<?php

function OpenCon()
{
    $dbhost = 'localhost';
    $dbuser = 'root';
    $dbpass = '0000';
    $db = 'mydatabase';

$conn = new mysqli($dbhost, $dbuser, $dbpass, $db) or die ("Connect failed: %sn". $conn -> error);

return $conn;
}

function CloseCon($conn)
{
    $conn -> close();
}

?>

<?php

include 'connection.php';

$conn = OpenCon();

echo "Connected Successfully";

CloseCon($conn);

?>

<form id='register-form' action="database/reg.php" method='post'>
            <input type="text" maxlength="15" name="usr" placeholder="Username" required>
            <input type="text" name="fname" placeholder="First Name" required>
            <input type="text" name="lname" placeholder="Last Name" required>
            <input type="email" name="mail" placeholder="Email" required>
            <input type="password" name="psw" placeholder="Password" required>
            <input type="password" placeholder="Re Password" required>
            <button type='submit'> Εγγραφή</button>