inserting records in PHP after Connection

<?php
$username = "root";
$password = "";
$hostname = "localhost";
$studentname=$_GET["stname"];
$studentimage=$_GET["stimage"];
$studentquestion=$_GET["stquestion"];
$studentanswer=$_GET["stanswer"];

//connection to the database
$dbhandle = mysql_connect($hostname, $username, $password)
  or die("Unable to connect to MySQL");
//echo "Connected to MySQL now you can create Table new one  <br>";
//select database
mysql_select_db("student_db",$dbhandle);
//echo "data Base Selected";
//command to be run by the DBMS  Mysql or ACESS
$query = "insert into student(student_name,student_image,student_question,answer_question) values('$studentname','$studentimage','$studentquestion','$studentanswer')  ";
// run the query and store the results in the $result variable.
mysql_query($query,$dbhandle) or die("cannot do the query");
?>