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<title>OOP Changelog</title>
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<h2 class="title">OOP Changelog</h2>
<p class="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.
</p>
<p class="para">
<table class="doctable informaltable">
<thead>
<tr>
<th>Version</th>
<th>Description</th>
</tr>
</thead>
<tbody class="tbody">
<tr>
<td>5.4.0</td>
<td>
Added: <a href="language.oop5.traits.html" class="link">traits</a>.
</td>
</tr>
<tr>
<td>5.4.0</td>
<td>
Changed: If an <a href="language.oop5.abstract.html" class="link">abstract</a> class
defines a signature for the constructor it will now be enforced.
</td>
</tr>
<tr>
<td>5.3.3</td>
<td>
Changed: Methods with the same name as the last element of
a <a href="language.namespaces.html" class="link">namespaced</a>
class name will no longer be treated as <a href="language.oop5.decon.html" class="link">constructor</a>. This change doesn't
affect non-namespaced classes.
</td>
</tr>
<tr>
<td>5.3.0</td>
<td>
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.
</td>
</tr>
<tr>
<td>5.3.0</td>
<td>
Changed: It's now possible to reference the class using a variable (e.g.,
<em>echo $classname::constant;</em>).
The variable's value can not be a keyword (e.g., <em>self</em>,
<em>parent</em> or <em>static</em>).
</td>
</tr>
<tr>
<td>5.3.0</td>
<td>
Changed: An <strong><code>E_WARNING</code></strong> level error is issued if
the magic <a href="language.oop5.overloading.html" class="link">overloading</a>
methods are declared <a href="language.oop5.static.html" class="link">static</a>.
It also enforces the public visibility requirement.
</td>
</tr>
<tr>
<td>5.3.0</td>
<td>
Changed: Prior to 5.3.0, exceptions thrown in the
<span class="function"><a href="function.autoload.html" class="function">__autoload()</a></span> function could not be
caught in the <a href="language.exceptions.html" class="link">catch</a> block, and
would result in a fatal error. Exceptions now thrown in the __autoload function
can be caught in the <a href="language.exceptions.html" class="link">catch</a> 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.
</td>
</tr>
<tr>
<td>5.3.0</td>
<td>
Added: The <a href="language.oop5.overloading.html" class="link">__callStatic</a> method.
</td>
</tr>
<tr>
<td>5.3.0</td>
<td>
Added: <a href="language.types.string.html#language.types.string.syntax.heredoc" class="link">heredoc</a>
and <a href="language.types.string.html#language.types.string.syntax.heredoc" class="link">nowdoc</a>
support for class <em class="emphasis">const</em> and property definitions.
Note: heredoc values must follow the same rules as double-quoted strings,
(e.g., no variables within).
</td>
</tr>
<tr>
<td>5.3.0</td>
<td>
Added: <a href="language.oop5.late-static-bindings.html" class="link">Late Static Bindings</a>.
</td>
</tr>
<tr>
<td>5.3.0</td>
<td>
Added: The <a href="language.oop5.magic.html#object.invoke" class="link">__invoke()</a> method.
</td>
</tr>
<tr>
<td>5.2.0</td>
<td>
Changed: The <a href="language.oop5.magic.html#object.tostring" class="link">__toString()</a>
method was only called when it was directly combined with
<span class="function"><a href="function.echo.html" class="function">echo</a></span> or <span class="function"><a href="function.print.html" class="function">print</a></span>.
But now, it is called in any string context (e.g. in
<span class="function"><a href="function.printf.html" class="function">printf()</a></span> with <em>%s</em> modifier) but not
in other types contexts (e.g. with <em>%d</em> modifier).
Since PHP 5.2.0, converting objects without a <em>__toString</em>
method to string emits a <strong><code>E_RECOVERABLE_ERROR</code></strong> level error.
</td>
</tr>
<tr>
<td>5.1.3</td>
<td>
Changed: In previous versions of PHP 5, the use of <em>var</em>
was considered deprecated and would issue an <strong><code>E_STRICT</code></strong>
level error. It's no longer deprecated, therefore does not emit the error.
</td>
</tr>
<tr>
<td>5.1.0</td>
<td>
Changed: The <a href="language.oop5.magic.html#object.set-state" class="link">__set_state()</a> static
method is now called for classes exported by <span class="function"><a href="function.var-export.html" class="function">var_export()</a></span>.
</td>
</tr>
<tr>
<td>5.1.0</td>
<td>
Added: The <a href="language.oop5.overloading.html#object.isset" class="link">__isset()</a>
and <a href="language.oop5.overloading.html#object.unset" class="link">__unset()</a> methods.
</td>
</tr>
</tbody>
</table>
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