通过ID

您好 @Robin I.Knight:

我将get_the_excerpt()视为具有旧版设计的功能.随着WordPress使用量的增加,有很多新的用例不适合使用,但新的功能可以获取不同的数据.一个例子是现在经常使用$args函数选项数组.

但是很容易解决您的需求.您可以使用以下替代功能,将其放置在主题的functions.php文件中的任何位置:

 function robins_get_the_excerpt($post_id) {
  global $post;  
  $save_post = $post;
  $post = get_post($post_id);
  $output = get_the_excerpt();
  $post = $save_post;
  return $output;
}
 

我尚未对其进行测试,但可以肯定的是我做对了.如果这不能满足您的需求,请详细说明,也许我可以提出其他建议.

Hi @Robin I. Knight:

I view get_the_excerpt() as a function with legacy design. As WordPress usage has grown there are many newer use-cases where it doesn't fit but where the newer functions for getting different data do. One example is the now frequent use of an $args array of function options.

But it's easy to fix for your needs. Here's an alternative function you can use which you can put anywhere in your theme's functions.php file:

function robins_get_the_excerpt($post_id) {
  global $post;  
  $save_post = $post;
  $post = get_post($post_id);
  $output = get_the_excerpt();
  $post = $save_post;
  return $output;
}

I've not tested it but am pretty sure I got it right. If this doesn't meet your needs please elaborate and maybe I can make other suggestions.

摘录的技巧极其混乱.这不是您问题的精确答案,但是通常来说,如果您需要制作特定于Loop的模板标签,并使用get_posts()返回的数组,您可以像这样模拟Loop:

 $stories = get_posts(); 

foreach ($stories as $post) {

    setup_postdata($post);

    // stuff
}
wp_reset_postdata();
 

The mechanics of excerpt are extremely confusing. It is not precise answer to your question but in general if you need to make template tags, specific to Loop, work with array returned by get_posts() you can emulate Loop like this:

$stories = get_posts(); 

foreach ($stories as $post) {

    setup_postdata($post);

    // stuff
}
wp_reset_postdata();

自3.3.0版以来,有一个新功能: wp_trim_words

我正在循环外使用它,如下所示:

  <?php if ( $post_id ) {
 $post = get_post( $post_id );
 if ( $post ) { ?>
     <h2><?php echo $post->post_title; ?></h2>
     <p><em><?php echo wp_trim_words( $post->post_content ); ?></em></p>
     <p><strong>This article can only be read by subscribers.</strong></p>
 <?php } } ?>
 

这不要与 wp_trim_excerpt 混淆,后者显然只在循环内起作用,因为它在内部调用the_content()

There is a new function since 3.3.0: wp_trim_words

I'm using it outside the loop as follows:

 <?php if ( $post_id ) {
 $post = get_post( $post_id );
 if ( $post ) { ?>
     <h2><?php echo $post->post_title; ?></h2>
     <p><em><?php echo wp_trim_words( $post->post_content ); ?></em></p>
     <p><strong>This article can only be read by subscribers.</strong></p>
 <?php } } ?>

This is not to be confused with wp_trim_excerpt that apparently only works within the loop, since it calls the_content() internally.

仅添加到MikeSchinkel的答案中,由于某种原因,该答案对我不起作用.我必须添加setup_postdata行才能使其正常运行.

 function get_the_excerpt( $post_id ){

  global $post;  
  $save_post = $post;
  $post = get_post($post_id);
  setup_postdata( $post ); // hello
  $output = get_the_excerpt();
  $post = $save_post;
  return $output;
 

}

我假设如果您在循环之外使用它,那么它不应干扰正在进行的其他setup_postdata.

欢呼

Just to add to MikeSchinkel's answer, which for some reason wouldn't work for me. I had to add the setup_postdata line to make it work.

function get_the_excerpt( $post_id ){

  global $post;  
  $save_post = $post;
  $post = get_post($post_id);
  setup_postdata( $post ); // hello
  $output = get_the_excerpt();
  $post = $save_post;
  return $output;

}

I'm assuming if you're using this outside the loop then it shouldn't interfere with other setup_postdata going on.

Cheers

基于@Maxime的答案,这行得通吗?

 $post = get_post( $id );

$excerpt = ( $post->post_excerpt ) ? $post->post_excerpt : $post->post_content;
 

对我来说似乎很直截了当,但是我想知道我是否缺少某些东西.

Building on @Maxime's answer, would this work?

$post = get_post( $id );

$excerpt = ( $post->post_excerpt ) ? $post->post_excerpt : $post->post_content;

It seems straight forward enough to me, but I'm wondering if I'm missing something.

如果全部您的帖子带有<!--more-->标记,那么您可以在上面的代码中使用以下内容:

 $sjc_excerpt = explode( '<!--more-->', $post->post_content); 
echo wpautop( $sjc_excerpt[0] );
 

当然,如果您有任何没有<!--more-->标记的帖子,它们将完整显示.在我的情况下有效,但并非对所有人都适用...

If ALL your posts have the <!--more--> tag, then you can use the following with your code above:

$sjc_excerpt = explode( '<!--more-->', $post->post_content); 
echo wpautop( $sjc_excerpt[0] );

Of course if you have any posts that don't have the <!--more--> tag, they'll be shown in their entirety. Works in my situation, but not for all...

我将get_the_excerpt()视为具有旧版设计的功能.随着WordPress使用量的增加,有很多新的用例不适合使用,但新的功能可以获取不同的数据.一个例子是现在经常使用$args函数选项数组.

但是很容易解决您的需求.您可以使用以下替代功能,将其放置在主题的functions.php文件中的任何位置:

 function robins_get_the_excerpt($post_id) {
   global $post;  
   $save_post = $post;
   $post = get_post($post_id);
   $output = get_the_excerpt();
   $post = $save_post;
   return $output;
}
 

仅添加到MikeSchinkel的答案中,由于某种原因,该答案对我不起作用.我必须添加setup_postdata行才能使其正常工作.

I view get_the_excerpt() as a function with legacy design. As WordPress usage has grown there are many newer use-cases where it doesn't fit but where the newer functions for getting different data do. One example is the now frequent use of an $args array of function options.

But it's easy to fix for your needs. Here's an alternative function you can use which you can put anywhere in your theme's functions.php file:

function robins_get_the_excerpt($post_id) {
   global $post;  
   $save_post = $post;
   $post = get_post($post_id);
   $output = get_the_excerpt();
   $post = $save_post;
   return $output;
}

Just to add to MikeSchinkel's answer, which for some reason wouldn't work for me. I had to add the setup_postdata line to make it work.

这是一个两层的代码,我经常使用 wp_trim_words .我不断发现自己需要缩写,并且在循环之外阅读了更多功能.其他人可能会发现这很有用.这就是我用来:

     //Get Post Object
    $dapost = get_post(POST_ID);              
    //Get the Execerpt
    $my_excerpt = wp_trim_words( apply_filters( "the_excerpt", get_the_excerpt($dapost) ? get_the_excerpt($dapost) : $dapost->post_content  ), "20", "<a href='$dapost->guid'> ".__('Get More Stuff', 'translation')."</a>" );
 

     $dapost = get_post(POST_ID);    
    apply_filters( "the_excerpt", get_the_excerpt($dapost) ? get_the_excerpt($dapost) : $dapost->post_content
 

     "20"
 

    "<a href='$dapost->guid'> ".__('Get More Stuff', 'translation')."</a>"