Question

I was given an excel file with about 450 username and passwords (the passwords are encoded with MD5 hash)
How can I put this excel (.xls) file into my MySQL database and on the website (php side) how can I check if the user entered password is the correct password (I know nothing about hashing a password with MD5 or any hash-sequence for that matter)

Answer 1

1.- You can export an excel file as a CSV file.
2.- Use phpmyadmin to import to your site a CSV file.
3.- Checking passwords:

if (md5($_POST['user_password']) == $db['user_password'])
{
    echo 'welcome back bro!'
}