css_class[] = \'page_item_has_children\';
        }

        if ( ! empty( $current_page ) ) {
            $_current_page = get_post( $current_page );
            if ( $_current_page && in_array( $page->ID, $_current_page->ancestors ) ) {
                $css_class[] = \'current_page_ancestor\';
            }
            if ( $page->ID == $current_page ) {
                $css_class[] = \'current_page_item\';
            } elseif ( $_current_page && $page->ID == $_current_page->post_parent ) {
                $css_class[] = \'current_page_parent\';
            }
        } elseif ( $page->ID == get_option(\'page_for_posts\') ) {
            $css_class[] = \'current_page_parent\';
        }

        /**
         * Filters the list of CSS classes to include with each page item in the list.
         *
         * @since 2.8.0
         *
         * @see wp_list_pages()
         *
         * @param array   $css_class    An array of CSS classes to be applied
         *                              to each list item.
         * @param WP_Post $page         Page data object.
         * @param int     $depth        Depth of page, used for padding.
         * @param array   $args         An array of arguments.
         * @param int     $current_page ID of the current page.
         */
        $css_classes = implode( \' \', apply_filters( \'page_css_class\', $css_class, $page, $depth, $args, $current_page ) );

        if ( \'\' === $page->post_title ) {
            /* translators: %d: ID of a post */
            $page->post_title = sprintf( __( \'#%d (no title)\' ), $page->ID );
        }

        $args[\'link_before\'] = empty( $args[\'link_before\'] ) ? \'\' : $args[\'link_before\'];
        $args[\'link_after\'] = empty( $args[\'link_after\'] ) ? \'\' : $args[\'link_after\'];

        $atts = array();
        $atts[\'href\'] = get_permalink( $page->ID );

        /**
         * Filters the HTML attributes applied to a page menu item\'s anchor element.
         *
         * @since 4.8.0
         *
         * @param array $atts {
         *     The HTML attributes applied to the menu item\'s `<a>` element, empty strings are ignored.
         *
         *     @type string $href The href attribute.
         * }
         * @param WP_Post $page         Page data object.
         * @param int     $depth        Depth of page, used for padding.
         * @param array   $args         An array of arguments.
         * @param int     $current_page ID of the current page.
         */
        $atts = apply_filters( \'page_menu_link_attributes\', $atts, $page, $depth, $args, $current_page );

        /**
         * No_Link_First_Child_Walker
         * Here I removed the the attribute for the href if the depth equal to 1
         */
        if($depth == 1) {
            unset($atts[\'href\']);
        }

        $attributes = \'\';
        foreach ( $atts as $attr => $value ) {
            if ( ! empty( $value ) ) {
                $value = esc_attr( $value );
                $attributes .= \' \' . $attr . \'="\' . $value . \'"\';
            }
        }

        /**
         * No_Link_First_Child_Walker
         * Here I add a condition to check if depth is 1 so the tag will be h3
         * remove the <li> too for this depth
         */
        $output .= $indent . sprintf(
            (($depth == 1) ? \'<h3 class="%s">%s%s%s</h3>\' : \'<li class="%s"><a%s>%s%s%s</a>\'),
            $css_classes,
            $attributes,
            $args[\'link_before\'],
            /** This filter is documented in wp-includes/post-template.php */
            apply_filters( \'the_title\', $page->post_title, $page->ID ),
            $args[\'link_after\']
        );

        if ( ! empty( $args[\'show_date\'] ) ) {
            if ( \'modified\' == $args[\'show_date\'] ) {
                $time = $page->post_modified;
            } else {
                $time = $page->post_date;
            }

            $date_format = empty( $args[\'date_format\'] ) ? \'\' : $args[\'date_format\'];
            $output .= " " . mysql2date( $date_format, $time );
        }
    }

    public function end_el( &$output, $page, $depth = 0, $args = array() ) {
        if ( isset( $args[\'item_spacing\'] ) && \'preserve\' === $args[\'item_spacing\'] ) {
            $t = "\\t";
            $n = "\\n";
        } else {
            $t = \'\';
            $n = \'\';
        }
        // No_Link_First_Child_Walker check depth and remove closing </li> for depth 1
        if($depth !== 1) {
            $output .= "</li>{$n}";
        }
    }

}

结束