what's wrong with the code? [closed]

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  <?php if (!empty(cutstr($node->content,300))) : ?>
      <div class="pr_teaser">
       <?php echo cutstr($node->content,300); ?>
        </div>
    <?php endif; ?>

what's wrong with the code? the cutstr function is ok. my IDE makes an a alert to this line <?php 开发者_如何学Pythonif (!empty(cutstr($node->content,300))) : ?> is wrong? but i can't find the error.

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empty() only checks variables as anything else will result in a parse error. In other words, the following will not work: empty(trim($name)).

From http://php.net/manual/en/function.empty.php

You need to do something like this:

<?php $value=cutstr($node->content,300); if (!empty($value)) : ?>
  <div class="pr_teaser">
   <?php echo $value; ?>
    </div>
<?php endif; ?>