$url="/a/pcg/FPS/";
$urlArr = explode('/',$url,);
$count = count($urlArr);
$last = $count - 1;
$last2 = $count -2 ;
你要的pcg = $urlArr[$last];
你要的FPS = $urlArr[$last2];
$url = "/a/pcg/FPS/";
if(strpos($url,"//") !== false){
$arr_temp = explode("//",$url);
var_dump(array_pop(explode("/",$arr_temp[0])));
}
$arr_temp1 = (explode("/",$url));
$position = count($arr_temp1)-2;
var_dump($arr_temp1[$position]);