Source of: /manual/en/datetime.installation.php
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<div id="datetime.installation" class="section">
<h2 class="title">Installation</h2>
<p class="para">There is no installation needed to use these
functions; they are part of the PHP core.</p>
<blockquote><p><b class="note">Note</b>:
<b>Getting the latest timezone database</b><br />
The latest version of the timezone database can be installed via PECL's
<a href="http://pecl.php.net/get/timezonedb" class="link external">» timezonedb</a>.
<br />
</p></blockquote>
<blockquote><p><b class="note">Note</b>:
<b>Experimental DateTime support in PHP 5.1.x</b><br />
Although the <a href="class.datetime.php" class="classname">DateTime</a> class (and related functions)
are enabled by default since PHP 5.2.0, it is possible to add experimental
support into PHP 5.1.x by using the following flag before configure/compile:
<i>CFLAGS=-DEXPERIMENTAL_DATE_SUPPORT=1</i>
<br />
</p></blockquote>
</div><?php manual_footer(); ?>
