如果（is_page（** PAGE ID **））不起作用

您可以将其用于

 <?php 
global $post;

if( $post->ID == 346) { ?>

      <!-- do your stuff here -->

<?php } ?>
 

您可以在标头中的任何位置或任何其他位置使用此功能.

you can use this for

<?php 
global $post;

if( $post->ID == 346) { ?>

      <!-- do your stuff here -->

<?php } ?>

you can use this anywhere either in header or anywhere else.

一个更简单的解决方案是将title或slug作为参数传递给 is_page() .如果您在另一台服务器上复制该页面,则不会有任何问题.

 <?php
if (is_page( 'Page Title' ) ):
  # Do your stuff
endif;
?>
 

A simpler solution will be to pass the title or the slug as argument in is_page(). You won't have issues if you duplicate that page on another server.

<?php
if (is_page( 'Page Title' ) ):
  # Do your stuff
endif;
?>

诸如init 之类的钩子根本无法工作.

您必须至少钩在parse_query上.

一切都将起作用:

 is_page(198); # ID (int)
is_page('198'); # ID (string)
is_page('Some Title'); # Title, case-sensitive
is_page('some-title'); # Slug
 

但是它必须至少钩在parse_query或之后的任何其他钩子中.您可以在此处查看WordPress挂钩顺序: https://codex.wordpress.org/Plugin_API/Action_Reference

Hooks such as init will not work at all.

You have to hook at least on parse_query.

Everything bellow will work:

is_page(198); # ID (int)
is_page('198'); # ID (string)
is_page('Some Title'); # Title, case-sensitive
is_page('some-title'); # Slug

But it must be hooked at least in parse_query or any other hook after it. You can see WordPress hook order here: https://codex.wordpress.org/Plugin_API/Action_Reference

尝试使用is_single($post)

在您的情况下,is_single(346)或is_single('346')都应该起作用

更多信息

try to use is_single($post)

in your case is_single(346) or is_single('346') both should work

more here

首先,您必须了解 页面 和 帖子 之间的区别.完成此操作后,您可以选择使用 is_page 还是 is_single .

如果要处理WordPress页面,请在下面以这种方式编写.请注意,此示例使用数组以防万一,如果您想在许多页面中实现它:

 <?php if (is_page( array( 1, 529, 'or post title'  ) ) ) : ?>
    <!-- Do nothing -->
<?php else : ?>
    <!-- Insert your code here -->
<?php endif; ?>
 

但是,如果您希望它也对您的帖子生效,那么也可以添加以下行:

 <?php if (is_single( array( 1, 529, 'or post title'  ) ) ) : ?>
    <!-- Do nothing -->
<?php else : ?>
    <!-- Insert your code here -->
<?php endif; ?>
 

First you have to know the difference between a page and post. Once you have done that then you can choose whether to use is_page or is_single.

If you are dealing with WordPress pages, then write in this way below. Note, this example is using array just in case if you want to implement it in many pages:

<?php if (is_page( array( 1, 529, 'or post title'  ) ) ) : ?>
    <!-- Do nothing -->
<?php else : ?>
    <!-- Insert your code here -->
<?php endif; ?>

But if you need it to take effect also on your posts, then add this lines too:

<?php if (is_single( array( 1, 529, 'or post title'  ) ) ) : ?>
    <!-- Do nothing -->
<?php else : ?>
    <!-- Insert your code here -->
<?php endif; ?>

请尝试从ID号＆amp;中删除''(单引号)会起作用:

 is_page(34)
 

Please try to remove '' (single quotes) from ID number & it will work:

is_page(34)

对于单个帖子使用

 if ( is_single( '1346' ) )
 

对于单页使用

 if ( is_page( '1346' ) )
 

'1346'是您的帖子或页面ID.

is_page 不适用于单个帖子,并且is_single 不适用于单个页面.

For single posts use

if ( is_single( '1346' ) )

For single pages use

if ( is_page( '1346' ) )

Where '1346' is your post or page ID.

is_page will NOT work with single posts and is_single will not work with single pages.

 function test_run(){

   if (is_page( 'Page Title' ) ): //you can use is_page(int post id/slug/title)
      # Do your stuff
   endif;

}

add_action('parse_query', 'test_run');
 

完成@Lucas Bustamante的答案

function test_run(){

   if (is_page( 'Page Title' ) ): //you can use is_page(int post id/slug/title)
      # Do your stuff
   endif;

}

add_action('parse_query', 'test_run');

completing @Lucas Bustamante 's answer