Wht happen in this code

Question

$_RESULT

Answer 1

send your full code.

Answer 2

there have separte file callled home.php and
alluser.php
this alluser.php(i think u can get a idea from this code)
session_start();
if(!isset($_SESSION['USERNAME'])){
header('location:login.php');
}
$searchname=$_REQEST['searchtext'];
explane me wht happen in REQEST for get simple idea about that