I am facing problems in the register page

Question

<?php
require('includes/core.inc.php');
require('includes/database/connect.db.php');
session_start();

if(isset($_POST['Register'])) {

    $username=$_POST['Username'];
    $password=$_POST['Password'];
    $query= "INSERT into users (Username,Password) VALUES ('$username','$password')";
    $res = mysql_query($query);
    if($res){
        header("Location:index.php");
    }     
}
?>

I am facing problems while inserting data in the database don't know why the query is correct this problem is while selecting from database

Notice: Undefined index: Username in C:\xamp\htdocs\chatbox\index.php on line 4

<?php
require('includes/core.inc.php');
session_start();
echo "Welcome".$_SESSION['Username'];
if(isset($_POST['send'])){
    if(send_msg($_POST['sender'],$_POST['message'])){
        //echo "Message sent ...";
    }else{
        //echo "failed to sent ";
    }
}   
?>

http://bobby-tables.com - If you code this way you'll face problem of SQL injection. Your application can be hacked in a few seconds without any know-how. Visit the link to learn more about injection and how to prevend them (SQL-statements). Never, really NEVER(!!!) put user-inputs directly in your SQL query. — Twinfriends, Mar 10 '17 at 11:00
and also start session in all the pages..this is must for using session variable — Mudassar Saiyed, Mar 10 '17 at 11:02
You are using `$_SESSION`. But where you are assigning the value for `$_SESSION['Username']`? — Sriram G, Mar 10 '17 at 11:06

score 1 · Answer 1 · answered Mar 10 '17 at 11:19

try this remember you have to set session variable before using it.

<?php
require('includes/core.inc.php');
require('includes/database/connect.db.php');
session_start();

if(isset($_POST['Register'])) {

    $username=$_POST['Username'];
    $password=$_POST['Password'];

$_SESSION['Username'] = $username;

    $query= "INSERT into users (Username,Password) VALUES ('$username','$password')";
    $res = mysql_query($query);
    if($res){
        header("Location:index.php");
    }     
}
?>

also to get rid of undefine index issue you should always use

echo "Welcome".isset($_SESSION['Username'])?$_SESSION['Username']:"";

hope your issue will get resolved.

Notice: Undefined index: Username in C:\xamp\htdocs\chatbox\index.php on line 4 — Abdul wahid, Mar 11 '17 at 11:35

I am facing problems in the register page

1 Answers1