PHP - I Want A Code In Php To Check If User Open This Page

Hi, im a little stuck trying to work out how to do this.

I want to check it there is a mysql connection open on my page and if so, mysql_close($conn);... The reason is that my pages are on a dynamic template, and I would like to chuck this right at the end of the page.

is it possible?

Thank you, Shaun

I have hardware setup to preform an action on camera when i enter a url into the address bar. Pretty much you will be able to feed tarantulas.  I'd like to setup a button that my user can click that will active the url without being moved off of the current page.

I can't figure out how to stop the browser from following the link to a blank page. It messes the whole thing up because the feeder only runs for a second and if you get sent to the blank page and have to navigate back the the live video feed page you could miss the feeding.

Thanks for the help

Hi guys

Do you guys know if possible to open an external URL without actually displaying this to the user? We have a service where we wish to open an external URL which triggers sending out an SMS to the user.  However..we cannot display the url opened to the user as it shows our username etc with the sms provider.

basically the url looks like this:   

https://www.smsprovider.com/username=OurUsername&password=******&smsMsg_to_send=blablablablabla

Is it possible to "trigger" this URL without letting our users see it?

Thanks in advance for any help you may provide

I'm working on a light use/kiosk system. I have apache2 and php5 installed on Ubuntu 10.04 and I have the browser open the localhost web page by default. I would like to include a link on this page to open oowriter (open office writer) for the end user on the machine.

I've tried

Code: [Select]
exec('oowriter');
with no luck. I've also tried setting the DISPLAY value before the command like

Code: [Select]
exec('DISPLAY=:0 oowriter');
with no success. I don't mind have the www-data user in the sudoers file if I have to sudo the command or something, but is this possible to do?? I'm not having any luck at all!

Hi All - I'm trying to see if the below is possible using PHP.

is it possible for php to allow a user to check if a port is open/listening on a remote server/PC, from their local machine. I've seen scripts on the web that talk about opening cmd.exe - this won't work as not all of my users will be on windows. Also saw fsock.. but the remote server is not serving http page(s). Also saw telnet, but again, some of my users may not have that windows feature enabled.

Desired workflow:

1. user enters the server hostname/IP and a port

2. my php webapp will emulate checking if that hostname and port is open from the local user's computer.

 

thanks!

Hey guys,
How do I check to see if the user has been login on the page that they are on?
I have a login and I want users to login before then can go to other pages.
thanks guys,

Hi, I want have this code (below), how would I check if a user is logged in?  I want to make it so they can only see 500 chars, or the full thing if they're logged in.  Thanks! 
Code: [Select]
  public function __construct( $data=array() ) {
    if ( isset( $data['id'] ) ) $this->id = (int) $data['id'];
    if ( isset( $data['publicationDate'] ) ) $this->publicationDate = (int) $data['publicationDate'];
    if ( isset( $data['title'] ) ) $this->title = preg_replace ( "/[^\.\,\-\_\'\"\@\?\!\:\$ a-zA-Z0-9()]/", "", $data['title'] );
    if ( isset( $data['summary'] ) ) $this->summary = preg_replace ( "/[^\.\,\-\_\'\"\@\?\!\:\$ a-zA-Z0-9()]/", "", $data['summary'] );
    if ( isset( $data['content'] ) ) $this->content = $data['content'];
if ( isset( $data['tags'] ) ) $this->tags = $data['tags'];
  }

hi, how can i check if a username exists? i tried this 

$usrsql = "SELECT * FROM $tbl_name WHERE username='$username' AND password='$password'";
        $usrres = mysql_query($usrsql);
        $usrcount = mysql_num_rows($usrres);

        if($usrres && mysql_num_rows($usrcount)>0) {

            die("Username is already taken!");
        } 

Hi there,   I've been searching the internet for the best way to check if the user has been logged in. Some codes have security breaches. So I'm not sure where to start.   Here's what I've come up with:   The user logs in and is checked whether he/she is a valid user, if not return false and if true carry on and create session, I read the post that Jacques1 made about session feedback and implemented what he said. After that the session variables are assigned and then the user id, session_id and a unique identifier to check against on each page load are inserted into a database and then the user is logged in.   Here's my code: (please note this is in a class and only shows the login function)

function Login($username, $password)
	{
		try
		{
			$db = new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME.";charset=utf8", DB_USERNAME, DB_PASSWORD);
			$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
			$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
		}
		catch(PDOException $ex)
		{
			echo "Unable to connect to DB";
			error_log($ex->getMessage());
		}
		
		try
		{
			$User_Info = $db->prepare("SELECT * FROM users WHERE username=:username");
			$User_Info->bindValue(":username", $username, PDO::PARAM_STR);
			$User_Info->execute();
			$Info = $User_Info->fetchAll(PDO::FETCH_ASSOC);
			
			$salt = $Info['salt'];
			
			$password = $salt . $password;
			$password = $this->CreateHash($password);
			
			$unique_key = $this->GenerateRandom();
			$unique_key = $this->CreateHash($unique_key);		
			
			$Check_User = $db->prepare("SELECT * FROM users WHERE username=:username AND password=:password");
			$Check_User->bindValue(":username", $username, PDO::PARAM_STR);
			$Check_User->bindValue(":password", $password, PDO::PARAM_STR);
			$Check_User->execute();	
			
			if($Check_User->rowCount() > 0)
			{
				while($row = $Check_User->fetchAll(PDO::FETCH_ASSOC))
				{
					session_destroy();
					session_start();
					
					$_SESSION = array();
					
					session_regenerate_id(true);
					
					$_SESSION['username'] = $row['username'];
					$session_id = session_id();
					$user_id = $row['id'];
					
					$Check_Logged_In = $db->prepare("DELETE FROM logged_in_users WHERE user_id=:userid");
					$Check_Logged_In->bindValue(":user_id", $user_id, PDO::PARAM_STR);
					$Check_Logged_In->execute();
					$has_changed = $Check_Logged_In->rowCount();
					
					if($has_changed > 0)
					{
						$Logged_In = $db->prepare("INSERT INTO logged_in_users (id, user_id, session_id, unique_key) VALUES (NULL, :user_id, :session_id, :unique_key)");
						$Logged_In->bindValue(":user_id", $user_id, PDO::PARAM_STR);
						$Logged_In->bindValue(":session_id", $session_id, PDO::PARAM_STR);
						$Logged_In->bindValue(":unique_key", $unique_key, PDO::PARAM_STR);
						$Logged_In->execute();
						$affected_rows = $Logged_In->rowCount();
						
						if($affected_rows > 0)
						{
							return true;
						}
					}
					return false;
				}
			}

			return false;
		}
		catch(PDOException $ex)
		{
			echo "Unable to complete query";
			error_log($ex->getMessage());
		}
	}

Thanks

So let's say if contact_name wants to add member_name as a friend, how would i make it say user is already pending? what variables to check? or should i make friends table and a friends_pending table?

Hi guys,

I am trying to put together a little system that allows users to log onto my website and access there own personal page. I am creating each page myself and uploading content specific to them which cannot be viewed by anyone else.

I have got the system to work up as far as:

1/ The user logs in
2/ Once logged in they are re-directed to their own page using 'theirusername.php'

Thats all good and working how I need it too. The problem I have is this. If I log onto the website using USER A details - I get taken to USER A's page like I should but - If I then go to my browser and type in USERBdetails.php I can then access USER B's page.

This cannot happen!! I need for USER A not to be able to access USER B profile - there is obviously no point in the login otherwise! If you are not logged in you obviously cannot access any secure page. That much is working!

Please find below the code I am using:


LOGIN

<?php
session_start();


function dbconnect()
{
    $link = mysql_connect("localhost", "username", "password") or die ("Error: ".mysql_error());

}
?>

<?php
if(isset($_SESSION['loggedin']))
{
    header("Location:" . strtolower($username) . ".php");
if(isset($_POST['submit']))
{
   $username = mysql_real_escape_string($_POST['username']);
   $password = mysql_real_escape_string($_POST['password']);
   $mysql = mysql_query("SELECT * FROM clients WHERE username = '{$username}' AND password = '{$password}'");
   if(mysql_num_rows($mysql) < 1)
   {
     die("Password or Username incorrect! Please <a href='login.php'>click here</a> to try again");
   }   $_SESSION['loggedin'] = "YES";
   $_SESSION['username'] = $username;
 $_SESSION['name']
   header("Location:" . strtolower($username) . ".php");
}
?> 

HEADER ON EACH PHP PAGE

<?php
session_start();
if(!isset($_SESSION['loggedin']))
{
    die(Access to this page is restricted without a valid username and password);
?>

---------------------------------------------------

Am I right in thinking it is something to do with the "loggedin" part?

The system I have here is adapted from a normal login system I have been using for years. The original just checks the details and then does a 'session start'. This one obviously has to re-direct to a user specific page. To do this I used the <<header("Location:" . strtolower($username) . ".php");>> line to redirect to a page such as "usera.php" or "userb.php"

Any help would be greatly appreciated! 

Ta

Hi

I have a live chat integrated into my website that uses Ajax, PHP and MySQL.

When two people have the chat window open they can chat and it works fine.

How can I send an alert to the person being requested to chat with, or for the chat.php page to popup automatically.

It prob needs to be some function constantly running in the background check the DB for new message entries.

Thanks
Jay

Hi Guys,

Just a quick introduction I am NOT a student I am a IT Technician in a School in the South of the United Kingdom.

I am trying to write a PHP Script with a Function that Checks if the user is logged in, if the user is logged in then it shows the user the content on the page but if they are not logged in then to show a blank page with a link to the Login Page. I need it to be simple. I just want it to check if a useer is logged in but if there not only show some content on a page.

Can anyone help? My Users login into a php Session.

Thanks for any help you can offer.

Best Regards
Thomas

Hey, so I'm trying to check the database if the user and email already exists when registering.

<?php
include_once('includes/config.php');

if(isset($_POST['submit'])) {
	$username = $_POST['username'] ? trim($_POST['username']) : null;
	$password = md5($_POST['password']) ? trim($_POST['password']) : null;;
	$email = ($_POST['email']);
	$message = "";

	if(empty($username) || empty($password) || empty($email)) {
		$message = "All fields required";
	} else {
		$sql = "SELECT COUNT(username) AS userNum FROM users WHERE username = :username";
		$sql = "SELECT COUNT(email) AS emailNum FROM users WHERE email = :email";
		$stmt = $db->prepare($sql);

		$stmt->bindValue(':username', $username);
		$stmt->execute();

		$row = $stmt->fetch(PDO::FETCH_ASSOC);

		if($row['userNum'] >0) {
			die("That username already exists!");
		} elseif($row['emailNum'] > 0) {
			die("That email already exists!");
		}

		$sql = "INSERT INTO users (username, password, email) VALUES (:username, :password, :email)";
		$stmt = $db->prepare($sql);

		$stmt->bindValue(':username', $username);
		$stmt->bindValue(':password', $password);
		$stmt->bindValue(':email', $email);

		$result = $stmt->execute();

		if($result) {
			$message = "Registration was successful";
		}

	}
}
?>

If I remove this line "

$sql = "SELECT COUNT(email) AS emailNum FROM users WHERE email = :email";

the code works but only checks the username. How can I check both?