<?xml version="1.0" encoding="utf-8"?>
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<refentry xml:id="function.mysqlnd-qc-clear-cache" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <refnamediv>
  <refname>mysqlnd_qc_clear_cache</refname>
  <refpurpose>Flush all cache contents</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type>
   <methodname>mysqlnd_qc_clear_cache</methodname>
   <void />
  </methodsynopsis>
  <para>
   Flush all cache contents.
  </para>
  <para>
   Flushing the cache is a storage handler responsibility.
   All built-in storage handler but the
   <literal>memcache</literal> storage
   handler support flushing the cache. The
   <literal>memcache</literal>
   storage handler cannot flush its cache contents.
  </para>
  <para>
   User-defined storage handler may or may not support the operation.
  </para>

 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  &no.function.parameters;
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.success;
  </para>
  <para>
   A return value of
   &false;
   indicates that flushing all cache contents has
   failed or the operation is not supported by
   the active storage handler. Applications must
   not expect that calling the function will always
   flush the cache.
  </para>
 </refsect1>


</refentry>

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