here is the code:
Code: Select all
<?php
if($_POST["Xon"]){
//the user submitted the form start validation
$F_username = strtolower($_POST["username"]);
$F_username = ltrim($F_username);
$F_username = rtrim($F_username);
$F_password = strtolower($_POST["password"]);
$F_password = ltrim($F_password);
$F_password = rtrim($F_password);
$errors = array();
if(!$F_username){
$errors[] = "You have not completed the <b>username</b> field";
}
else{
if(!ereg("^[a-zA-Z0-9_-]+$", $F_username)){
$errors[] = "You have entered invalid characters into the <b>username</b> field";
}
}
if(!$F_password){
$errors[] = "You have not completed the <b>password</b> field";
}
else{
if(!ereg("^[a-zA-Z0-9_-]+$", $F_password)){
$errors[] = "You have entered invalid characters into the <b>password</b> field";
}
}
//if there were errors show the form and pass the errors back to the function
if(count($errors) > 0){
showtheform($errors);
}
else{
//validation OK enter data into db now
echo "data entered into DB<p>values after formatting are:<p>username: ".$F_username."<p>password: ".$F_password;
}
}
else{
//the user either did not submit the form or the script was called directly
showtheform();
}
?>
<?
function showtheform($errors){
?>
<html>
<head>
<title>Registraion - register.php</title>
</head>
<body>
<?
if(count($errors) > 0){
echo "Please correct the following mistakes:<ul>";
$x = count($errors);
for($i=0;$i<$x;$i++){
echo "<li>".$errors[$i];
}
echo "</ul>";
}
?>
<form method="post" action="register.php">
<TABLE>
<TR>
<TD><b>Username: </b></TD>
<TD><input type="text" size="20" name="username"></TD>
</TR>
<TR>
<TD><b>Password: </b></TD>
<TD><input type="password" size="20" name="password"></TD>
</TR>
<TR>
<TD colspan="2"><input type="submit" name="Xon"></TD>
</TR>
</TABLE>
</form>
</body>
</html>
<?
}
?>