= 3){ $query = mysql_query("SELECT `id` FROM `users` WHERE `username`='".$_POST['username']."' LIMIT 1"); if(mysql_num_rows($query)){ $error['userexists'] = 'Username exists'; } } else { $error['usernameinput'] = 'Please enter a username'; } $_POST['email'] = trim($_POST['email']); if($_POST['email']){ if(!eregi("^[a-zA-Z0-9]+[a-zA-Z0-9_.-]*@[a-zA-Z0-9]+[a-zA-Z0-9_.-])*\.[a-z]{2,4}$", $_POST['email'])){ $error['emailerror'] = 'Email Incorrect'; } else { $query = mysql_query("SELECT `id` FROM `users` WHERE `email`='".$_POST['email']."' LIMIT 1"); if(mysql_num_rows($query)){ $error['emailexists'] = 'Email exists'; } } } else { $error['emailinput'] = 'Please supply an email address'; } if($_POST['password1'] && $_POST['password2']){ if($_POST['password1'] != $_POST['password2']){ $error['passmismatch'] = 'Passwords don\'t match'; } } else { $error['passwordinput'] = 'Please enter your password in both fields'; } } if(!$error && $_POST['submit']){ } else { ?>