<?php get_extended( $post_content ) ?>

$post_content

(string) (必填) 文章内容

默认值: None

示例：

显示最新帖子的小摘录。
如果你想在你的WordPress博客上显示最新的文章，但是只显示<！--更多-->标记，您可以使用：

<ul>
<?php
global $post;
$args = array( 'numberposts' => 5 );
$myposts = get_posts( $args );
foreach( $myposts as $post ) : setup_postdata( $post );  
    $content_arr = get_extended (get_the_content() ); ?>
    <li>
       <a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
       </br>
       <?php echo $content_arr['main']; //Display the part before the more tag  ?>   
    </li>
<?php endforeach; ?>
</ul>

源文件：

/**
 * Get extended entry info ().
 *
 * There should not be any space after the second dash and before the word
 * 'more'. There can be text or space(s) after the word 'more', but won't be
 * referenced.
 *
 * The returned array has 'main', 'extended', and 'more_text' keys. Main has the text before
 * the ``. The 'extended' key has the content after the
 * `` comment. The 'more_text' key has the custom "Read More" text.
 *
 * @since 1.0.0
 *
 * @param string $post Post content.
 * @return array Post before ('main'), after ('extended'), and custom readmore ('more_text').
 */
function get_extended( $post ) {
	//Match the new style more links.
	if ( preg_match('//', $post, $matches) ) {
		list($main, $extended) = explode($matches[0], $post, 2);
		$more_text = $matches[1];
	} else {
		$main = $post;
		$extended = '';
		$more_text = '';
	}

	//  leading and trailing whitespace.
	$main = preg_replace('/^[s]*(.*)[s]*$/', '\1', $main);
	$extended = preg_replace('/^[s]*(.*)[s]*$/', '\1', $extended);
	$more_text = preg_replace('/^[s]*(.*)[s]*$/', '\1', $more_text);

	return array( 'main' => $main, 'extended' => $extended, 'more_text' => $more_text );
}