有人可以解释这个PHP代码吗？ [关闭]

Question

    <h1 class="site-title">
       <a href="<?php echo esc_url( home_url( '/' ) ); ?>" 
       rel="home"><?php bloginfo( 'name' ); ?>
       </a>
    </h1>
    if (is_category('Ponies')) { ?>
      // overlay a pretty rainbow on the logo for the ponies category
       <img id="rainbow"
          src='<?php bloiginfo('template_directory');?>/img/rainbow.png" 
          alt="OMG! Ponies! " />
    <?php  } ?>

I'm having trouble matching the PHP tags. The comment for the code says "Now any time the category of the content is Ponies, your header also includes the rainbow.png." But it's clear how that is happening. The actual code is on p245 of WordPress Design and Developement by Williams. Thanks for putting another pair of eyes on it.

Answer 1

"If" is not inside <?php ... ?>. Must be:

<?php if (is_category('Ponies')) { ?>