mirror of
https://github.com/sigmasternchen/php-doc-en
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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@163367 c90b9560-bf6c-de11-be94-00142212c4b1
111 lines
3 KiB
XML
111 lines
3 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.3 $ -->
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<sect1 id="language.oop5.visibility">
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<title>Visibility</title>
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<para>
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The visibility of a property or method can be defined by prefixing the
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declaration with the keywords: public, protected or private. Public
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declared items can be acessed everywhere. Protected limits access to
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inherited classes (and to the class that defines the item). Private limits
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visiblity only to the class that defines the item.
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</para>
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<sect2 id="language.oop5.visiblity-members">
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<title>Members Visibility</title>
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<para>
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Class members must be defined with public, private, or protected.
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</para>
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<example>
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<title>Member declaration</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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public $public = "MyClass::public!\n";
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protected $protected = "MyClass::Protected!\n";
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protected $protected2 = "MyClass::Protected2!\n";
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private $private = "MyClass::private!\n";
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function printHello() {
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print "MyClass::printHello() " . $this->private;
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print "MyClass::printHello() " . $this->protected;
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print "MyClass::printHello() " . $this->protected2;
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}
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}
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class MyClass2 extends MyClass {
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protected $protected = "MyClass2::protected!\n";
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function printHello() {
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MyClass::printHello();
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print "MyClass2::printHello() " . $this->public;
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print "MyClass2::printHello() " . $this->protected;
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print "MyClass2::printHello() " . $this->protected2;
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/* Will result in a Fatal Error: */
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//print "MyClass2::printHello() " . $this->private; /* Fatal Error */
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}
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}
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$obj = new MyClass();
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print "Main:: " . $obj->public;
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//print $obj->private; /* Fatal Error */
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//print $obj->protected; /* Fatal Error */
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//print $obj->protected2; /* Fatal Error */
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$obj->printHello(); /* Should print */
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$obj2 = new MyClass2();
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print "Main:: " . $obj2->private; /* Undefined */
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//print $obj2->protected; /* Fatal Error */
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//print $obj2->protected2; /* Fatal Error */
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$obj2->printHello();
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?>
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]]>
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</programlisting>
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</example>
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<note>
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<simpara>
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The use PHP 4 use of declaring a variable with the keyword 'var' is
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no longer valid for PHP 5 objects. For compatiblity a variable declared
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in php will be assumed with public visiblity, and a
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<constant>E_STRICT</constant> warning will be issued.
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</simpara>
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</note>
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</sect2>
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<sect2 id="language.oop5.visiblity-methods">
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<title>Method Visibility</title>
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<para>
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.
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</para>
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</sect2>
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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:"../../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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