View file vendor/filp/whoops/src/Whoops/Resources/views/frame_code.html.php

<?php /* Display a code block for all frames in the stack.
       * @todo: This should PROBABLY be done on-demand, lest
       * we get 200 frames to process. */ ?>
<div class="frame-code-container <?php echo (!$has_frames ? 'empty' : '') ?>">
  <?php foreach ($frames as $i => $frame): ?>
    <?php $line = $frame->getLine(); ?>
      <div class="frame-code <?php echo ($i == 0 ) ? 'active' : '' ?>" id="frame-code-<?php echo $i ?>">
        <div class="frame-file">
          <?php $filePath = $frame->getFile(); ?>
          <?php if ($filePath && $editorHref = $handler->getEditorHref($filePath, (int) $line)): ?>
            <a href="<?php echo $editorHref ?>" class="editor-link"<?php echo ($handler->getEditorAjax($filePath, (int) $line) ? ' data-ajax' : '') ?>>
              Open:
              <strong><?php echo $tpl->breakOnDelimiter('/', $tpl->escape($filePath ?: '<#unknown>')) ?></strong>
            </a>
          <?php else: ?>
            <strong><?php echo $tpl->breakOnDelimiter('/', $tpl->escape($filePath ?: '<#unknown>')) ?></strong>
          <?php endif ?>
        </div>
        <?php
          // Do nothing if there's no line to work off
          if ($line !== null):

          // the $line is 1-indexed, we nab -1 where needed to account for this
          $range = $frame->getFileLines($line - 20, 40);

          // getFileLines can return null if there is no source code
          if ($range):
            $range = array_map(function ($line) { return empty($line) ? ' ' : $line;}, $range);
            $start = key($range) + 1;
            $code  = join("\n", $range);
        ?>
            <pre id="frame-code-linenums-<?=$i?>" class="code-block linenums:<?php echo $start ?>"><?php echo $tpl->escape($code) ?></pre>

          <?php endif ?>
        <?php endif ?>

        <?php $frameArgs = $tpl->dumpArgs($frame); ?>
        <?php if ($frameArgs): ?>
          <div class="frame-file">
              Arguments
          </div>
          <div id="frame-code-args-<?=$i?>" class="code-block frame-args">
              <?php echo $frameArgs; ?>
          </div>
        <?php endif ?>

        <?php
          // Append comments for this frame
          $comments = $frame->getComments();
        ?>
        <div class="frame-comments <?php echo empty($comments) ? 'empty' : '' ?>">
          <?php foreach ($comments as $commentNo => $comment): ?>
            <?php extract($comment) ?>
            <div class="frame-comment" id="comment-<?php echo $i . '-' . $commentNo ?>">
              <span class="frame-comment-context"><?php echo $tpl->escape($context) ?></span>
              <?php echo $tpl->escapeButPreserveUris($comment) ?>
            </div>
          <?php endforeach ?>
        </div>

      </div>
  <?php endforeach ?>
</div>