How to comment out code in a .tpl.php template

Question

If I want to remove parts of .tpl.php file what are my options other than removing them permanently? HTML comments < !-- --> work but print the part in the HTML source. PHP // comments or /* */ don't work.

For example, how could I comment out a block like:

    <?php if ($logo): ?>
      <a href="<?php print $front_page; ?>" title="<?php print t('Home'); ?>" rel="home" id="logo">
      <img src="<?php print $logo; ?>" alt="<?php print t('Home'); ?>" />
      </a>
    <?php endif; ?>

Answer 1

I actually prefer to use this way

<?php if (FALSE): ?>
<div class="meta">
  <?php if ($submitted): ?>
    <span class="submitted"><?php print $submitted ?></span>
  <?php endif; ?>

  <?php if ($terms): ?>
    <span class="terms"><?php print $terms ?></span>
  <?php endif;?>
</div>
<?php endif; ?>

This make it easier to put the block back in (change FALSE to TRUE), or attach a variable to the conditional.

EDIT:

To address your example, I would do it one of two ways

<?php if (FALSE): ?>
<?php if ($logo): ?>
  <a href="<?php print $front_page; ?>" title="<?php print t('Home'); ?>" rel="home" id="logo">
  <img src="<?php print $logo; ?>" alt="<?php print t('Home'); ?>" />
  </a>
<?php endif; ?>
<?php endif; ?>

or

<?php if (FALSE && $logo): ?>
  <a href="<?php print $front_page; ?>" title="<?php print t('Home'); ?>" rel="home" id="logo">
  <img src="<?php print $logo; ?>" alt="<?php print t('Home'); ?>" />
  </a>
<?php endif; ?>

I would normally lean towards using the second in my daily work.

Answer 2

Use version control, and then you can just delete the lines.

Answer 3

Anything within PHP tags can be commented with // or /* */

Are you missing any opening or closing PHP tags?