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    <p>I don't know Java super well, but you can do most of that - just have to do it differently, unless I misunderstand your question.</p> <p>Data members on PHP classes can't have runtime-calculated values, such as new object instances. So, this would not work</p> <pre><code>class ReportField { public static $foo = new ReportField() } </code></pre> <p><em>Note: <code>final</code> properties are not allowed except on methods</em></p> <p>It's actually really curious to me that you're making one class responsible for two things - an object blueprint AND static storage for instances of itself as well.</p> <p>Anyway, here's what I <em>think</em> your code would look like in PHP</p> <pre><code>&lt;?php class ReportField { public static $store = array(); private $key, $label, $accessLevel, $sql; private function __construct( $key, $label, $accessLevel, $sql ) { $this-&gt;key = $key; $this-&gt;label = $label; $this-&gt;accessLevel = $accessLevel; $this-&gt;sql = $sql; } public static function initializeStore() { if ( empty( self::$store ) ) { self::$store['foo'] = new self( 'foo', 'Foo', 1, 'foo as my_foo' ); // repeat } } public static function getByKey( $key ) { if ( empty( self::$store ) ) { self::initializeStore(); } if ( isset( self::$store[$key] ) ) { return self::$store[$key]; } throw new Exception( __CLASS__ . " instance identified by key $key not found" ); } public function getFieldSql() { return $this-&gt;sql; } } // Usage $selectFields = array(); foreach ( $reportPrefs as $pref ) { $selectFields[] = ReportField::getByKey( $pref-&gt;getField() )-&gt;getFieldSql(); } </code></pre>
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    1. COAfter reading the earlier answers, this is the approach that seemed logical to me. A static method for access that initializes the collection lazily seems to be the most logical approach. As for why I'd take this approach, it's a nice way to create a set of options with multiple properties that is immutable except by the programmer. Normally you'd just use a database table for this sort of thing, but because of the way it's tied into the app, making it part of the code rather than part of the data makes more sense. (Even though it's data.)
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