<?php
$db = mysqli_connect('localhost','root','');
mysqli_select_db($db,'website');
mysqli_set_charset($db,'utf8');
$search = $_REQUEST['name'];
$pass = $_REQUEST['pass'];
$query = "UPDATE 'users' SET 'password' = '$pass' WHERE 'name' = '$search'";
$rez = mysqli_query($db, $query);
If($rez){
    echo "Ok";
}
else
    echo "error";
?>