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example source code
login.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.

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example source code
login.php

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

first pass

    This code simply establishes a data base connection and reports success or failure.

    The PHP people have deprecated the functions I am using as of PHP 5.5.0, so this is something I will have to clean up. Because I am under time pressure with bad equipment, I will clean it up later.

<?php

/******************************/
/* DisplayLoginForm                                     */
/* draw form                                                */
/* called from index.php                               */
/******************************/
function DisplayLoginForm()
{
?>
<div id="loginarea">
<form name="login" method="post" action="./index.php?action=login">
<table align="center" border="0" width="100%">
<tr><td align="left">Email<br><input type="text" name="email" maxlength="50" size="20"></td><td align="left">Password<br><input type="text" name="password" maxlength="50" size="20"></td><td align="center"><input type=submit value="Log in"></td></tr>
</table>
</form>
</div><!--loginarea-->
<?php 

} /* DisplayLoginForm */

/******************************/
/* ProcessLoginForm                                    */
/* process form                                            */
/* called from index.php                               */
/******************************/
function ProcessLoginForm()
{
require_once('./php/visitorauthorization.php');

//create short variable names from POST data
$email = ValidateInputforSQL($_POST['email'],'string','');
$passwd = ValidateInputforSQL($_POST['password'],'string','');

    $result = LoginVisitor($email, $passwd); /* located in visitorauthorization.php */
    /* zero = good login; negative number indicates failure code */
    if ($result == 0)
    { /* successful login */
      // if they are in the database, register the user id
?>
<div><h3 align="center">welcome back <?php echo $email; ?></h3></div>
<?php 
      $_SESSION['valid_user'] = $email;
      return $email;
    }  /* END successful login */
    else
    {
      // unsuccessful login
      echo "<h3 align=\"center\" style=\"color:#ff0000\">Failure to login</h3>";
      return '';
    }  /* END failed login */

} /* ProcessLoginForm */

?>

return to explanation of source code

minor account change

    Instead of displaying the player’s email address, we display the screen name. This is a very minor change.

?>
<div><h3 align="center">welcome back <?php echo GetAccountNameFromAccountNumber(GetAccountNumberFromEmail($email)); ?></h3></div>
<?php 

return to explanation of source code


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    A web site on dozens of operating systems simply can’t be maintained by one person. This is a cooperative effort. If you spot an error in fact, grammar, syntax, or spelling, or a broken link, or have additional information, commentary, or constructive criticism, please e-mail Milo. If you have any extra copies of docs, manuals, or other materials that can assist in accuracy and completeness, please send them to Milo, PO Box 1361, Tustin, CA, USA, 92781.

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    Names and logos of various OSs are trademarks of their respective owners.

    Copyright © 2013 Milo

    Last Updated: October 14, 2013

    Created: September 25, 2013

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