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<h2 class="title">New features</h2>
<p class="simpara">
PHP 5.4.0 offers a wide range of new features:
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Support for <a href="language.oop5.traits.html" class="link">traits</a> has been added.
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Short array syntax has been added, e.g. <em>$a = [1, 2, 3, 4];</em> or
<em>$a = ['one' => 1, 'two' => 2, 'three' => 3, 'four' => 4];</em>.
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Function array dereferencing has been added, e.g. <em>foo()[0]</em>.
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<a href="functions.anonymous.html" class="link">Closures</a> now support <em>$this</em>.
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<em><?=</em> is now always available, regardless of the
<a href="ini.core.html#ini.short-open-tag" class="link">short_open_tag</a> <var class="filename">php.ini</var> option.
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Class member access on instantiation has been added,
e.g. <em>(new Foo)->bar()</em>.
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<span class="simpara">
<em>Class::{expr}()</em> syntax is now supported.
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Binary number format has been added, e.g. <em>0b001001101</em>.
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Improved parse error messages and improved incompatible arguments warnings.
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The session extension can now track the <a href="session.upload-progress.html" class="link">upload progress</a> of files.
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<span class="simpara">
Built-in development <a href="features.commandline.webserver.html" class="link">web server in CLI mode</a>.
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