problem in using in array function

[programAngel]

Hi,

I am building a drop down menu of cities from an xml file.
Because the xml file contain duplication I used the function in array to make sure I don't echo twice the same value.

This is the code:

<?php
$DiurPlus=file_get_contents('http://www.diur-plus.co.il/xml.aspx');
	$xmlDiurPlus=simplexml_load_string($DiurPlus);
	$imagelist=$xmlDiurPlus;
	echo "<select>";
	$cities=array();
	foreach ($xmlDiurPlus->propertyList as $propertylist){
		if (!in_array($propertylist->city,$cities)){
			echo '<option value="'.$propertylist->city.'">'.$propertylist->city.'</option>';			
			$cities[]=$propertylist->city;
			}
		}
	echo "</select> ";
?>

Yet when I run it, I still get the same value more than once.

Where is my mistake?