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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 332133 $ -->
<sect1 xml:id="language.oop5.changelog" xmlns="http://docbook.org/ns/docbook">
<title>OOP Changelog</title>
<para>
Changes to the PHP 5 OOP model are logged here. Descriptions and other notes regarding
these features are documented within the OOP 5 documentation.
</para>
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>5.4.0</entry>
<entry>
Added: <link linkend="language.oop5.traits">traits</link>.
</entry>
</row>
<row>
<entry>5.4.0</entry>
<entry>
Changed: If an <link linkend="language.oop5.abstract">abstract</link> class
defines a signature for the constructor it will now be enforced.
</entry>
</row>
<row>
<entry>5.3.3</entry>
<entry>
Changed: Methods with the same name as the last element of
a <link linkend="language.namespaces">namespaced</link>
class name will no longer be treated as <link
linkend="language.oop5.decon">constructor</link>. This change doesn't
affect non-namespaced classes.
</entry>
</row>
<row>
<entry>5.3.0</entry>
<entry>
Changed: Classes that implement interfaces with methods that have default
values in the prototype are no longer required to match the interface's default
value.
</entry>
</row>
<row>
<entry>5.3.0</entry>
<entry>
Changed: It's now possible to reference the class using a variable (e.g.,
<literal>echo $classname::constant;</literal>).
The variable's value can not be a keyword (e.g., <literal>self</literal>,
<literal>parent</literal> or <literal>static</literal>).
</entry>
</row>
<row>
<entry>5.3.0</entry>
<entry>
Changed: An <constant>E_WARNING</constant> level error is issued if
the magic <link linkend="language.oop5.overloading">overloading</link>
methods are declared <link linkend="language.oop5.static">static</link>.
It also enforces the public visibility requirement.
</entry>
</row>
<row>
<entry>5.3.0</entry>
<entry>
Changed: Prior to 5.3.0, exceptions thrown in the
<function>__autoload</function> function could not be
caught in the <link linkend="language.exceptions">catch</link> block, and
would result in a fatal error. Exceptions now thrown in the __autoload function
can be caught in the <link linkend="language.exceptions">catch</link> block, with
one provison. If throwing a custom exception, then the custom exception class must
be available. The __autoload function may be used recursively to autoload the
custom exception class.
</entry>
</row>
<row>
<entry>5.3.0</entry>
<entry>
Added: The <link linkend="language.oop5.overloading">__callStatic</link> method.
</entry>
</row>
<row>
<entry>5.3.0</entry>
<entry>
Added: <link linkend="language.types.string.syntax.heredoc">heredoc</link>
and <link linkend="language.types.string.syntax.heredoc">nowdoc</link>
support for class <emphasis>const</emphasis> and property definitions.
Note: heredoc values must follow the same rules as double-quoted strings,
(e.g., no variables within).
</entry>
</row>
<row>
<entry>5.3.0</entry>
<entry>
Added: <link linkend="language.oop5.late-static-bindings">Late Static Bindings</link>.
</entry>
</row>
<row>
<entry>5.3.0</entry>
<entry>
Added: The <link linkend="object.invoke">__invoke()</link> method.
</entry>
</row>
<row>
<entry>5.2.0</entry>
<entry>
Changed: The <link linkend="object.tostring">__toString()</link>
method was only called when it was directly combined with
<function>echo</function> or <function>print</function>.
But now, it is called in any string context (e.g. in
<function>printf</function> with <literal>%s</literal> modifier) but not
in other types contexts (e.g. with <literal>%d</literal> modifier).
Since PHP 5.2.0, converting objects without a <literal>__toString</literal>
method to string emits a <constant>E_RECOVERABLE_ERROR</constant> level error.
</entry>
</row>
<row>
<entry>5.1.3</entry>
<entry>
Changed: In previous versions of PHP 5, the use of <literal>var</literal>
was considered deprecated and would issue an <constant>E_STRICT</constant>
level error. It's no longer deprecated, therefore does not emit the error.
</entry>
</row>
<row>
<entry>5.1.0</entry>
<entry>
Changed: The <link linkend="object.set-state">__set_state()</link> static
method is now called for classes exported by <function>var_export</function>.
</entry>
</row>
<row>
<entry>5.1.0</entry>
<entry>
Added: The <link linkend="object.isset">__isset()</link>
and <link linkend="object.unset">__unset()</link> methods.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</sect1>
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