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example source code
visitorauthorization.php

Building a game — open source code This is the actual source code from a new web game. See the game at thissideofsanity.com and read how this was built starting at example code.

This is example code from the SlamZee project and This Side of Sanity, released under Apache License 2.0.

Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

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example source code
visitorauthorization.php

This is example code from the SlamZee project and This Side of Sanity, released under Apache License 2.0.

Visitor authorization functions.

visitor authorization functions
first pass

<?php

/* FILE NAME /visitorauthorization.php */

require_once('./php/databasefunctions.php');

/******************************/
/* NonceCharacter                                        */
/* generate a nonce character                        */
/******************************/
function NonceCharacter()
{

$randomnumber = rand(1,36);

if ( $randomnumber == 1 )
  return '1'; /* the number */
elseif ( $randomnumber == 2 )
  return '2';
elseif ( $randomnumber == 3 )
  return '3';
elseif ( $randomnumber == 4 )
  return '4';
elseif ( $randomnumber == 5 )
  return '5';
elseif ( $randomnumber == 6 )
  return '6';
elseif ( $randomnumber == 7 )
  return '7';
elseif ( $randomnumber == 8 )
  return '8';
elseif ( $randomnumber == 9 )
  return '9';
elseif ( $randomnumber == 10 )
  return '0'; /* the number */
elseif ( $randomnumber == 11 )
  return 'A';
elseif ( $randomnumber == 12 )
  return 'B';
elseif ( $randomnumber == 13 )
  return 'C';
elseif ( $randomnumber == 14 )
  return 'D';
elseif ( $randomnumber == 15 )
  return 'E';
elseif ( $randomnumber == 16 )
  return 'F';
elseif ( $randomnumber == 17 )
  return 'G';
elseif ( $randomnumber == 18 )
  return 'H';
elseif ( $randomnumber == 19 )
  return 'I'; /* the letter */
elseif ( $randomnumber == 20 )
  return 'J';
elseif ( $randomnumber == 21 )
  return 'K';
elseif ( $randomnumber == 22 )
  return 'L';
elseif ( $randomnumber == 23 )
  return 'M';
elseif ( $randomnumber == 24 )
  return 'N';
elseif ( $randomnumber == 25 )
  return 'O'; /* the letter */
elseif ( $randomnumber == 26 )
  return 'P';
elseif ( $randomnumber == 27 )
  return 'Q';
elseif ( $randomnumber == 28 )
  return 'R';
elseif ( $randomnumber == 29 )
  return 'S';
elseif ( $randomnumber == 30 )
  return 'T';
elseif ( $randomnumber == 31 )
  return 'U';
elseif ( $randomnumber == 32 )
  return 'V';
elseif ( $randomnumber == 33 )
  return 'W';
elseif ( $randomnumber == 34 )
  return 'X';
elseif ( $randomnumber == 35 )
  return 'Y';
else /* default case */
  return 'Z';

} /* END NonceCharacter */

/******************************/
/* NonceGenerator                                        */
/* generate a number used once                     */
/******************************/
function NonceGenerator()
{

$noncestring = NonceCharacter().NonceCharacter().NonceCharacter().NonceCharacter().NonceCharacter().NonceCharacter().NonceCharacter().NonceCharacter().NonceCharacter().NonceCharacter().NonceCharacter().NonceCharacter().NonceCharacter().NonceCharacter().NonceCharacter().NonceCharacter();

return $noncestring;

} /* END NonceGenerator */

/******************************/
/* SetAdminFlag                                            */
/******************************/
function SetAdminFlag( $currentuser )
{

global $adminflag;

/* VALIDATE ADMIN */
if (($currentuser == 'Milo') OR ($currentuser == 'michaelm'))
  $adminflag = true;
else
  $adminflag = false;

} /* END SetAdminFlag*/

/******************************/
/* RegisterNewVisitor                                   */
/* called from newregistration.php ProcessRegistrationForm */
/******************************/
function RegisterNewVisitor($accountname, $passwd, $firstname, $lastname,$gender,$birthdate,$email)
// register new person with db
// return true or error message
{

 // connect to db
  $conn = ConnectCelebDataBase(0); /* located in databasefunctions.php */
  if (!$conn)
    {
      echo 'Could not connect to database server - please try later.';
      return false;
    }

  // check if username is unique 
  $testname = strtolower($accountname);

 // actually don't need any info other than existence in data base, so just get the account name
  $result = mysql_query("select accountname from accounts where lower(accountname) ='$testname'"); 
  if (!$result)
    {
        echo '<br>Could not execute query';
        /*return false;*/
    }

  if (mysql_num_rows($result)>0) 
    {
       echo 'That screen name is taken - Choose another one.';
       require_once('./php/newregistration.php');
       DisplayRegistrationForm(); /* located in newregistration.php */
       return false;
    }

  // check if email is unique 
  $testemail = strtolower($email);

 // actually don't need any info other than existence in data base, so just get the email
  $result = mysql_query("select email from accounts where lower(email) ='$testemail'"); 
  if (!$result)
    {
        echo '<br>Could not execute query';
        /*return false;*/
    }

  if (mysql_num_rows($result)>0) 
    {
       echo 'That email is taken - Choose another one.';
       require_once('./php/newregistration.php');
       DisplayRegistrationForm(); /* located in newregistration.php */
       return false;
    }

   if ($firstname == "")
      $firstname = "NULL";
   if ($lastname == "")
      $lastname = "NULL";

$datearray = getdate();

$year = $datearray['year'];
$month = $datearray['mon'];
$monthday = $datearray['mday'];

if ($month < 10)
  $firstpart = $year."-0".$month;
else
  $firstpart = $year."-".$month;

if ($monthday < 10)
  $secondpart = "-0".$monthday;
else
  $secondpart = "-".$monthday;

$todaydate = $firstpart.$secondpart;

$currentdatetime = date('Y-m-d H:i:s', time());

  // if ok, put in db
  $query = "insert into accounts values 
                         (NULL, '$accountname', '$email', password('$passwd'), '$firstname', '$lastname', '$gender', '$birthdate', '$todaydate', '$currentdatetime')";
  $result = mysql_query($query);

  if (!$result)
    {
      echo 'Could not register you in visitor database - please try again later.';
      /*echo "<br>SQL query is ".$query; /* TESTING */
      /*echo "<br>SQL error is ".mysql_error().' SQL error number '.mysql_errno(); /* TESTING */
      return false;
    }

  return true;

} /* END RegisterNewVisitor */
 


/******************************/
/* LoginVisitor                                             */
/* this routine is misnamed                           */
/* actually checks that the email and            */
/* passsword MATCH for an account             */
/* called by login.php                                    */
/* called from newregistration.php                */
/* called from ChangePassword in visitorauthorization.php */
/******************************/
function LoginVisitor($email, $password)
// check username and password with db
// if yes, return true
// else return false
{
  // attempt to connect to db
  $conn = ConnectCelebDataBase(0); /* located in databasefunctions.php */
  if (!$conn)
    return -1;

  // check if username is unique
  $result = mysql_query("select * from accounts 
                         where email ='$email'
                         and password = password('$password')");

  if (!$result)
     return -2;
  
  if (mysql_num_rows($result)>0)
     return 0;
  else 
     return -3;

} /* END LoginVisitor */

/******************************/
/* ChangePasswordDataBase                         */
/* called from changepassword.php                */
/******************************/
function ChangePasswordDataBase($username, $oldpassword, $newpassword)
// change password for username/oldpassword to newpassword
// return true or false
{
  // if the old password is right 
  // change their password to newpassword and return true
  // else return false
  $result = LoginVisitor($email, $oldpassword); /* located in visitorauthorization.php - actually checks to see that the account name and password are a valid match*/
  if ($result == 0)
  {
    $result = mysql_query( "update accounts
                            set password = password('$newpassword')
                            where email = '$email'");

    if (!$result)
      return false;  // not changed
    else
      return true;  // changed successfully

  }
  else
    {
      echo "<p style=\"color:#ff0000\">old password was wrong</p>";
      return false; // old password was wrong
    }
} /* END ChangePasswordDataBase */

?>

return to explanation of source code

tokens/credits/money
second pass

Add integer fields to the data base for money, credits, and tokens, with each defaulting to one.

Modify function RegisterNewVisitor:

  $query = "insert into accounts values 
                         (NULL, '$accountname', '$email', password('$passwd'), '$firstname',
'$lastname', '$gender', '$birthdate', '$todaydate', '$currentdatetime', 'P',0,0,1, NULL)";

return to explanation of source code

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