storage question involving simplexml_load_string

[lli2k5]

I'm accessing a url command to retrieve xml data through simplexml_load_string.

I would like to know where is the xml data actually stored on the server if this command is executed and if I leave it as so below, would the data get flushed once I executie another simplexml_load_string command.

$xml= file_get_contents($url);
$simple_xml=simplexml_load_string($xml);

[Weedpacket]

It's stored in memory, like the contents of any variable. It's cleared when the script ends or you set those varibles to something else.