<?php
include_once $_SERVER['DOCUMENT_ROOT'] . '/include/shared-manual.inc';
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include_once dirname(__FILE__) ."/toc/book.exif.inc";
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contributors($setup);

?>
<div id="exif.constants" class="appendix">
 <h1 class="title">预定义常量</h1>

 <p class="simpara">下列常量由此扩展定义，且仅在此扩展编译入 PHP 或在运行时动态载入时可用。</p>
 <dl>
  
   <dt id="constant.exif-use-mbstring">
    <strong><code><a href="exif.constants.php#constant.exif-use-mbstring">EXIF_USE_MBSTRING</a></code></strong>
    (<span class="type"><a href="language.types.integer.php" class="type int">int</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     如果启用了 <a href="ref.mbstring.php" class="link">mbstring</a>，这个常量的值为 <code class="literal">1</code>，
     否则为 <code class="literal">0</code>。
    </span>
   </dd>
  
 </dl>
 <p class="simpara">
  <span class="function"><a href="function.exif-imagetype.php" class="function">exif_imagetype()</a></span> 列出几个相关的内建变量。
 </p>
</div>
<?php manual_footer($setup); ?>