Access denied for user 'root'@'localhost' (using password: YES) using MAMP server

Question

I have a HTML form and I'm using PHP to send the results to an sql database on phpMyAdmin but after submitting I get "Access denied for user 'root'@'localhost' (using password: YES)" error.

This is all hosted locally using MAMP, root@localhost is the only user and I'm sure I've got the right password.

I've looked through similar questions, flushed privileges, created new users, tried logging on through the command line (to which I get the same error) but nothing seems to work.

Here's my code:

$hostname = "localhost";
$username = "root";
$password = "root";
$dbname = "quotetool";

$conn = new mysqli($hostname, $username, $password, $dbname);

if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "INSERT INTO customerdetails (workstations, servers, firewalls, name, email, phone, support)
VALUES ('$workstations', '$servers', '$firewalls', '$name', '$email', '$phone', '$support')";

if ($conn->query($sql) === TRUE) {
    echo "New record created";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error; 
}
$conn->close();

and here is my user if this helps

Screenshot of my error

Answer 1

Try this code possibly it is because MySql expects Mamp to use port 3306.

$hostname = "localhost";
$username = "root";
$password = "root";
$dbname = "quotetool";
$port = "8889";

$conn = new mysqli($hostname, $username, $password, $dbname, $port);

if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "INSERT INTO customerdetails (workstations, servers, firewalls, name, email, phone, support)
VALUES ('$workstations', '$servers', '$firewalls', '$name', '$email', '$phone', '$support')";

if ($conn->query($sql) === TRUE) {
    echo "New record created";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error; 
}
$conn->close();

Correct syntax

mysqli_connect(host,username,password,dbname,port,socket);

If any issue let me know I will try fixing it.