Laravel Access denied for user 'root'@'localhost' (using password: YES) in laravel 4.2

Question

I have old project which built using Laravel 4.2.I am getting following error

PDOException (1045) SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (using password: YES)

I have googled and tried every think but i couldn't able to fix it

.env file

APP_KEY=az9tq5VHQCV9g5m2CsgY89jtijrCMgEA
DB_HOST=localhost
DB_DATABASE=billing
DB_USERNAME=root
DB_PASSWORD=1234

database.php

'mysql' => array(
            'driver'    => 'mysql',
            'host'      => 'localhost',
            'database'  => 'billing',
            'username'  => 'root',
            'password'  => '1234',
            'charset'   => 'utf8',
            'collation' => 'utf8_unicode_ci',
            'prefix'    => '',
        ),

Can any one guide me where m doing wrong ?

Note: Before asking question i tried by updating composer update as well as most of the stackoverflow answers.

Updated

I have tested this connection by creating php file

<?php
$servername = "localhost";
$username = "root";
$password = "1234";

// Create connection
$conn = new mysqli($servername, $username, $password);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 
echo "Connected successfully";
?>

i will get Connected successfully message

Answer 1

My error was Laravel Access denied for user 'root'@'localhost' (using password: NO)

and I only got this error at my host site.

In .env I changed:

DB_USERNAME=user
DB_PASSWORD=password

to:

DB_USERNAME='user'
DB_PASSWORD='password' 

Worked for me!