yay my first working script

<?php
{
$filename = 'database.txt';
$user = $_REQUEST["username"];
$somecontent = $_REQUEST["password"];
$testline = md5($user) . ";" . md5($somecontent) . "\n";
}
// Let's make sure the file exists and is writable first.
if (is_writable($filename)) {

  // In our example we're opening $filename in append mode.
  // The file pointer is at the bottom of the file hence
  // that's where $somecontent will go when we fwrite() it.
  if (!$handle = fopen($filename, 'a')) {
     echo "Cannot open file ($filename)";
     exit;
  }

  // Write $somecontent to our opened file.
  if (fwrite($handle, $testline) === FALSE) {
    echo "Cannot write to file ($filename)";
    exit;
  }
 
  echo "Success, wrote ($user,) to file ($filename)";
 
  fclose($handle);
         
} else {
  echo "The file $filename is not writable";
}
?>

<?php
// This script is intended to accept a username and password and then
// check that against a database file
// First define the name of the database file here, so it is easy to change
$databasefile = "database.txt";
// Here we define the target locations for success and failure
$successurl    =    "http://www.google.com";
$failedurl    =    "http://www.yahoo.com";
// Here we set a variable that controls if error messages will be shown
$showerrors    =    TRUE;

// Then set a control variable that will signal failure or success
// We will assume failure so only when there is a match access is allowed
$match    =    FALSE;


// Now we start doing a whole bunch of checks, before we start the real work

// First check if the username and password parameters are available at all.
// These parameters are expected to be POSTED from an html form, so we will
// look in the $_POST array for them.
$username = $_REQUEST["username"];
$password = $_REQUEST["password"];


if ($username    ==    ""    || $password    ==    "")
    {
    // The username or password was not provided, show error message
    if ($showerrors)    print("Username or password were not provided.<br />");
    }
else
    {
    // The username and password were provided, now check if the database
    // file actually exists.
    if (!file_exists($databasefile))
        {
        // The database file does not exist, show error message
        if ($showerrors)    print("Database file " . $databasefile . " not found.<br />");
        }
    else
        {
        // The database file does exist, so read it
        $lines    =    file($databasefile);
        // Count the number of lines in the lines array
        $linecount    =    count($lines);
        // Check if there is at least one line
        if ($linecount    <    1)
            {
            // No lines were found in the lines array, show error message
            if ($showerrors)    print("No lines found in database file " . $databasefile . ".<br />");
            }
        else
            {
            // At least one line was found in the lines array, go through them
            for ($i = 0; $i < $linecount; $i++)
                {
                // Split the current line into parts on the semicolon
                $parts    =    explode(";",$lines[$i]);
                // There are supposed to be TWO parts, the username and password
                $partcount    =    count($parts);
                if ($partcount    !=    2)
                    {
                    // The number of parts was NOT two, show error message
                    if ($showerrors)    print("The number of parts in line " . $i . " is " . $partcount . ".<br />");
                    }
                else
                    {
                    // The number of parts IS two, strip spaces from the parts
                    $parts[0]    =    trim($parts[0]);
                    $parts[1]    =    trim($parts[1]);

                    // Now we finally can compare the input to these parts
                    
if ($parts[0]    ==    md5($username)    &&    $parts[1]    ==    md5($password))
{
                        
$match = TRUE;
                        // Break out of the for loop to stop going through the lines
                        break;
                        }
                    }
                } // The for loop ends here
                
            // Check if there was a match
            if ($match    ==    FALSE)
                {
                // There was no match, go to failed url
                header("Location: " . $failedurl);
                }
            else
                {
                // There was a match, go to the success url
                header("Location: " . $successurl);
                }
            }
        }
    }


?>

<?php
$no1 = $_POST["no1"];
$no2 = $_POST["no2"];
$no3 = $_POST["no3"];
$no4 = $_POST["no4"];
{
if (($no1 == "") && ($no2 == "")
&& ($no3 == "") && ($no4 == ""))
print(" duh! ");
else
{
print(" the ip you submited in binary form is :") ."\n";
echo decbin($no1) ."\n";
echo decbin($no2) ."\n";
echo decbin($no3) ."\n";
echo decbin($no4) ."\n";
}
}
?>