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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 326284 $ -->
<refentry xml:id="mongoid.isvalid" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>MongoId::isValid</refname>
<refpurpose>Check if a value is a valid ObjectId</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<modifier>public</modifier> <modifier>static</modifier> <type>bool</type><methodname>MongoId::isValid</methodname>
<methodparam><type>mixed</type><parameter>value</parameter></methodparam>
</methodsynopsis>
<para>
This method may be used to check a variable before passing it as an argument
to <function>MongoId::__construct</function>.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term>
<parameter>value</parameter>
</term>
<listitem>
<para>
The value to check for validity.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns &true; if <parameter>value</parameter> is a
<classname>MongoId</classname> instance or a string consisting of exactly 24
hexadecimal characters; otherwise, &false; is returned.
</para>
</refsect1>
</refentry>
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