php WordPress 在循环外获取页面 ID
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WordPress Get the Page ID outside the loop
提问by Atif Mohammed Ameenuddin
I want to get the page ID before starting the loop in WordPress. I am using
我想在 WordPress 中开始循环之前获取页面 ID。我在用
$page = get_query_var('page_id');
Apparently, it returns nothing.
显然，它什么都不返回。
I just want to check a page for its ID and add a class to <body>tag based on it.
我只想检查一个页面的 ID 并<body>根据它添加一个类来标记。
回答by TheDeadMedic
If you're using pretty permalinks, get_query_var('page_id')won't work.
如果您使用的是漂亮的永久链接，get_query_var('page_id')则行不通。
Instead, get the queried object ID from the global :$wp_query
相反，从 global获取查询的对象 ID ：$wp_query
// Since 3.1 - recommended!
$page_object = get_queried_object();
$page_id = get_queried_object_id();
// "Dirty" pre 3.1
global $wp_query;
$page_object = $wp_query->get_queried_object();
$page_id = $wp_query->get_queried_object_id();
回答by Nadeem Khan
You can also create a generic function to get the ID of the post, whether its outside or inside the loop (handles both the cases):
您还可以创建一个通用函数来获取帖子的 ID，无论是在循环外还是在循环内（处理这两种情况）：
<?php
/**
* @uses WP_Query
* @uses get_queried_object()
* @see get_the_ID()
* @return int
*/
function get_the_post_id() {
if (in_the_loop()) {
$post_id = get_the_ID();
} else {
global $wp_query;
$post_id = $wp_query->get_queried_object_id();
}
return $post_id;
} ?>
And simply do:
简单地做：
$page_id = get_the_post_id();
回答by ryscript
Use this global $post instead:
改用这个全局 $post：
global $post;
echo $post->ID;
回答by banesto
If you by any means searched this topic because of the post page (index page alternative when using static front page), then the right answer is this:
如果您因帖子页面（使用静态首页时替代索引页面）而以任何方式搜索此主题，那么正确的答案是：
if (get_option('show_on_front') == 'page') {
$page_id = get_option('page_for_posts');
echo get_the_title($page_id);
}
(taken from Forrst | Echo WordPress "Posts Page" title - Some code from tammyhart)
回答by Jarrett Barnett
If you're on a page and this does not work:
如果您在页面上并且这不起作用：
$page_object = get_queried_object();
$page_id = get_queried_object_id();
you can try to build the permalink manually with PHP so you can lookup the post ID:
您可以尝试使用 PHP 手动构建永久链接，以便您可以查找帖子 ID：
// get or make permalink
$url = !empty(get_the_permalink()) ? get_the_permalink() : (isset($_SERVER['HTTPS']) ? "https" : "http") . "://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
$permalink = strtok($url, '?');
// get post_id using url/permalink
$post_id = url_to_postid($url);
// want the post or postmeta? use get_post() or get_post_meta()
$post = get_post($post_id);
$postmeta = get_post_meta($post_id);
It may not catch every possible permalink (especially since I'm stripping out the query string), but you can modify it to fit your use case.
它可能无法捕获所有可能的永久链接（特别是因为我正在剥离查询字符串），但您可以修改它以适合您的用例。
回答by Edd
I have done it in the following way and it has worked perfectly for me.
我以以下方式完成了它，它对我来说非常有效。
First declared a global variable in the header.php, assigning the ID of the post or page before it changes, since the LOOP assigns it the ID of the last entry shown:
首先在 header.php 中声明一个全局变量，在更改之前分配帖子或页面的 ID，因为 LOOP 为其分配了显示的最后一个条目的 ID：
$GLOBALS['pageid] = $wp_query->get_queried_object_id();
$GLOBALS['pageid] = $wp_query->get_queried_object_id();
And to use anywhere in the template, example in the footer.php:
并在模板中的任何地方使用，例如footer.php：
echo $GLOBALS['pageid];
echo $GLOBALS['pageid];
回答by Braj Kishor Sah
Use below two lines of code to get current page or post ID
使用以下两行代码获取当前页面或帖子 ID
global $post;
echo $post->ID;
回答by nikc.org
You can use is_page($page_id)outside the loop to check.
您可以使用is_page($page_id)循环外来检查。
回答by jruzafa
This function get id off a page current.
此函数从当前页面获取 id。
get_the_ID();
回答by Banna
This is the correct code.
这是正确的代码。
echo $post->ID;
