Hello World 12.5.

<?php

/*
 *
HTML DIO
<html>
<title>Testna stranica s formom</title>
<body>
    <form action="test.php" method="post">
    <table>
    <tr><td>Login Name:</td><td><input type="text" name="username"></td></tr>
    <tr><td>Password: </td><td><input type="password" name="password"></td></tr>
    <tr><td>First Name: </td><td><input type="text" name="firstName"></td></tr>
    <tr><td>Last Name: </td><td><input type="text" name="lastName"></td></tr>
    <tr><td>E-mail: </td><td><input type="email" name="email"></td></tr>
    <tr><td><input type="submit"></td></tr>
    </table>
    </form>
</body>
</html>
 */


function passwordValidate($pw){

}

function howLong($arg, $argName, $len) {
    if (empty($arg)){
        echo("You have not entered your " . $argName);
        exit();
    }
    if (strlen($arg)<$len){
        echo($argName . " " . $arg . " not long enough. <br>
                        Make it longer than " . $len . " symbols.");
        exit();
    }
}

function validate($args) {
    foreach($args as $key => $element) {
        switch ($key) {
            case "username":
                howLong($element, $key, 4);
                break;
            case "password":
                howLong($element, $key, 6);
                break;
            case "firstName":
            case "lastName":
                howLong($element, $key, 1);
                break;
            case "email":
                howLong($element, $key, 5);
                break;
        }
    }
}


validate($_REQUEST);
echo "Sve je u redu";

?>