identify Joomla3 to make extension for both 2.5 and 3.0? - Joomla! Forum - community, help and support

to make extensions both joomla 2.5 , joomla 3.0 i'm looking unique identifier.

something this

code: select all

if(!defined('ds')){
   //joomla 3
   define('ds',directory_separator);
}else{
       //joomla 2.5
}


but not work if extension, example system-plugin, has defined ds (like seems common fix these days).

is there adviced unique identifier joomla 3?

code: select all

$version = new jversion;
if($version->release >= "3.0")
{
    //joomla 3.0
}
else
{
    //joomla 2.5
}