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    <p>What are your coding standards?</p> <p>It’s common to start class names with a capital letter (for example: <code>class MyClass</code>). If you do this, then it follows that you would name the file <code>MyClass.php</code>. And <code>MyClass.class.php</code> works too.</p> <p><code>MyClass.class</code> is a bad idea that could allow someone to view your source code if they request that file by name. Using the <code>.php</code> extension ensures that the the user will only see the output after the file is processed by the PHP interpreter which—for a file that contains nothing but a class—is a blank page.</p> <p>Finally, look into <a href="http://us.php.net/manual/en/language.oop5.autoload.php" rel="noreferrer"><code>autoload()</code></a>, which saves you the trouble of calling <code>require_once</code> in order to load your class.</p> <hr> <p><strong>Update:</strong> With PHP coding standard <a href="http://www.php-fig.org/psr/psr-4/" rel="noreferrer">PSR-4</a>, there is now a semi-official way to name your class files. The previous advice—to name your class file the same as the class with the <code>.php</code> extension—still stands. But now you are expected to place that class file in a subdirectory named after your class namespace; PSR-4 requires that all of your classes be contained in a namespace defined by you.</p> <p>What do you get for this? Autoloading for free! If you’re using <a href="http://getcomposer.org/" rel="noreferrer">Composer</a>, you can <a href="https://getcomposer.org/doc/01-basic-usage.md#autoloading" rel="noreferrer">specify the top-level directory for your classes</a> and Composer will autoload them. No more <code>require</code> statements to load your classes.</p> <p>If you don’t want to do this, you don’t have to: PSR-4 is a <em>recommendation</em>, not a requirement.</p>
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    1. POWhat should I name my PHP class file?
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    1. CONate, i've heard of the autoload...is that stable? the php.net basically calls it a last ditch effort?
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    2. COPlus one for the security issue being raised with MyClass.class
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    3. COI haven’t had problems with `__autoload`. The doc describes it as last chance, not last ditch. I don’t think that’s a bad thing.
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