php-doc-en/reference/spl/splobjectstorage/removeallexcept.xml

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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="splobjectstorage.removeallexcept" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>SplObjectStorage::removeAllExcept</refname>
<refpurpose>Removes all objects except for those contained in another storage from the current storage</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<modifier>public</modifier> <type>int</type><methodname>SplObjectStorage::removeAllExcept</methodname>
<methodparam><type>SplObjectStorage</type><parameter>storage</parameter></methodparam>
</methodsynopsis>
<para>
Removes all objects except for those contained in another storage from the current storage.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>storage</parameter></term>
<listitem>
<para>
The storage containing the elements to retain in the current storage.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the number of removed objects.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>SplObjectStorage::removeAllExcept</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$a = (object) 'a';
$b = (object) 'b';
$c = (object) 'c';
$foo = new SplObjectStorage;
$foo->attach($a);
$foo->attach($b);
$bar = new SplObjectStorage;
$bar->attach($b);
$bar->attach($c);
$foo->removeAllExcept($bar);
var_dump($foo->contains($a));
var_dump($foo->contains($b));
?>
]]>
</programlisting>
&example.outputs.similar;
<screen>
<![CDATA[
bool(false)
bool(true)
]]>
</screen>
</example>
</para>
</refsect1>
</refentry>
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