<?php
function registerform()
{
   error_reporting(E_ALL);
	ini_set('display_errors','on');

	echo "<h1>Registration Form:</h1>\n\n";   // Form name <h1>
	echo "<form name='registration' action='"; $php_self; echo "' method='post'>\n";    // Builds the html form
	echo "<table class='formtable'>";    // Starts the beggining of the table

	if($_SERVER['REQUEST_METHOD'] == 'GET') {
	username("off");
	password("off");
	}
	elseif($_SERVER['REQUEST_METHOD'] == 'POST') {
	username("on");
	password("on");
	}

	echo "<tr>\n<td>\n</td>\n";
	echo "<td><input type='submit' value='Register'>   <input type='reset' value='Reset'></td>\n</tr>\n</table></form>";
	// Creates submit button and reset button, and also closes the form and table tabs

}

function username($status) {
	echo "<tr>\n";
	echo "<td>Username:</p></td>\n";
	echo "<td><input type='text' name='username' value=''>";
	if($status == "on") { checkform("usercheck"); } else {}
	echo "</td>\n</tr>\n";
}

function password($status2) {
	echo "<tr>\n";
   echo "<td>Password:</p></td>\n";
   echo "<td><input type='password' name='password1'></td>\n";
  	echo "</tr>\n";
  	echo "<tr>\n";
   echo "<td>Re-Type Password:</p></td>\n";
   echo "<td><input type='password' name='password2'>";
   if($status2 == "on") { checkform("passcheck"); } else {}
   echo "</td>\n</tr>\n";
}

function checkform($checktype){

	switch($checktype)
	{
		case "usercheck" :
			$username = $_POST['username'];
			if(!(isset($username) && (strlen($username) > 2) && (strlen($username) < 20) && (ctype_alpha($username)))) {
				$errors['username'] = '<br>Username needs to be over 2 letters long and can only contain the letters A-Z';
				echo $errors['username'];
			}
		break;

		case "passcheck" :

			$pass1 = $_POST['password1'];    // Get password1 submitted from form
			$pass2 = $_POST['password2'];	 // Get password2 submitted from form

			if($pass1 == $pass2)
			{
				if(!(isset($pass1) && (strlen($pass1) > 2) && (strlen($pass1) < 20) && (ctype_alpha($pass1))))
				 {
					$errors['password'] = '<br>Password needs to be over 2 letters long and can only contain the letters A-Z';
					 //echo $errors['password'];
				 }
				 else {
					$errors['password'] = '<br>Passwords Match!';
				   }
			}
			else
			{
				$errors['password'] = '<br>Passwords Did not Match!';
				//echo $errors['password'];
			}

			echo $errors['password'];

		break;

	}
}

?>