如果您可以在PHP端处理这个问题，那么您可能可以h2 使用内容中的标记regular expression.

PHP VERSION

测试内容

$content = "<h2>This is H2 Content</h2><p>This is p content</p>Random Content<h2>This is another H2 section</h2><b><h2>This the third H2 section</h2></b>";

抓取H2s中的任何文本

preg_match_all(\'#<h2>(.*?)</h2>#\', $content, $matches);

// Merge the first 2 matches

$potential_title = implode ( \' - \', array_slice($matches[0], 0, 2));

如果我们有什么。。。

if( ! empty ( $potential_title ) ) {

从剩余内容中删除任何HTML

    $cleaner_title = strip_tags( $potential_title );

准备帖子标题更新

    $my_post_updates = array(
        \'ID\'           => $post_id,
        \'post_title\'   => $cleaner_title, 
    );

    // Update the post into the database

    wp_update_post( $my_post_updates );
}

JS VERSION

Javascript版本与此类似，您只需截取表单提交，获取内容，解析结果，然后传递数据。

这只是提醒解析测试内容的结果

// test content    
var content = "<h2>This is H2 Content</h2><p>This is PPP content</p>Random Content<h2>This is another H2 section</h2><b><h2>This the third H2 section</h2></b>";

// variables to store regEx results. 
var match, regex = /<h2>(.*?)<\\/h2>/ig, matches = [];

// get all the matches and put in array
while (match = regex.exec(content)) { matches.push( match[1] ); }

// if we have any...
if( matches.length ) {

   // pull the first 2 and join them together
   var title = matches.slice ( 0, 2 ).join ( \' - \' );

   // send this along with your form submission
   alert(title);
}