Prettier duplicates a comment and inserts it somewhere else

首先，根据提供的 Playground 链接复现该问题，并将 formatter 输出与输入进行比较，尤其关注 else 和 endif 附近的 PHP 注释。跟踪 plugin-php 的注释处理路径；当周围的 PHP 块存在或被移除时，注释都不会重复或移动，即表示完成。

@prettier/plugin-php v0.25.0
Playground link

Input:

<?php if (have_posts()): ?>

  <p>Content if have posts</p>

  <?php
  /* My comment */
  ?>

  <?php
  // Comment in else
  // Another comment
  // Comment number three
  else: ?>

  <?php if (true): ?>

    <p>This is always true</p>

  <?php endif;
  // end true check
  ?>

<?php endif;
// end have_posts() check
?>

Output:

<?php if (have_posts()): ?>

  <p>Content if have posts</p>

  <?php
  /* My comment */
  ?>

  <?php
  // Comment in else
  // Another comment
  // Comment number three
  // end true check

  else: ?>

  <?php if (true): ?>

    <p>This is always true</p>

  <?php endif;
  // end true check
  ?>

<?php endif;
// end have_posts() check
?>

Notice that the //end true check comment is inserted next to the comments near the else statement.

However, a weirder things happen when I delete the entire /* My comment */ PHP block:

@prettier/plugin-php v0.25.0
Playground link

Input:

<?php if (have_posts()): ?>

  <p>Content if have posts</p>

  <?php
  // Comment in else
  // Another comment
  // Comment number three
  else: ?>

  <?php if (true): ?>

    <p>This is always true</p>

  <?php endif;
  // end true check
  ?>

<?php endif;
// end have_posts() check
?>

Output:

<?php if (have_posts()): ?>

  <p>Content if have posts</p>

  <?php
  // Comment in else
  // Another comment
  // Comment number three
  // end true check
  // Comment in else
  // Another comment
  // Comment number three
  // end true check
  else: ?>

  <?php if (true): ?>

    <p>This is always true</p>

  <?php endif;
  // end true check
  ?>

<?php endif;
// end have_posts() check
?>

Multiple comments get duplicated