PHP MySQL - Access denied for user - php

Question

I know that there are a tons of related threads but none of them fixes my problem. i'm having a problem connecting to my database. I get the following error:
Access denied for user ''#'localhost' (using password: NO)
My code for register.php is the following:
<?php
require 'config.php';
if(isset($_POST['submit'])){
//does verification
$mail1 = $_POST['email1'];
$mail2 = $_POST['email2'];
$pass1 = $_POST['pass1'];
$pass2 = $_POST['pass2'];
if(($mail1 == $mail2) && ($pass1 == $pass2)){
//everything is k
$name = mysql_escape_string($_POST['name']);
$lname = mysql_escape_string($_POST['lname']);
$uname = mysql_escape_string($_POST['uname']);
$email1 = mysql_escape_string($_POST['email1']);
$pass1 = mysql_escape_string($_POST['pass1']);
$pass1 = md5($pass1);
//Checks if username is taken
$check = mysql_query("SELECT * FROM users WHERE uname = '$uname'")or die(mysql_error());
if (mysql_num_rows($check)>=1) {
echo "Username already taken";
} else {
mysql_query("INSERT INTO `users` (`first_name`, `last_name`, `username`, `mail`, `password`, `id`) VALUES ('$name', '$lname', '$uname', '$email1', '$pass1', NULL)") or die(mysql_error());
echo "Registration Successful";
} }
else {
echo "sorry, something doesn't match.";
}
} else {
//displays form
echo $form = <<<EOT
<form action="register.php" method="POST">
First Name: <input type="text" name="name" /><br />
Last Name: <input type="text" name="lname" /><br />
Username: <input type="text" name="uname" /><br />
Email: <input type="text" name="email1" /><br />
Confirm Email: <input type="text" name="email2" /><br />
Password: <input type="password" name="pass1" /><br />
Confirm Password: <input type="password" name="pass2" /><br />
<input type="submit" value="Register" name="submit" />
EOT;
}
?>
and my config.php is:
<?php
mysql_connect("localhost", "root", "");
mysql_select_db("MyDB");
?>
What to do? My PHP version is 5.6.27 and MySQL version is 5.6.33

Answer 1

Aside from the fact that you should be using mysqli functions instead of mysql for security reasons, have you checked:
Your MySQL username is correct?
That a password is not required?
The database you are connecting to is correct?
The do:
$db = mysql_connect("localhost", "root", "");
mysql_select_db("MyDB", $db);
And your queries should be:
$query = mysql_query("SELECT * FROM users WHERE uname = '$uname'", $db);

Answer 2

First of all, you'd better use mysqli or pdo (https://stackoverflow.com/a/12860046/2660794)
Once you have modified your code, you need to use the credentials you use to connect to database on your server (eg : the one you use for phpmyadmin).

Answer 3

I'd recommend using mysqli. For your case, the config.php would look like:
<?php
$mysqli = new mysqli("localhost", "root", "", "MyDB");
if(mysqli_connect_errno()){
printf("Connection Failed %s\n", mysqli_connect_error());
exit();
}
session_start();
if(isset($SESSION["REMOTE_ADDR"]) && $SESSION["REMOTE_ADDR"] != $SERVER["REMOTE_ADDR"]){
session_destroy();
session_start();
}
?>
and instead of "require", you'd do:
include ("config.php");
Hope this helped