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php

--TEST--
Bug #44899 (__isset usage changes behavior of empty())
--FILE--
<?php

class myclass
{
	private $_data = array();

	function __construct($data)
	{
		$this->_data = $data;
	}

	function __isset($field_name)
	{
		return isset($this->_data[$field_name]);
	}
}

$arr = array('foo' => '');

$myclass = new myclass($arr) ;

echo (isset($myclass->foo)) ? 'isset' : 'not isset';
echo "\n";
echo (empty($myclass->foo)) ? 'empty' : 'not empty';
echo "\n";
echo ($myclass->foo) ? 'not empty' : 'empty';
echo "\n";

?>
--EXPECTF--
isset
empty

Notice: Undefined property: myclass::$foo in %s on line %d
empty