sql query script

sql.php

@@ -0,0 +1,22 @@
+<?php
+error_reporting(E_ALL);
+$username = $_REQUEST["username"]; 
+$password = $_REQUEST["password"];
+$database = (isset($_REQUEST["database"]) ? $_REQUEST["database"] : null);
+
+$link = mysqli_connect("localhost", $username, $password, $database);
+if (!$link) {
+  die("Error connecting to mysql: " . mysqli_connect_error() . " (" . mysqli_connect_errno() . ")");
+}
+
+$res = mysqli_query($link, $_REQUEST["query"]);
+if (!$res) {
+  die("Error executing query: " . mysqli_error($link));
+}
+
+while ($row = $res->fetch_assoc()) {
+  var_dump($row);
+}
+
+mysqli_close($link);
+?>