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1fb0ef23d7
* Object iteration / Iterator: Replace duplicated examples with direct links to the appropriate sections and add cross-links. Closes GH-517.
105 lines
2.3 KiB
XML
105 lines
2.3 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<sect1 xml:id="language.oop5.iterations" xmlns="http://docbook.org/ns/docbook">
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<title>Object Iteration</title>
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<para>
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PHP provides a way for objects to be defined so it is possible to iterate
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through a list of items, with, for example a &foreach; statement. By default,
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all <link linkend="language.oop5.visibility">visible</link> properties will be used
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for the iteration.
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</para>
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<example>
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<title>Simple Object Iteration</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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class MyClass
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{
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public $var1 = 'value 1';
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public $var2 = 'value 2';
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public $var3 = 'value 3';
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protected $protected = 'protected var';
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private $private = 'private var';
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function iterateVisible() {
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echo "MyClass::iterateVisible:\n";
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foreach ($this as $key => $value) {
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print "$key => $value\n";
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}
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}
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}
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$class = new MyClass();
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foreach($class as $key => $value) {
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print "$key => $value\n";
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}
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echo "\n";
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$class->iterateVisible();
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?>
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]]>
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</programlisting>
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&example.outputs;
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<screen role="php">
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<![CDATA[
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var1 => value 1
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var2 => value 2
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var3 => value 3
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MyClass::iterateVisible:
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var1 => value 1
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var2 => value 2
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var3 => value 3
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protected => protected var
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private => private var
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]]>
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</screen>
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</example>
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<para>
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As the output shows, the &foreach; iterated through all of the
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<link linkend="language.oop5.visibility">visible</link> properties that could be
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accessed.
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</para>
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<simplesect role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><link linkend="language.generators">Generators</link></member>
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<member><interfacename>Iterator</interfacename></member>
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<member><interfacename>IteratorAggregate</interfacename> </member>
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<member><link linkend="spl.iterators">SPL Iterators</link></member>
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</simplelist>
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</para>
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</simplesect>
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</sect1>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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