gistfile1.php

<?php
namespace enum;
function Create($sName,$aValues, $sNamespace = __NAMESPACE__)
{
	if(preg_match("#[a-zA-Z_\\x7f-\\xff][a-zA-Z0-9_\\x7f-\\xff]*#si",$sName) === 0)
		throw new InvalidName;
	if(class_exists('\enum\\'.$sName))
		throw new NameExists;
	$sValues = 'array(';
	foreach($aValues as $sValue)
	{
		$sValues .= '\''.sha1($sName.'_'.time().'_'.$sValue).'\' =>  \''.$sValue.'\', ';
	}
	$sValues = substr($sValues, 0, -2);
	$sValues .= ')';

	$_class = '
namespace '.$sNamespace.';
class '.$sName.'
{
	private static $_aValues = '.$sValues.';
	private $_sCurrentValue = null;
	public function __construct($sName)
	{
		if(in_array($sName,self::$_aValues))
		{
			foreach(self::$_aValues as $sKey => $sValue)
				if($sValue == $sName)
					$this->_sCurrentValue = $sKey;
		}
		else
			throw new TypeDoesNotMatch();
	}

	public function __toString()
	{
		return self::$_aValues[$this->_sCurrentValue];
	}
}';
	eval($_class);
}

class TypeDoesNotMatch extends \Exception {};
class InvalidName extends \Exception {};
class NameExists extends \Exception {};

// przyklady:
\enum\Create ('method',array('get','post'), __NAMESPACE__);
\enum\Create ('input_type', array('button', 'checkbox', 'file', 'hidden', 'image', 'password', 'radio', 'reset', 'submit', 'text'), __NAMESPACE__);

use \Form\method;
use \Form\input_type;

$oMethod = new method('GET');
$oInput = new input_type('button');
?>

gistfile2.txt