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134 lines (116 loc) · 3.3 KB
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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: 4b06b2d5c3a28a13504972df0f0be6deffabb4c5 Maintainer: satoruyoshida Status: ready -->
<!-- Credits: mumumu -->
<reference xml:id="class.arrayaccess" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
<title>ArrayAccess インターフェイス</title>
<titleabbrev>ArrayAccess</titleabbrev>
<partintro>
<section xml:id="arrayaccess.intro">
&reftitle.intro;
<para>
配列としてオブジェクトにアクセスするための機能のインターフェイスです。
</para>
</section>
<section xml:id="arrayaccess.synopsis">
&reftitle.interfacesynopsis;
<classsynopsis class="interface">
<oointerface>
<interfacename>ArrayAccess</interfacename>
</oointerface>
<classsynopsisinfo role="comment">&Methods;</classsynopsisinfo>
<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.arrayaccess')/db:refentry/db:refsect1[@role='description']/descendant::db:methodsynopsis[@role='ArrayAccess'])"/>
</classsynopsis>
</section>
<section xml:id="arrayaccess.examples">
&reftitle.examples;
<example xml:id="arrayaccess.example.basic">
<title>基本的な使用法</title>
<programlisting role="php">
<![CDATA[
<?php
class Obj implements ArrayAccess {
public $container = [
"one" => 1,
"two" => 2,
"three" => 3,
];
public function offsetSet($offset, $value): void {
if (is_null($offset)) {
$this->container[] = $value;
} else {
$this->container[$offset] = $value;
}
}
public function offsetExists($offset): bool {
return isset($this->container[$offset]);
}
public function offsetUnset($offset): void {
unset($this->container[$offset]);
}
public function offsetGet($offset): mixed {
return isset($this->container[$offset]) ? $this->container[$offset] : null;
}
}
$obj = new Obj;
var_dump(isset($obj["two"]));
var_dump($obj["two"]);
unset($obj["two"]);
var_dump(isset($obj["two"]));
$obj["two"] = "A value";
var_dump($obj["two"]);
$obj[] = 'Append 1';
$obj[] = 'Append 2';
$obj[] = 'Append 3';
print_r($obj);
]]>
</programlisting>
&example.outputs.similar;
<screen>
<![CDATA[
bool(true)
int(2)
bool(false)
string(7) "A value"
Obj Object
(
[container] => Array
(
[one] => 1
[three] => 3
[two] => A value
[0] => Append 1
[1] => Append 2
[2] => Append 3
)
)
]]>
</screen>
</example>
</section>
</partintro>
&language.predefined.arrayaccess.offsetexists;
&language.predefined.arrayaccess.offsetget;
&language.predefined.arrayaccess.offsetset;
&language.predefined.arrayaccess.offsetunset;
</reference>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->