如何从子域博客在主域中显示最近的帖子

Question

需要显示最近从我的子域到我的主域前端的帖子。我使用的是下面的代码，但它只选取了最近发布的主域名。有什么帮助可以获取子域最近的帖子吗？

<h2>Recent Posts</h2>
<ul>
<?php
$args = array( 'numberposts' => '5' );
$recent_posts = wp_get_recent_posts( $args );
foreach( $recent_posts as $recent ){
echo '<li><a href="' . get_permalink($recent["ID"]) . '" title="Look '.esc_attr($recent["post_title"]).'" >' .   $recent["post_title"].'</a> </li> ';
}
?>
</ul>

Answer 1

编辑2:

事实证明，你并不是在同一个WordPress安装中运行两个网站(也被称为WordPress网络)。以下是我可以建议您在这种情况下使用的内容。

将此代码放入主站点的functions.php:

/**
* this function retrieves the requested part of the main site
* ok, well basically can be from any site, depending on the $url param, as long as it has the proper function that will display the requested content
* @param $url - the url of the site
* @param $key - part of the name of the function that will display the content
* @param $add_qs - any additional query string that will be appended, use "&params=param1,param2,param3" to pass "param1", "param2" and "param3"
* to the loading function
*/
function get_main_site_part($url, $key, $add_qs = '') {
// cache the result, so we don't make a request with each page load
$cache = ABSPATH . 'wp-content/uploads/main_site_' . $key . '.txt';
$cache_lifetime = 300;
// just to make sure - try to remove the trailing slash in the $url
$url = untrailingslashit($url);
$uri = $url . '/?including_template_part=1&load_part=' . $key . $add_qs;
# reload the cache on every 5 minutes
if (!file_exists($cache) || time() - filemtime($cache) > $cache_lifetime) {
$main_site_html = wp_remote_get($uri);
if (is_a($main_site_html, 'WP_Error')) {
//print_r($main_site_html);
//exit('error! ');
return;
}
$fp = fopen($cache, 'w');
fwrite($fp, $main_site_html);
fclose($fp);
} else {
$main_site_html = file_get_contents($cache);
}
return $main_site_html;
}

现在将此函数放在子域的functions.php:中

/* HTML LOADING HOOK - For loading content from one site to another - best application in multisite */
function print_requested_template_part() {
// Respond only to requests from the same address... 
if ( $_SERVER['REMOTE_ADDR'] == $_SERVER['SERVER_ADDR'] && $_SERVER['REQUEST_METHOD'] == 'GET' && isset($_GET['including_template_part']) && isset($_GET['load_part']) && $_GET['load_part'] != '' ) {
$part = $_GET['load_part'];
$func = 'render_' . str_replace('-', '_', $part); // if you have declared a function called "render_footer_include", then "?load_part=footer_include"
if ( function_exists($func) ) {
// Allow for passing parameters to the function
if ( isset($_GET['params']) ) {
$params = $_GET['params'];
$params = ( strpos($params, ',') !== false )? explode(',', $params) : array($params);
call_user_func_array($func, $params);
} else {
call_user_func($func);
}
}
exit; // if we don't exit here, a whole page will be printed => bad! it's better to have empty footer than a footer with the whole main site...
}
}
add_action('init', 'print_requested_template_part', 1);
function render_my_recent_posts( $numberposts = 5 ) { ?>
<h2>Recent Posts</h2>
<ul>
<?php
$args = array( 'numberposts' => '5' );
$recent_posts = wp_get_recent_posts( $args );
foreach( $recent_posts as $recent ) {
echo '<li><a href="' . get_permalink($recent["ID"]) . '" title="Look '.esc_attr($recent["post_title"]).'" >' .   $recent["post_title"].'</a> </li> ';
}
?>
</ul><?php
}

然后在你的主站点调用这个功能，你想让你最近的帖子出现在哪里：

echo get_main_site_part( 'http://questions.admissiontimes.com/', 'my_recent_posts', '&params=5' )

编辑1:

使用您问题中的示例代码，结合我下面的解决方案，以下是最终代码的样子：

<?php 
switch_to_blog( 2 ); // Switch to the blog that you want to pull posts from. You can see the ID when you edit a site through the Network Admin - the URL will look something like "http://example.com/wp-admin/network/site-info.php?id=2" - you need the value of "id", in this case "2" ?>
<h2>Recent Posts</h2>
<ul>
<?php
$args = array( 'numberposts' => '5' );
$recent_posts = wp_get_recent_posts( $args );
foreach( $recent_posts as $recent ) {
echo '<li><a href="' . get_permalink($recent["ID"]) . '" title="Look '.esc_attr($recent["post_title"]).'" >' .   $recent["post_title"].'</a> </li> ';
}
?>
</ul>
<?php restore_current_blog(); // Restore the current blog ?>

现在，只要把代码放在原始代码所在的位置，一切都应该正常工作。

---

您需要使用switch_to_blog($blog_id)函数切换到有问题的博客，其中$blog_id是有问题的日志(子网站)的ID。

然后执行普通的get_posts/或等效的/函数，并以您想要的方式显示/存储帖子。

完成后，只需致电restore_current_blog()即可。