Flat file, Javascript Alert Online Users Thingy?

[Protege]

Here you go, Thought id create it as I was bored... could be drastically changed.

index.php

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>

<head>
    <meta http-equiv="content-type" content="text/html; charset=iso-8859-1">
    <meta name="author" content="James Rozee">

    <title>Javascript AJAX Alert Thingy</title>
</head>
<script type="text/javascript">
function checkAlerts ()
{
    if ( window.XMLHttpRequest )
    {
        Ajax = new XMLHttpRequest ();
    }
    else if ( window.ActiveXObject )
    {
       Ajax = new ActiveXObject( "Microsoft.XMLHTTP" );
    }
    Ajax.open( "POST", "alertCheck.php", true );
    Ajax.onreadystatechange = alertUsers;
    Ajax.setRequestHeader( "Content-Type", "application/x-www-form-urlencoded" );
    Ajax.send( "null" );
}
function alertUsers ()
{
    if ( Ajax.readyState == 4 )
    {
        if ( Ajax.status == 200 )
        {
            if ( Ajax.responseText == "Error" )
            {
                // Repeat check, this is probably bad practice...?
                checkAlerts ();
            }
            else
            {
                alert ( Ajax.responseText );
                checkAlerts ();
            }
        }
    }
}

</script>

<body onLoad="checkAlerts()">

</body>
</html> 

alertCheck.php

<?php
session_start ();
/**
 * @copyright 2008 - James Rozee - DisasterPiece
 * @about hmm, alert users
 */

require_once ( 'alertFunctions.php' );

$alert = grabAlerts ();
if( $alert == 'Error' )
{
    echo ( 'Error' );
}
else
{
    if ( $parts = explode( '.@~hash', $alert ) )
    {
        if ( $parts[ 1 ] - date("dmogi") >= 0 )
        {
            if( $_SESSION[ 'alertCheck' ] == $parts[ 0 ] )
            {
                echo ( 'Error' );
            }
            else
            {
                $_SESSION[ 'alertCheck' ] = $parts[ 0 ];
                echo ( $parts[ 0 ] );
            }
        }
        else
        {
            echo ( 'Error' );    
        }
    }
    else
    {
        echo ( 'Error' );
    }
}
?>

alertFunctions.php

<?php

/**
 * @copyright 2008 - James Rozee - DisasterPiece
 * @about hmm, alert users
 */


function alertUsers ( $message )
{
    $fileAlerts = 'alerts.txt';
    if ( $message == '' )
    {
        return 'You can\'t send a blank message to users, thats just stupid...';
    }
    elseif ( $message != '' )
    {
        $fileHandle = fopen ( $fileAlerts, 'w' ) or die ( 'Sorry, failed to open that file.' );
        if ( ! fwrite ( $fileHandle, $message . '.@~hash' . date("dmogi") ) )
        {
            return 'Failed to write to file...';    
        }
        else
        {
            return 'Current users should receive the alert in the next 60 seconds...';
        }
    }
}

function grabAlerts ()
{
    $fileAlerts = 'alerts.txt';
    if ( ! $fileHandle = fopen ( $fileAlerts, 'r' ) )
    {
        return 'Error';
    }
    else
    {
        if ( ! $stringAlert = fread ( $fileHandle, filesize ( $fileAlerts ) ) )
        {
            return 'Error';
        }
        else
        {
            return $stringAlert;
        }
    }
}


?>

alertSubmit.php

<?php

/**
 * @copyright 2008 - James Rozee - DisasterPiece
 * @about hmm, alert users
 */

require_once ( 'alertFunctions.php' );

if ( $_GET[ 'message' ] == '' )
{
    
}
elseif ( $_GET[ 'message' ] != '' )
{
    echo ( alertUsers( strip_tags ( $_GET[ 'message' ] ) ) );
}
?>

You will need to create a text file "alerts.txt", inside DIR of the files that start with "alert"

You cannot send the same alert twice in a consecutive period.
To send an alert, you will need to go alertSubmit.php?message=message here
Use method GET on a form, manually do it or change it to POST and post it via form.

Download all the files at once? - (*.zip) - Click here

Also, I know I didn't leave my cPanel information on this script

try it, http://www.jamesrozee.com/alertUsers/index.php - Stay on that page whilst you send an alert via this page http://www.jamesrozee.com/alertUsers...echangemexlala