在Wordpress中使用当前帖子ID获取下一个/上一个帖子ID

问题描述

| 我想编写一个自定义的next / prev函数，以在fancybox弹出窗口中动态显示帖子信息。因此，我需要使用PHP根据当前显示的帖子获取下一个和上一个帖子ID。我知道当前的帖子ID是什么，可以将其发送给函数ok，但是我不知道如何使用该ID来获取相邻的ID。 编辑：这是到目前为止我的代码（不起作用）

<?PHP
require_once(\"../../../wp-blog-header.PHP\");

if (isset($_POST[\'data\'])){
    $post_id = $_POST[\'data\'];
}else{
    $post_id = \"\";
}
$wp_query->is_single = true;
$this_post = get_post($post_id);
$in_same_cat = false;
$excluded_categories = \'\';
$prevIoUs = false;
$next_post = get_adjacent_post($in_same_cat,$excluded_categories,$prevIoUs);


$post_id = $next_post->id;
$title = $next_post->post_title;

$dataset = array ( \"postid\"=>$post_id,\"posttitle\"=>$title );

//Because we want to use json,we have to place things in an array and encode it for json.
//This will give us a nice javascript object on the front side.

echo json_encode($dataset);


?>

    

解决方法

        

get_adjacent_post()

使用全局

$post

作为其参考点，因此您将需要替换它：

$this_post = get_post($post_id);

有了这个：

global $post;
$post = get_post($post_id);

WordPress还提供了

get_next_post()

和

get_previous_post()

，您可以在此处使用它们，而不必将

get_adjacent_post()

与所有这些参数一起使用。这是最终产品：

<?php
require_once(\"../../../wp-blog-header.php\");

if (isset($_POST[\'data\'])){
    $post_id = $_POST[\'data\'];
}else{
    $post_id = \"\";
}
$wp_query->is_single = true;

global $post;
$post = get_post($post_id);

$previous_post = get_previous_post();
$next_post = get_next_post();

$post_id = $next_post->id;
$title = $next_post->post_title;

$dataset = array ( \"postid\"=>$post_id,\"posttitle\"=>$title );

//Because we want to use json,we have to place things in an array and encode it for json.
//This will give us a nice javascript object on the front side.

echo json_encode($dataset);

?>

我不确定您要在

$dataset

数组中的上一个和下一个帖子的ID和标题中使用哪些键，所以我现在将其保留。     ,        为了使它起作用，我必须将ѭ10更改为

$next_post->ID;

，即将

ID

大写。 我像这样在index.php的Wordpress中使用了它–我在循环的顶部插入了它：

<div class=\"work-post\" id=\"<?php the_ID(); ?>\">

然后在循环中，我用这个： `             

        if (isset($_POST[\'data\'])){
            $post_id = $_POST[\'data\'];
        }else{
            $post_id = \"\";
        }
        $wp_query->is_single = true;

        global $post;
        $post = get_post($post_id);

        $next_post = get_next_post();
        $previous_post = get_previous_post();

        ?>

        <!-- call only if a value exists -->
            <?php if($next_post) : ?>
                <a href=\"#<?php echo $next_post->ID;?>\" class=\"anchorLink\"><div>PREV.</div></a>
            <?php endif; ?>
        <!-- call only if a value exists -->

        <!-- call only if a value exists -->
            <?php if($previous_post) : ?>
                <a href=\"#<?php echo $previous_post->ID;?>\" class=\"anchorLink\"><div>NEXT</div></a>
            <?php endif; ?>
        <!-- call only if a value exists -->`

    ,        这是我的代码，效果很好。 $ post_id是当前帖子ID。

function get_previous_post_id( $post_id ) {
    // Get a global post reference since get_adjacent_post() references it
    global $post;
    // Store the existing post object for later so we don\'t lose it
    $oldGlobal = $post;
    // Get the post object for the specified post and place it in the global variable
    $post = get_post( $post_id );
    // Get the post object for the previous post
    $previous_post = get_previous_post();
    // Reset our global object
    $post = $oldGlobal;
    if ( \'\' == $previous_post ) 
        return 0;
    return $previous_post->ID; 
} 

function get_next_post_id( $post_id ) {
    // Get a global post reference since get_adjacent_post() references it
    global $post;
    // Store the existing post object for later so we don\'t lose it
    $oldGlobal = $post;
    // Get the post object for the specified post and place it in the global variable
    $post = get_post( $post_id );
    // Get the post object for the next post
    $next_post = get_next_post();
    // Reset our global object
    $post = $oldGlobal;
    if ( \'\' == $next_post ) 
        return 0;
    return $next_post->ID; 
} 

然后，您只需调用函数。例：

echo get_previous_post_id( $current_id );
echo get_next_post_id( $current_id );

祝好运！