I have following problem, I am trying to set cookies without any success. setcookie(); function returns true so it looks like it setting cookie however when I am trying to access it on the same or following page I get error 'Undefined Index....'
<?
session_start();
ob_start();
echo setcookie("order",$_SESSION['cart'],time()+3600,'/',NULL);
//added to see if Cookie is set
echo "<br/>";
var_dump($_COOKIE);
exit();
if($_GET['paypal'] == 1){
header("Location: /paypal-express-checkout/process.php");
}else{
header("Location: /insert_order.php");
}
ob_end_flush();
exit();
?>
next page follows like this
<?php
session_start();
include_once("../includes/inc_config.php");
include_once("../order.php");
include_once("config.php");
include_once("paypal.class.php");
#region POST
if(!isset($_GET['token'])) //Post Data received from product list page.
{
//Mainly we need 4 variables from an item, Item Name, Item Price, Item Number and Item Quantity.
if(!isset($_COOKIE['order'])){
exit();
}
$paypal_data = '';
$ItemTotalPrice = 0;
$order = unserialize($_COOKIE['order']);
print_r($order);
exit;
You are setting the domain value to NULL. Try leaving the NULL away:
echo setcookie("order",$_SESSION['cart'],time()+3600,'/');
OR set it to your domain:
echo setcookie("order",$_SESSION['cart'],time()+3600,'/',".yourdomain.com");
I would var_dump or print_r the $_COOKIE variable before I make a decision that it's not getting passed through. Holding that thought once you setcookie something gets registered into the $_COOKIE variable for sure.
I agree with the statements above since you only can access $_COOKIE on the next refresh but there is another way to do it to make your form or page more interactive.
I would register the cookie and use a php page refresh (display a working... div while thats happening) then come back to the page and try to do what you originally tried doing. Very basic but pretty much straight forward.
Related
I created an app to receive and tally votes. I am trying to make the voter's selection carry over to a confirmation page so that I can display the name of the candidate for whom they voted on the confirmation page.
I am trying to use $_SESSION on the variable of the selected candidate from the voter's submission, and then call the variable on the confirmation page, however I continue to get undefined variable error.
voterSubmit.php:
<?php
$selectedCandidate = $_POST['candidateid'];
session_start();
$selection = $_SESSION[$selectedCandidate];
//Redirect to results page
header("Location: views/confirmation.php");
confirmation.php
<?php
session_start();
$_SESSION[$selectedCandidate] = $selection;
include "views/confirmation.php";
confirmation view:
<?php include "../partials/header.php"; ?>
<h1>Thanks For Your Vote!!</h1><br>
//This is where the error occurs (on my selection variable):
<h2>You voted for <?=$selection?>
View Results
<?php include "../partials/footer.php"; ?>
I want the name of the selected candidate to appear on the confirmation page by way of the $selection variable. However, all I receive on the front end is an "undefined variable" error. I also would like to note that instead of using the $selectedCandidate variable in my session, I have also tried grabbing the name directly by just using the name of the radio button selection as such:
$_SESSION['candidateid'] = $selection
I also would like to mention that i have tried the reverse:
on confirmation.php:
session_start();
$selection = $_SESSION[$selectedCandidate];
on voteSubmit.php:
session_start();
$_SESSION[$selectedCandidate] = $selection;
Your using the $_SESSION variable incorrectly.
Try:
voterSubmit.php:
<?php
$selectedCandidate = $_POST['candidateid'];
session_start();
$_SESSION['selectedCandidate'] = $selectedCandidate;
//Redirect to results page
header("Location: views/confirmation.php");
confirmation.php
<?php
session_start();
$selection = $_SESSION['selectedCandidate'];
include "views/confirmation.php";
voterSubmit.php looks ok... but I don't understand why you have include "views/confirmation.php"; in the confirmation.php file.
<?php
session_start();
$_SESSION[$selectedCandidate] = $selection;
include "views/confirmation.php";
Try coding your HTML/PHP this way:
<?php
/* confirmation.php */
session_start();
$_SESSION[$selectedCandidate] = $selection;
require_once("../partials/header.php");
//This is where the error occurs (on my selection variable):
echo <<<_STRT
<h1>Thanks For Your Vote!!</h1><br>
<h2>You voted for $selection</h2>
<p>View Results</p>
_STRT;
require_once("../partials/footer.php");
?>
I essentially eliminated a lot of start/stop code. The start of your PHP recalls the session and variable. Then I go into the HTML portion to provide the results to your site visitor. Give it a shot. Comment on it if it doesn't resolve your issue so we can rethink it.
I think session_start() needs to be the first line after the php tag.
$_SESSION is an array. So you need to assign it values like:
$_SESSION['keyname'] = $value;
voterSubmit.php:
<?php
session_start();
$_SESSION['selectedCandidate'] = $_POST['candidateid'];
//Redirect to results page
header("Location: views/confirmation.php");
confirmation.php
<?php
session_start();
$selection = $_SESSION['selectedCandidate'];
include "views/confirmation.php";
There are 2 issues in your code :
session_start() defined in the wrong place.
Wrong way of assigning value to your session variable.
Answer :
session_start() should be the first thing defined after your php
tag.
Correct way to declare session variables is : $_SESSION["selectedCandidate"] = $selectedCandidate; where, $selectedCandidate is the value to be assigned to your session variable, named selectedCandidate.
You have done 2 mistakes in your code:
1. Session should be defined in starting of page it means you have to define it like this:
<?php
session_start();
//php code goes here.
?>
2.wrong initialization of session variable .you should do it like this:
<?php
$_SESSION['selectedCandidate']=$selectedCandidate;
?>
Im trying to figure out how to use a php $_SESSION value. The situation is:
Main HTML site has an <iframe> that loads products.php
Within products.php a form submits and saves the two values below:
$_SESSION["subtotal"] = $_POST['SUBT'];
$_SESSION["tax"] = $_POST['TAX'];
These work well I can echo them no problem (within that page)
This page replaces products.php with confirmation.php
Once in the confirmation.php I am not able to grab the session values. I have tried the following:
<?php
session_start();
$_SESSION["subtotal"] = $_POST['SUBT'];
$_SESSION["tax"] = $_POST['TAX'];
echo $_SESSION["subtotal"];
echo $_SESSION["tax"];
echo $subtotal;
echo $tax;
?>
AND
$_SESSION["subtotal"] = $subtotal;
$_SESSION["tax"] = $tax;
echo $_SESSION["subtotal"];
echo $_SESSION["tax"];
echo $subtotal;
echo $tax;
?>
AND
$subtotal = $new_subtotal;
$tax = $new_tax;
echo $new_tax;
echo $new_subtotal;
?>
All have failed to see $_SESSION - Is the value getting lost with the <iframe> change?
I have used the following code on the products.php page to confirm the session were susecssfully created - They are:
echo $_SESSION["subtotal"]." stored in session <br />";
echo $_SESSION["tax"]." stored in session <br />";
NOTES:
Both confirmation & products.php are on the same server.
print_r($_SESSION); Returns BLANK array.
session_start() is at the very top of both pages
Use something like this:
products.php
<?php
session_start();
$_SESSION['myValue']=$_GET['YourFormElement'];
//or
$_SESSION['myValue']=3; // You can set the value however you like.
?>
Any other PHP page:
<?php
session_start();
echo $_SESSION['myValue'];
?>
A few notes to keep in mind though: You need to call session_start() BEFORE any output, HTML, echos - even whitespace.
You can keep changing the value in the session - but it will only be able to be used after the first page - meaning if you set it in page 1, you will not be able to use it until you get to another page or refresh the page.
The setting of the variable itself can be done in one of a number of ways:
$_SESSION['myValue']=1;
$_SESSION['myValue']=$var;
$_SESSION['myValue']=$_GET['YourFormElement'];
And if you want to check if the variable is set before getting a potential error, use something like this:
if(!empty($_SESSION['myValue'])
{
echo $_SESSION['myValue'];
}
else
{
echo "Session not set yet.";
}
I did that once by adding $_SESSION to url inside iframe and in file that is used in iframe I used that $_SESSION by $_GET.
I am not sure 100% but it should work as:
$session = $_SESSION['session'];
<iframe src="somePage.php?s=<?php echo $session; ?>"></iframe>
somePage.php
if(isset($_GET['s'])){
$session = $_GET['s'];
}
I have a session variable that is updated when a link is clicked which adds GET variables to the current URL:
<?php
$_SESSION['test'] = 0;
if (isset($_GET['do'] && $_GET['do'] == 'this')) {
$_SESSION['test'] = $_SESSION['test'] + 1;
}
echo $_SESSION['test'];
?>
Click me
When the link is clicked, the new session value that is echoed is still 0.
Why? How do I get this to echo the updated value? (1)
EDIT: Yes, session_start() is included at the top of the page.
change it to be like this:
<?php
session_start();
if(!array_key_exists('test', $_SESSION)){
$_SESSION['test'] = 0;
}
if(array_key_exists('do', $_GET) && $_GET['do'] === 'this') {
$_SESSION['test']++;
}
echo $_SESSION['test'];
?>
Click me
I like array_key_exists() more than isset because the key can exist being null and still pass the test:
From the php docs: "isset() does not return TRUE for array keys that correspond to a NULL value, while array_key_exists() does."
You also were using isset incorrectly to test the contents of $_GET['do']. To top things off, you didn't start the session on each page load.
session_start() will initialize the $_SESSION variable and fill it with the appropriate contents. Since this was not in your code, the $_SESSION variable never had your 'do' key.
The second-to-last problem you had was the very first line, you were always setting the 'test' key to 0 causing the outcome to always be 1 after clicking Click me
and finally, you didn't close the php tag prior to outputting raw HTML which should have given you an error
Maybe you have not paste the whole code but here is how it should have been done.
<?php
session_start();
$_SESSION['test'] = 0;
if (isset($_GET['do']) && $_GET['do'] == 'this') {
$_SESSION['test'] += 1;
}
echo $_SESSION['test'];
?>
Click me
You need to start with session_start() Google to learn more about it.
You have put everything in the isset() Google isset() to learn more about it.
you need to close php tags before you can insert raw HTML. Inside HTML you can execute php with <?php ?> tags.
Hope this helps.
As mentioned before, you have everything wrapped in isset() should be
isset($_GET['do'])
not
isset($_GET['do']
Also, you're session is always being set to 0 on each page refresh. You need to only set $_SESSION['test'] = 0 if $_SESSION['test'] has not been set yet.
if (!isset($_SESSION['test'])) {
$_SESSION['test'] = 0;
}
You are missing session_start() at the top of your script. You're also not assigning the session if it doesn't previously exist, you're continuously setting it to 0 before incrementing.
I am redirecting to a different page with Querystring, say
header('location:abc.php?var=1');
I am able to display a message on the redirected page with the help of querystring value by using the following code, say
if (isset ($_GET['var']))
{
if ($_GET['var']==1)
{
echo 'Done';
}
}
But my problem is that the message keeps on displaying even on refreshing the page. Thus I want that the message should get removed on page refresh i.e. the value or the querystring should not exist in the url on refresh.
Thanks in advance.
You cannot "remove a query parameter on refresh". "Refresh" means the browser requests the same URL again, there's no specific event that is triggered on a refresh that would let you distinguish it from a regular page request.
Therefore, the only option to get rid of the query parameter is to redirect to a different URL after the message has been displayed. Say, using Javascript you redirect to a different page after 10 seconds or so. This significantly changes the user experience though and doesn't really solve the problem.
Option two is to save the message in a server-side session and display it once. E.g., something like:
if (isset($_SESSION['message'])) {
echo $_SESSION['message'];
unset($_SESSION['message']);
}
This can cause confusion with parallel requests though, but is mostly negligible.
Option three would be a combination of both: you save the message in the session with some unique token, then pass that token in the URL, then display the message once. E.g.:
if (isset($_GET['message'], $_SESSION['messages'][$_GET['message']])) {
echo $_SESSION['messages'][$_GET['message']];
unset($_SESSION['messages'][$_GET['message']]);
}
Better use a session instead
Assign the value to a session var
$_SESSION['whatever'] = 1;
On the next page, use it and later unset it
if(isset($_SESSION['whatever']) && $_SESSION['whatever'] == 1) {
//Do whatever you want to do here
unset($_SESSION['whatever']); //And at the end you can unset the var
}
This will be a safer alternative as it will save you from sanitizing the get value and also the value will be hidden from the users
There's an elegant JavaScript solution. If the browser supports history.replaceState (http://caniuse.com/#feat=history) you can simply call window.history.replaceState(Object, Title, URL) and replace the current entry in the browser history with a clean URL. The querystring will no longer be used on either refresh or back/previous buttons.
When the message prompt ask for a non exsisting session. If false, show the message, if true, do nothing. session_start(); is only needed, if there is no one startet before.
session_start();
if ($_GET['var']==1 && !isset($_SESSION['message_shown']))
{
$_SESSION['message_shown'] = 1;
echo 'Done';
}
Try this way [Using Sessions]
<?php
//abc.php
session_start();
if (isset ($_GET['var']))
{
if ($_GET['var']==1)
{
if(isset($_SESSION['views']))
{
//$_SESSION['views']=1;
}
else
{
echo 'Done';
$_SESSION['views']=1;
}
}
}
?>
Think the question mean something like this?
$uri_req = trim($_SERVER['REQUEST_URI']);
if(!empty($_SERVER['REQUEST_URI'])){
$new_uri_req = str_replace('?avar=1', '?', $uri_req);
$new_uri_req = str_replace('&avar=1', '', $new_uri_req);
$pos = strpos($new_uri_req, '?&');
if ($pos !== false) {
$new_uri_req = str_replace('?&', '?', $new_uri_req);
}
}
if( strrchr($new_uri_req, "?") == '?' ){
$new_uri_req = substr($new_uri_req, 0, -1);
}
echo $new_uri_req; exit;
You can use then the url to redirect without vars. You can also do the same in js.
str_replace() can pass array of values to be replaced. First two calls to str_replace() can be unified, and filled with as many vars you like that needs to be removed. Also note that with preg_replace() you can use regexp that can so manage any passed var which value may change. Cheers!
I am setting up a login form.
Expected Result:
Echo session username on page after successful login.
Actual Result:
Login is successful. Session username does not echo. Appears as though session username either does not exist or it is not persisting to the next page.
Is there something wrong with the code below?
LOGIN.PHP
...
session_start();
if (mysql_num_rows($result) ==1)
{
session_regenerate_id();
$row = mysql_fetch_assoc($result);
$profileid = $row['userid'];
$profile = $row['username'];
//Set session
$_SESSION['profileid'] = $profileid;
//Put name in session
$_SESSION['profile'] = $profile;
//Close session writing
session_write_close();
//Redirect to user's page
header("location: index.php?msg=userpage");
exit();
}
...
INDEX.PHP
...
<?php
session_start();
if($_GET['msg']=="userpage")
{
echo $_SESSION['profile'];
}
...
Edited:
Put session_start in php tags.
Changed HTML to INDEX.PHP.
"If" brace closed.
Changed while to if in LOGIN.PHP.
Changed username to userpage
You don't need to be opening/closing sessions, it's not worth the extra lines of code. I also don't know why you're regenerating the session ID.
But, one thing is your HTML file is badly constructed, and it almost looks like the session_start() isn't inside any PHP tags, so it's not even being treated as code.
first of all your HTML is yet PHP as it involves PHP tags only.
Replace while with if coz you only want to set the $_SESSION variables once.
And for the last part what you are looking for is this
<?php
session_start(); //at the beginning of your script
if($_GET['msg']=="username")
{
echo $_SESSION['profile'];
}
?>
Make sure you eliminate all the whitespaces before the opening of your first <?php tag on your script as that gives potential header errors.
close the if loop in html file
EDITED:
I did this simple code in my page and as per session concept is concerened The code is working fine...make corrections accordingly
p1.php
<?php
session_start();
//Put name in session
$_SESSION['profile'] = "Pranav";
//Close session writing
//Redirect to user's page
header("location: p2.php?msg=userpage");
exit();
?>
p2.php
<?php
session_start();
if($_GET['msg']=="userpage")
{
echo $_SESSION['profile'];
}
?>
FOR NEW SESSION ID
USE THIS
$a = session_id();