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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.5 $ -->
<!-- splitted from ./en/functions/mcrypt.xml, last change in rev 1.7 -->
<refentry id="function.mcrypt-module-self-test">
<refnamediv>
<refname>mcrypt_module_self_test</refname>
<refpurpose>This function runs a self test on the specified module</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>bool</type><methodname>mcrypt_module_self_test</methodname>
<methodparam><type>string</type><parameter>algorithm</parameter></methodparam>
<methodparam choice="opt"><type>string</type><parameter>lib_dir</parameter></methodparam>
</methodsynopsis>
<para>
This function runs the self test on the algorithm specified. The
optional <parameter>lib_dir</parameter> parameter can contain the
location of where the algorithm module is on the system.
</para>
<para>
The function returns &true; if the self test succeeds, or &false; when if
fails.
</para>
<para>
<example>
<title><function>mcrypt_module_self_test</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
var_dump(mcrypt_module_self_test(MCRYPT_RIJNDAEL_128)) . "\n";
var_dump(mcrypt_module_self_test(MCRYPT_BOGUS_CYPHER));
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
bool(true)
bool(false)
]]>
</screen>
</example>
</para>
</refsect1>
</refentry>
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