kennyt Fri Mar 5 16:24:41 2004 EDT
Modified files:
/phpdoc/en/language operators.xml
Log:
Added 'instanceof' as a 'type operator.'
http://cvs.php.net/diff.php/phpdoc/en/language/operators.xml?r1=1.61&r2=1.62&ty=u
Index: phpdoc/en/language/operators.xml
diff -u phpdoc/en/language/operators.xml:1.61 phpdoc/en/language/operators.xml:1.62
--- phpdoc/en/language/operators.xml:1.61 Sat Jan 31 06:45:33 2004
+++ phpdoc/en/language/operators.xml Fri Mar 5 16:24:40 2004
@@ -1,5 +1,5 @@
<?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.61 $ -->
+<!-- $Revision: 1.62 $ -->
<chapter id="language.operators">
<title>Operators</title>
<simpara>
@@ -875,6 +875,41 @@
<link linkend="ref.array">Array functions</link>.
</para>
</sect1>
+ <sect1 id="language.operators.type">
+ <title>Type Operators</title>
+ <para>
+ PHP has a single type operator: <literal>instanceof</literal>.
+ <literal>instanceof</literal> is used to determine whether a given
+ object is of a specified <link linkend="language.oop">object class</link>.
+ </para>
+ <simpara>
+ <literal>instanceof</literal> was introduced in PHP version 5.
+ </simpara>
+ <informalexample>
+ <programlisting>
+<![CDATA[
+<?php
+class A { }
+class B { }
+
+$thing = new A;
+
+if ($thing instanceof A) {
+ echo 'A';
+}
+if ($thing instanceof B) {
+ echo 'B';
+}
+?>
+]]>
+ </programlisting>
+ <simpara>
+ As <literal>$thing</literal> is an object of type A, but not B, only the block
+ dependent on the A type will be executed:
+ </simpara>
+ <screen>A</screen>
+ </informalexample>
+ </sect1>
</chapter>
<!-- Keep this comment at the end of the file
