example source code
gameserver.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.

Copyright 2013 Milo (for software), Distribution and website handled by Strazbick.com

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

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

This narrative uses anchor links so that you can follow the building of this software in chronological order. Go to software explanation to start reading. Go to thissideofsanity.com to see the working software.

example source code
gameserver.php

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

debug version
first pass

This version simply echoes out that it exists for debugging purposes.

<?php
echo '<p align="center">the game goes here</p>';
?>

return to explanation of source code

game dispatcher
second pass

Start the code for the game server dispatcher.

<?php
/* FILE: /gameserver.php */
// include function files for this application
 require_once('./php/accounts.php');
 require_once('./php/databasefunctions.php');
 require_once('./php/gamefunctions.php');
/******************************/
/* GLOBALS */
/******************************/
/******************************/
/* FUNCTIONS */
/******************************/
/******************************/
/* StartGame */
/* start the designated game */
/******************************/
function StartGame($startcode,$reporteduser)
{
 echo '<p align="center">Starting a '.$startcode.' game for player '.$reporteduser.'</p>';
 $playernumber = GetAccountNumberFromEmail($reporteduser);
 DisplayVilliansRound($playernumber); /* located in gamefunctions.php */
} /* StartGame */
/******************************/
/* Main Page */
/* serve various game functions */
/******************************/
SessionManagement(); /* located in accounts.php */
$reporteduser = CheckValidUser(); /* located in accounts.php */
/* INITIALIZATIONS */
if(empty($_GET))
 { /*go away if no valid requests */
 return;
 }
else
 { /*collect input from user */
 $startcode = $_GET['start']; /* have a request to start a specific game */
 } /* END if on GET */
/* dispatch based on what game activity requested */
if ( $startcode != '' )
 StartGame($startcode,$reporteduser);
?>

return to explanation of source code

accept game input
third pass

Accept game input.

The new function:

/******************************/
/* NewRound */
/* accept input for new round */
/******************************/
function NewRound($gamechoice,$reporteduser)
{
 echo '<p align="center">New round with input '.$gamechoice.' for player '.$reporteduser.'</p>';
} /* NewRound */

And the change to the dispatcher:

 $startcode = $_GET['start']; /* have a request to start a specific game */
 $roundchoice = $_GET['choice']; /* have an input for a specific game */
/* dispatch based on what game activity requested */
if ( $startcode != '' )
 StartGame($startcode,$reporteduser);
elseif ( $roundchoice != '' )
 NewRound($roundchoice,$reporteduser);

return to explanation of source code

show new round
fourth pass

/******************************/
/* NewRound */
/* accept input for new round */
/******************************/
function NewRound($gamechoice,$reporteduser)
{
 $playernumber = GetAccountNumberFromEmail($reporteduser);
 echo '<p align="center">New round with input '.$gamechoice.' for player '.$reporteduser.'</p>';
 DisplayVilliansRound($playernumber); /* located in gamefunctions.php */
} /* NewRound */

return to explanation of source code

change to StartGame
fifth pass

Change to StartGame.

/******************************/
/* StartGame */
/* start the designated game */
/******************************/
function StartGame($startcode,$reporteduser)
{
 echo '<p align="center">Starting a '.$startcode.' game for player '.$reporteduser.'</p>';
 $playernumber = GetAccountNumberFromEmail($reporteduser);
 $gamenumber = CreateVillainsGame($playernumber); /* located in gamefunctions.php */
 DisplayVilliansRound($playernumber,$gamenumber); /* located in gamefunctions.php */
} /* StartGame */

return to explanation of source code

call to update round
sixth pass

Start building the round scoring function.

 UpdateRoundResults($gamechoice,$playernumber,$gamenumber); /* located in gamefunctions.php */

return to explanation of source code

end game check
seventh pass

Now add the check for the end of game.

 if ( $newround == 11 )
 DisplayEndGame($playernumber,$gamenumber); /* located in gamefunctions.php */
 else
 DisplayVillainsRound($playernumber,$gamenumber); /* located in gamefunctions.php */

return to explanation of source code

create first round
eighth pass

Add code to create the first round.

/******************************/
/* StartGame */
/* start the designated game */
/******************************/
function StartGame($startcode,$reporteduser)
{
 $playernumber = GetAccountNumberFromEmail($reporteduser);
 $gamenumber = CreateVillainsGame($playernumber); /* located in gamefunctions.php */
 IncrementVillainsRound($gamenumber); /* located in gamefunctions.php */
 DisplayVillainsRound($playernumber,$gamenumber); /* located in gamefunctions.php */
} /* StartGame */

return to explanation of source code

check for timed out cookie
ninth pass

Add a little bit of code to check to see if the cookie timed out. If so, ask them to log back in rather than let them see a game with lots of SQL errors.

/******************************/
/* Main Page */
/* serve various game functions */
/******************************/
SessionManagement(); /* located in accounts.php */
$reporteduser = CheckValidUser(); /* located in accounts.php */
if ( $reporteduser == '' )
 {
 echo '<h1 align="center">You must be logged in to play.</h1>';
 echo '<h3 align="center">Your previous cookie timed out.</h3>';
 DisplayLoginForm();
 }

return to explanation of source code

process trivia answer
tenth pass

Process the trivia answer.

Collect input from user.

 $triviachoice = $_GET['trivia']; /* have a trivia input for a specific game */

Dispatch to the handler.

elseif ( $triviachoice != '' )
 ProcessTrivia($triviachoice,$reporteduser,$gamenumber);

Function to handle the trivia input.

/******************************/
/* ProcessTrivia */
/* accept input for trivia */
/******************************/
function ProcessTrivia($triviachoice,$reporteduser,$gamenumber)
{
 $playernumber = GetAccountNumberFromEmail($reporteduser);
 $roundnumber = GetRoundNumber($gamenumber);
 // echo '<p align="center">New trivia with input '.$triviachoice.' for player '.$reporteduser.' and game number '.$gamenumber.' and round '.$roundnumber.'</p>'; /* DEBUG */
/* STORE THE PLAYER TRIVIA CHOICE */
$title = 'rd'.$roundnumber.'trivia1';
$query = "UPDATE games SET ".$title." = ".$triviachoice." WHERE gamenumber=".$gamenumber.";";
$updateresult = mysql_query($query);
if(!$updateresult)
 {
 echo "<p>failed data base insert with error message ".mysql_error()."</p>";
 }
/* FIND CORRECT TRIVIA ANSWER */
$selecttitle = 'rd'.$roundnumber.'trivia';
$selectquery = "SELECT ".$selecttitle." FROM games WHERE gamenumber=".$gamenumber." ";
$selectresult = mysql_query($selectquery);
if(!$selectresult)
 {
 echo "<p>failed data base insert with error message ".mysql_error()."</p>";
 }
$row = mysql_fetch_array($selectresult);
$correctanswer = $row[$selecttitle];
/* REPORT TRIVIA RESULT */
if ($correctanswer == $triviachoice)
 echo '<h1 align="center"><span style="color:green">Correct answer!</span>';
else
 echo '<h1 align="center"><span style="color:red">Wrong answer!</span>';
 echo '<br>Slam or love a celebrity!</h1>';
} /* ProcessTrivia */

return to explanation of source code

process love answer
eleventh pass

Add the love or like button.

 $slamchoice = $_GET['slam']; /* have a celebrity slam input for a specific game */
 $lovechoice = $_GET['love']; /* have a celebrity love input for a specific game */
 …
elseif ( $slamchoice != '' )
 NewRoundAfterSlam($slamchoice,$reporteduser,$gamenumber);
elseif ( $lovechoice != '' )
 NewRoundAfterLove($lovechoice,$reporteduser,$gamenumber);

/******************************/
/* NewRoundAfterLove */
/* accept input for new round */
/******************************/
function NewRoundAfterLove($gamechoice,$reporteduser,$gamenumber)
{
 $playernumber = GetAccountNumberFromEmail($reporteduser);
 UpdatePlayerLove($gamechoice,$playernumber,$gamenumber); /* located in gamefunctions.php */
 $newround = UpdateRoundResults($gamechoice,$playernumber,$gamenumber); /* located in gamefunctions.php */
 if ( $newround == 11 )
 DisplayEndGame($playernumber,$gamenumber); /* located in gamefunctions.php */
 else
 DisplayVillainsRound($playernumber,$gamenumber); /* located in gamefunctions.php */
} /* NewRoundAfterLove */

return to explanation of source code

create game object
twelfth pass

Create the game object and use it to store the game number.

Include:

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

Creation code:

 $currentgame = new GameObject;
 $currentgame->SetGameNumber($gamenumber);

Replace all reads of the $gamenumber variable with an object method.

 $currentgame->GetGameNumber($gamenumber)

return to explanation of source code

celebrity information block
thirteenth pass

Have the server provide information on a celebrity.

 $celebrityinfo = $_GET['celebrityinfo']; /* have a celebrity information request */
 …
elseif ( $celebrityinfo != '' )
 {
 require_once('./php/celebrityinfo.php');
 ProcessCelebrity($celebrityinfo);
 }

return to explanation of source code

add slams and loves
fourteenth pass

Realized that we weren’t recording the slams or loves in the game database (just which celebrity the action was on, not what the action was). So some quick updates to record that information.

S = SLAM
L = LOVE

In the function NewRoundAfterSlam.

 $newround = UpdateRoundResults($gamechoice,$playernumber,$gamenumber,'S'); /* located in gamefunctions.php */

In the function NewRoundAfterLove.

 $newround = UpdateRoundResults($gamechoice,$playernumber,$gamenumber,'L'); /* located in gamefunctions.php */

return to explanation of source code

add new game segment for slots
fifteenth pass

Add new game segment for slots.

elseif ( $slotchoice != '' )
 ProcessSlots($slotchoice,$reporteduser,$gamenumber);

return to explanation of source code

add new game segment for slots
fifteenth pass

Add new game segment for slots.

Move new round stuff in NewRoundAfterSlam and NewRoundAfterLove.

/******************************/
/* NewRoundAfterSlam */
/* accept input for new round */
/* NOTE: used to be end of round - now slots follow */
/******************************/
function NewRoundAfterSlam($gamechoice,$playernumber,$gamenumber)
{
 //echo '<p align="center">New round with input '.$gamechoice.' for player '.$reporteduser.' and game number '.$gamenumber.'</p>'; /* DEBUG */
 UpdatePlayerSlam($gamechoice,$playernumber,$gamenumber); /* located in gamefunctions.php */
 $newround = UpdateRoundResults($gamechoice,$playernumber,$gamenumber,'S'); /* located in gamefunctions.php */
 DisplaySlotStart($playernumber,$gamenumber); /* located in gameserver.php */
 AddRoundTokens($playernumber); /* located in gamefunctions.php */
 $newround = UpdateRoundResults($gamechoice,$playernumber,$gamenumber,'S'); /* located in gamefunctions.php */
 if ( $newround == 11 )
 DisplayEndGame($playernumber,$gamenumber); /* located in gamefunctions.php */
 else
 DisplayCelebrityRound($playernumber,$gamenumber); /* located in gamefunctions.php */
} /* NewRoundAfterSlam */
/******************************/
/* NewRoundAfterLove */
/* accept input for new round */
/* NOTE: used to be end of round - now slots follow */
/******************************/
function NewRoundAfterLove($gamechoice,$playernumber,$gamenumber)
{
 //echo '<p align="center">New round with input '.$gamechoice.' for player '.$reporteduser.' and game number '.$gamenumber.'</p>'; /* DEBUG */
 UpdatePlayerLove($gamechoice,$playernumber,$gamenumber); /* located in gamefunctions.php */
 $newround = UpdateRoundResults($gamechoice,$playernumber,$gamenumber,'L'); /* located in gamefunctions.php */
 DisplaySlotStart($playernumber,$gamenumber); /* located in gameserver.php */
 AddRoundTokens($playernumber); /* located in gamefunctions.php */
 $newround = UpdateRoundResults($gamechoice,$playernumber,$gamenumber,'L'); /* located in gamefunctions.php */
 if ( $newround == 11 )
 DisplayEndGame($playernumber,$gamenumber); /* located in gamefunctions.php */
 else
 DisplayCelebrityRound($playernumber,$gamenumber); /* located in gamefunctions.php */
} /* NewRoundAfterLove */

Modify dispatcher:

/* INITIALIZATIONS */
if(empty($_GET))
 { /*go away if no valid requests */
 return;
 }
else
 { /*collect input from user */
 $startcode = $_GET['start']; /* have a request to start a specific game */
 $slamchoice = $_GET['slam']; /* have a celebrity slam input for a specific game */
 $lovechoice = $_GET['love']; /* have a celebrity love input for a specific game */
 $triviachoice = $_GET['trivia']; /* have a trivia input for a specific game */
 $gamenumber = $_GET['game']; /* have a game number */
 $celebrityinfo = $_GET['celebrityinfo']; /* have a celebrity information request */
 $slotchoice = $_GET['slotchoice']; /* finish up slot round */
 $advanceround = $_GET['advanceround']; /* advance to new round */
 } /* END if on GET */
/* dispatch based on what game activity requested */
if ( $startcode != '' )
 StartGame($startcode,$playernumber);
elseif ( $slamchoice != '' )
 NewRoundAfterSlam($slamchoice,$reporteduser,$gamenumber);
elseif ( $lovechoice != '' )
 NewRoundAfterLove($lovechoice,$reporteduser,$gamenumber);
elseif ( $triviachoice != '' )
 ProcessTrivia($triviachoice,$reporteduser,$gamenumber);
elseif ( $slotchoice != '' )
 ProcessSlots($reporteduser,$slotchoice); /* slot choice is game number */
elseif ( $advanceround != '' )
 AdvanceNewRound($reporteduser,$advanceround); /* advance round is game number */
elseif ( $celebrityinfo != '' )
 {
 require_once('./php/celebrityinfo.php');
 ProcessCelebrity($celebrityinfo,$reporteduser,$gamenumber);
 }

return to explanation of source code

add tokens with slam or love
sixteenth pass

Add tokens with any slam or love.

/******************************/
/* NewRoundAfterSlam */
/* accept input for new round */
/* NOTE: used to be end of round - now slots follow */
/******************************/
function NewRoundAfterSlam($gamechoice,$playernumber,$gamenumber)
{
 //echo '<p align="center">New round with input '.$gamechoice.' for player '.$reporteduser.' and game number '.$gamenumber.'</p>'; /* DEBUG */
 UpdatePlayerSlam($gamechoice,$playernumber,$gamenumber); /* located in gamefunctions.php */
 $newround = UpdateRoundResults($gamechoice,$playernumber,$gamenumber,'S'); /* located in gamefunctions.php */
 DisplaySlotStart($playernumber,$gamenumber); /* located in gameserver.php */
// AddRoundTokens($playernumber); /* located in gamefunctions.php */
} /* NewRoundAfterSlam */
/******************************/
/* NewRoundAfterLove */
/* accept input for new round */
/* NOTE: used to be end of round - now slots follow */
/******************************/
function NewRoundAfterLove($gamechoice,$playernumber,$gamenumber)
{
 //echo '<p align="center">New round with input '.$gamechoice.' for player '.$reporteduser.' and game number '.$gamenumber.'</p>'; /* DEBUG */
 UpdatePlayerLove($gamechoice,$playernumber,$gamenumber); /* located in gamefunctions.php */
 $newround = UpdateRoundResults($gamechoice,$playernumber,$gamenumber,'L'); /* located in gamefunctions.php */
 DisplaySlotStart($playernumber,$gamenumber); /* located in gameserver.php */
// AddRoundTokens($playernumber); /* located in gamefunctions.php */
// $newround = UpdateRoundResults($gamechoice,$playernumber,$gamenumber,'L'); /* located in gamefunctions.php */
// if ( $newround == 11 )
// DisplayEndGame($playernumber,$gamenumber); /* located in gamefunctions.php */
// else
// DisplayCelebrityRound($playernumber,$gamenumber); /* located in gamefunctions.php */
} /* NewRoundAfterLove */

return to explanation of source code

calculate account number before dispatcher
seventeenth pass

Move the calculation of the account number to before the dispatcher.

$playernumber = GetAccountNumberFromEmail($reporteduser);
/* dispatch based on what game activity requested */
if ( $startcode != '' )
 StartGame($startcode,$playernumber);
elseif ( $slamchoice != '' )
 NewRoundAfterSlam($slamchoice,$playernumber,$gamenumber);
elseif ( $lovechoice != '' )
 NewRoundAfterLove($lovechoice,$playernumber,$gamenumber);
elseif ( $triviachoice != '' )
 ProcessTrivia($triviachoice,$playernumber,$gamenumber);
elseif ( $slotchoice != '' )
 ProcessSlots($playernumber,$slotchoice); /* slot choice is game number */
elseif ( $advanceround != '' )
 AdvanceNewRound($playernumber,$advanceround); /* advance round is game number */
elseif ( $celebrityinfo != '' )
 {
 require_once('./php/celebrityinfo.php');
 ProcessCelebrity($celebrityinfo,$playernumber,$gamenumber);
 }

return to explanation of source code

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Copyright © 2013 Milo

Last Updated: December 20, 2013

Created: September 30, 2013

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