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PHP - Php Session Timer
I don't know if this can be done in PHP, but what I'm wanting to do is calculate the amount of time a user has spent in a session. I am planning on making a script that allows users to race through questions and the person who does it the fastest is the winner. Could someone help me out with this? Thanks
Similar TutorialsIs it possible to set a certain session to time out after say 2 minutes. I want to lock a person from seeing a page for 2 minutes then destroy the session yet keep the primary session and still keep dpoing what they were doing? Just curious. Thanks, I am trying to create an index page which contains registration and login field the problem that i get is on successful login a warning is displayed session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at C:\xampp\htdocs\Eventz.com\index.php:116) in C:\xampp\htdocs\Eventz.com\index.php on line 235 This is the login part of my index.php this tag is inside an html table below the login form I also have a registration form and its php code above the login form Code: [Select] <?php if (isset($_REQUEST['pass'])) { $id=$_POST['id']; $pass=$_POST['pass']; $conn =mysql_connect("localhost","root",""); if (!$conn) { die('Could not connect: ' . mysql_error()); } /* checking connection....success! */ $e=mysql_select_db('test', $conn); if(!$e) { die(''.mysql_error()); } else { echo 'database selected successfully'; } if (isset($_REQUEST['id']) || (isset($_REQUEST['pass']))) { if($_REQUEST['id'] == "" || $_REQUEST['pass']=="") { echo "login fields cannot be empty"; } else { $sql=mysql_query("Select email,password from login where email='$id' AND password='$pass'"); $count=mysql_num_rows($sql); if($count==1) /* $count checks if username and password are in same row */ { session_start(); $_SESSION['id']=$id; echo "</br>Login Successful</br>"; } else { echo "</br>invalid</br>"; echo "please try to login again</br>"; } } } } ?> Any help or suggestion would be appreciated I am having trouble resolving an error. Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/s519970/public_html/header.php:27) in /home/s519970/public_html/admin/login.php on line 2 What I can gather is I can't use "header (Location: 'admin.php')" after i've used session_start(). I have tried to replace the header (Location: 'admin.php') with this: echo "<script>document.location.href='admin.php'</script>"; echo "<script>'Content-type: application/octet-stream'</script>"; I've been trying to read up on solutions but haven't been able to get it sorted. If anyone can offer some advice that would be greatly appreciated as im new to php. Code: [Select] <?php session_start(); if(isset($_SESSION['user'])) echo "<script>document.location.href='admin.php'</script>"; echo "<script>'Content-type: application/octet-stream'</script>"; ?> <div id="loginform"> <form action="dologin.php" method="post"> <table> <tr> <td><span>Username:</span></td> <td><input type="text" name="username" /></td> </tr> <tr> <td><span>Password:</span></td> <td><input type="password" name="password" /></td> </tr> <tr> <td colspan="2" align="right"><input type="submit" name="login" value="Login" /></td> </tr> </table> </form> </div> I have tried using require_once('yourpage.php'); before my <head></head> tags in the header document where I've specified the html information but this doesn't seem to work. I've been advised to use ob_start("ob_gzhandler"); but I am not sure how to implement this. Any advice is greatly appreciated! in this page http://maximaart.com/newscp/ i have this problem Code: [Select] Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/maximasy/public_html/newscp/index.php:1) in /home/maximasy/public_html/newscp/index.php on line 2 my source code is <?php session_start(); include_once("config.php"); include_once("functions.php"); $errorMessage = ''; if (isset($_POST['txtUserId']) && isset($_POST['txtPassword'])) { if ($_POST['txtUserId'] === "$user" && $_POST['txtPassword'] === "$pass") { // the user id and password match, $_SESSION['basic_is_logged_in'] = true; require("main.php"); exit;?> hi everyone. i'm wondering what the best way is to create a session variable and pass it to an iframe. i need to do something along these lines, but it doesn't seem to pass the ID. Any hints on how i should accomplish this? Code: [Select] session_start(); $_SESSION['ID']=$_GET['ID']; // id from previous page $ID=session_id(); <iframe src="iframepage.php?ID=<?php echo $ID; ?>" style="width:680px; height:200px;" noresize="noresize" frameborder="0" border="0" scrolling="Yes" allowtransparency="true" /> </iframe> I'm making a simple login system with MySQL and PHP (very simple, I'm just starting with PHP). The MySQL portion is done, but I need to ensure only people who are logged in can see certain content. To check if people are logged in, my website checks that they have the $_SESSION['user'] variable set. If it is set, then it lets them continue through the website, if not, it tells them to login. Is that enough security, or can people simply inject a session cookie into their browser to spoof that they are logged in? My idea was to generate a session key cookie when they login (just a random string of letters and numbers) and store that in the database, then on every page, check to make sure their session key is the same thing that's in the database. Is this necessary? It seems expensive. Just curious how other people feel about this. I am working on an application where a lot of info is pulled from MySQL and needed on multiple pages.
Would it make more sense to...
1. Pull all data ONCE and store it in SESSION variables to use on other pages
2. Pull the data from the database on each new page that needs it
I assume the preferred method is #1, but maybe there is some downside to using SESSION variables "too much"?
Side question that's kind of related: As far as URLs, is it preferable to have data stored in them (i.e. domain.com/somepage.php?somedata=something&otherdata=thisdata) or use SESSION variables to store that data so the URLs can stay general/clean (i.e. domain.com/somepage.php)?
Both are probably loaded questions but any possible insight would be appreciated.
Thanks!
Greg
Edited by galvin, 04 November 2014 - 10:30 AM. Evening! I've been iffing and ahhing over this and well im not too sure, hence the post. Code: [Select] // Redirects if there is no session id selected and echos the error on the previous page if(!isset($_GET['get']) || ($_GET['getget'])){ header("Location: #.php?error"); } So it should simply check if get is set if it isnt then see if getget is set? If not redirect and show the error. Now ive tried it and even when get/getget is set it still redirects, probably something silly. Care to share anyone? Harry. Hello. Well i'm trying to make a timer to execute some code. Basically I want 3 minutes, every 3 minutes a piece of code is activated, then another 3 minutes later it does so again. But I have tried different ways of doing this, I tried with cookies and found out the person with the cookie is the only one that can refresh the page to activate the code. Same with sessions. And all the others are usually interrupted and start the timer again when the page reset. So yeah, I don't want it to be interrupted by refreshing. So any help please? I also tried with timestamps, this has proven to be the best way but I can never get it working 100% How am i able to setup a countdown timer? I use the time(); function and want to compare that time with another time that is 8 hours ahead to form a countdown timer, how am i able to do this using php? Hey Guy's
I need a quick fix to solve an urgent problem..
I used to do some coding years ago but the old grey matter is not so responsive these days and I have been up all night trying to resolve a problem.
I have built a website for my daughters and created a simple web form but I have come unstuck. All those skills I once took for granted are gone.
So here's where I am at. I've created an input form_mail.html, a contact.php and a reply.html page uploaded them to the Server and hit an error when I tried to send a message. The problem it seems is with the PHP.ini File.
In short I don't have one Duh! Yes I know I should go back and study and that much I intend to do I am currently installing xxampp, MySQL and php on my new laptop.
But in the meantime I need your help urgently..
What code do I need in the php.ini file to make the Form Mail work?
Is there somewhere on the web where I can see a simple code, I am just too tired to wade through heavy docs right now.
Your help would be much appreciated at this time.
Sincerely
Tam
Can someone show me the way? I am creating a online examination with time pressured. For example Part I of examination is only good for 20 mins. now if 20 mins is over it will be lock or good as submit. How will I do that? tnx everyone. I am looking for a tutorial or advice wherein I can create a timer for my auction items. You can see those timers on the site like quibids.com The concept is like this. I post and auction and set an end time for the auction. When the auction is live, The timer will start and will show how many hours and seconds are remaining. If any one has a class or some link to a tutorial site, that'll be a great help. Thanks a lot. Can anyone help me to make a countdown timer in php? so basically i've made a quiz.. but i want it to have a time of 1 hour 30 mins.. but i dont have any idea of how to make a timer Hi, I'm new to the forum, I have a slight issue with my script. Basically, I need to figure out a script that will allow me to do the following: - The user defines x amount of ours to count down (ie. 16 hours, 8 hours, 4 hours) - The script then starts the count down of the x hours - I need the script to count between 08:00 - 20:00 after 20:00 it needs to stop, then start again at 08:00 - The script also need to stop throughout the weekend (ie counts until 20:00 on friday, stops saturday & sunday, then starts 08:00 on monday) Can this be done? If so, any pointers or help? Many thanks, Lewis. Hi im trying to Make a Timer count down in this code function getTime($host, $user, $pass, $db, $hours, $ip, $serverId) { $c = @mysql_connect($host, $user, $pass); if(mysql_select_db($db, $c)) { $dateQ = mysql_query('SELECT MAX(date) AS lastVoteDate FROM `'. $db .'`.`votes` WHERE ip="'. $ip .'"') or die(mysql_error()); $getDate = mysql_fetch_assoc($dateQ); $diffrence = time() - strtotime($getDate['lastVoteDate']); $hours = number_format(($diffrence / 60 / 60)); $minutes = number_format(($hours / 60)); if(!$hours < 1){ return ("". $hours .""); } else { return ("0"); } } else { return array(1, "Error connecting to DB."); } } Can anyone help me with a 60 second timer for my website. I want to display the following text to my customers at the top of the page: "You will be automatically redirected to homepage in [timer]" In my header I have the following code: <meta http-equiv="refresh" content="61;url=home.php"> Here's the code for the countdown timer. It works. At the end of the countdown, it's suppose to show the message "EXPIRED". But that message only shows once I reload the page. The countdown itself stops at 00:00:01. Is there a way to automatically show the message after that, instead of reloading the page to show it?
<style>
div#counter{
margin: 100px auto;
width: 305px;
padding:20px;
border:1px solid #000000;
}
div#counter span{
background-color: #00CAF6;
padding:5px;
margin:1px;
font-size:30px;
}
</style>
<?php
$target_date = '2019-01-12 05:40:00';
$timeLeft = (strtotime($target_date) - time()) * 1000;
?>
<script src="javascripts/timer.js"></script>
<script>
$(document).ready(function(){
var timeLeft = <?php echo $timeLeft ; ?>;
var timer = new Timer($('#counter'), timeLeft);
if (timeLeft <= 0) {
$('#counter').text('EXPIRED');
}
});
</script>
<div id="counter">
<span class="hour">00</span>
<span class="min">00</span>
<span class="sec">00</span>
</div>
Edited January 11, 2019 by imgrooot I am currently in the process of creating an online time based game. One of the big things is that users get gold every half an hour :00 & :30. What I am trying to do is offer a physical clock so that users can see how much time is left before they more more gold. I have been trying to do this using PHP. All I have currently is the time, but would like something like "$minutes until more gold". This is currently what I have now: (added 1 hour for EST.) <?php echo date("h:i A",time()+60*60); ?> Hi all, I would like to create a timer showing a countdown from 0% to 100% (representing "power") ending at noon GMT on Sunday 4th September. The countdown started a few weeks ago, hence as of 1pm GMT on Tuesday 1st March, the countdown should be at 15% The "power" increases by 5% every 11 days so by my calculations, the percentage in our countdown should increase by 0.01% every 1900.8 seconds. So, with this theory, how would I go about coding it? I guess since I use GMT, I need to take a timestamp in GMT first, then calculate the difference between this and Sunday 4th September at 12.00pm. I am not sure though which format of time/date is best to do the calculation. Would it be better to use Unix time? Any help, suggestions and/or code is greatly appreciated. Skulty |
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