+<dd><dl class="field-list simple">
+<dt class="field-odd">Parameters</dt>
+<dd class="field-odd"><ul class="simple">
+<li><p><strong>ptr</strong> -- pointer to an initialized <a class="reference internal" href="memcached_create.html#_CPPv412memcached_st" title="memcached_st"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_st</span></code></a> struct</p></li>
+<li><p><strong>group_key</strong> -- key namespace</p></li>
+<li><p><strong>group_key_length</strong> -- length of the key namespace without any terminating zero</p></li>
+<li><p><strong>key</strong> -- the key</p></li>
+<li><p><strong>key_length</strong> -- length of the key without any terminating zero</p></li>
+<li><p><strong>value</strong> -- the value to append/prepend</p></li>
+<li><p><strong>value_length</strong> -- the length of the value without any terminating zero</p></li>
+<li><p><strong>expiration</strong> -- expiration as a unix timestamp or as relative expiration time in seconds</p></li>
+<li><p><strong>flags</strong> -- 16 bit flags</p></li>
+</ul>
+</dd>
+<dt class="field-even">Returns</dt>
+<dd class="field-even"><p><a class="reference internal" href="memcached_return_t.html#_CPPv418memcached_return_t" title="memcached_return_t"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_return_t</span></code></a> indicating success</p>
+</dd>
+</dl>
+</dd></dl>