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<?xml version='1.0' encoding="utf-8"?>
<!-- $Revision: 297078 $ -->
<refentry xml:id="function.spl-object-hash" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>spl_object_hash</refname>
<refpurpose>
Return hash id for given object
</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>string</type><methodname>spl_object_hash</methodname>
<methodparam><type>object</type><parameter>obj</parameter></methodparam>
</methodsynopsis>
<para>
This function returns a unique identifier for the object. This id can be
used as a hash key for storing objects or for identifying an object.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>object</parameter></term>
<listitem>
<para>
Any object.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
A string that is unique for each currently existing object and is always
the same for each object.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>A <function>spl_object_hash</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$id = spl_object_hash($object);
$storage[$id] = $object;
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
<note>
<para>
When an object is destroyed, its hash may be reused for other objects.
</para>
</note>
</refsect1>
</refentry>
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