I'm trying to make a section of my website to support gambling (with game money, not irl)
Goal: Create a simple Buy Ticket, Wait for tickets to be all gone, randomly select winner. So the end user can buy any amount of tickets left up to the total of 8 available tickets and then the script will choose a winner out of the number of applicants that bought a ticket.
Current Issue: My main issue is having problems with PHP storing and retrieving data.
<form action="games.php" method"post" name="add_tickets">
<ul>
<li>
<input type="radio" name="ticket" value="one"><br>
<input type="radio" name="ticket" value="two"><br>
<input type="radio" name="ticket" value="three"><br>
<input type="radio" name="ticket" value="four"><br>
<input type="submit" value="submit">
</li>
</ul>
</form>
So I'm using Radio buttons for this. When a button is selected and submitted, it will post the data over to games.php.
Then on games.php I'll have my script do its job and when its finished it will redirect the user back to index.php where the form was and have the user's name ($username) beside the radio button he selected.
Here is games.php code: NOTE: this isn't all the code... just a snippet on where my main issue is
if(isset($_POST['add_tickets'])){
$ticket = $_POST['one'];
$ticket = $_POST['two'];
$ticket = $_POST['three'];
$ticket = $_POST['four'];
}
$ticket_owners[] = "$ticket";
print_r($ticket_owners);
I'm trying to input which ticket they bought and their username into an array which then i'll run rand(array) to select a winner and return the answer.
Hmm, did I explain this okay? probably not... I wish I knew a little bit more about PHP... sigh
Can anyone shed some light on this... is this the wrong direction to take? Can it be done better with different methods?
Your code should have been
$ticket = $_POST['ticket']; // this will contain "one", "two", "three", or "four"
remove
if(isset($_POST['add_tickets'])){
}
and remove
$ticket_owners[] = "$ticket";
Now as to storing the username in a list that you will later use to select a random winner from... You will need something of a database or cache. As your array for example will cease to exist once the page is rendered and served to the user.
Since your inputs look like this <input type="radio" name="ticket" value="x">, you need to check $_POST['ticket'] and it will have on of the following values: none (variable won't exist) / one / two / three / four.
Where are you saving who bought what ticket? Where are you storing/receiving data, if you want help with that, please post code and elaborate in what you want to achieve and how you already tried
Related
Overview of what my question is:
I have an array that is populated via XML inputs, and from this I am the using it to populate a web form with form controls. From here I want to be able to select the exact form that is clicked, but to do that I need to give the controls some form of unique identifier, which is an issue...
As the site is of a betting nature and I am currently working with horse racing, each horse is given a unique identifier by default, I have tried to add this identifier to the forms.
e.g:
<?php
//Values from feed examples: 123, 234, 345
$valuesFromFeed = array(123, 234, 345); //These are not in my code, they are values from the XML feed
while ($uniqueIdentifier = $valueFromFeed) {
<form name="horse_<?php echo $uniqueIdentifier; ?>_frm" action="#">
<input type="hidden" name="horse_<?php echo $uniqueIdentifier; ?>" />
<input type="button" value="Place bet" />
</form>
}
?>
But then the problem comes when I try to reference this name of "horse_123", I need to know exactly what the value of that name is, which is impossible as there are millions of horses, tracks and races.
Example of trying to get post:
<?php
if (isset($_POST['horse_' . $uniqueIdetifier])) {
echo "You got the right thing here.";
} else {
echo "Still no joy.";
}
?>
The issue with the code above, is that once the $uniqueIdentifier has been used in the while above, it is removed and is no longer usable in this scope.
So to conclude, my point and question:
How do I get the correct name from the form in a submit for the specific horse that I wish to reference and get information on?
How do I use this information as I need to?
Better Description:
I have been given an XML feed and site as part of a handover, this feed contains many hundreds of races and horses.
When this information is loaded into the page, it is also stored in a database on the server, as well as sending it through some different loops (which are messy, but someone else's code I'm trying to clean up!) which split it down and then make up a dynamic menu containing all the races, horses, odds and information. (All information on a single horse within a race is kept in one form)
Next to the information stated in the prior paragraph, is 2 buttons, one that allows the user to take odds and another that allows users to take starting price.
On either of these button clicks, I need the information attached to said horse, and then populate a betting slip. In the form (mentioned above) the name is "horse_<?php echo $uniqueIdentifier; ?>_frm".
The problem that occurs to me is, yes data is stored on the server when it is loaded, that I cannot seem to get the right form via the unique identifier that is put into the form name
Edits
Added form surrounding my input as this is there, I just missed it in original question
Added the button that transmits data to where I need it
Added a better description of my problem
You can use multiple forms, one for each horse. Each form has a different action, where the URL includes the id of the horse. For example:
<form action="/horses/my_unique_horse_name">
...
</form>
<form action="/horses/another_horse_name">
...
</form>
Or you could have multiple forms all with the same action, with a hidden field for the name of the horse:
<form action="/horses/">
<input type="hidden" value="my_unique_horse_name">
</form>
<form action="/horses/">
<input type="hidden" value="another_horse_name">
</form>
Alternatively, you could have a button for each horse:
<form method="/horses/">
<button type="submit" value="my_unique_horse_name">My Horse</button>
<button type="submit" value="another_horse_name">Another Horse</button>
</form>
Beyond that, I don't entirely understand the problem. What kind of data are you submitting and retrieving?
Having looked at various similar questions, both on SO and elsewhere, I have a horrible feeling what I want to do is impossible, but here goes.
I have a page that is a table of text input rows. The user enters information on each row, and submits the data to a separate file, which creates a PDF.
The problem is that I need the user to be able to add rows to the table at will, since the amount of data can vary.
[Before you go there, I need to point out that I cannot use Javascript for any of this - I know it is easy to do in JS but the page needs to be accessible.]
Here is a very simplified version I just cobbled together to (hopefully) illustrate the point:
<?php
if (filter_has_var(INPUT_POST, 'add_rows')) {
$howmanyrows = filter_input(INPUT_POST, 'howmanyrows', FILTER_SANITIZE_NUMBER_INT);
//get all the data from table and put it in an array,
//then add 5 (or however many) new rows to said array.
}
else if (filter_has_var(INPUT_POST, 'send_data')) {
//get table data, add to session and redirect to other page with a header()
}
?>
<html>
<form action="" method="POST">
<table>
<?php //table rows added using an array of data
foreach ($data as $d): ?>
<tr><td><input type="text" value="<?php echo $d; ?>"></td></tr>
<?php endforeach; ?>
</table>
<input type="text" name="howmanyrows" value="5">
<input type="submit" name="add_rows">
<input type="submit" name="send_data">
</form>
...
</html>
As you can see, at the moment I have a clunky setup where there is just one form that encompasses the entire page, and submits the page to itself. Depending on the button that was clicked, a new row is added or the data is submitted to the PDF-creation page.
This is not ideal, for so many reasons. What I really want to be able to do is have two separate forms, or nested forms. But the former won't allow the input values to be submitted to both, and the latter is apparently bad form (no pun intended) and doesn't work.
Is it at all possible to make this do what I want it to do? Any suggestions for a different way to go about it?
I think you have the best non-javascript solution - certainly hte way I'd run with it.
One thing to make it easier is that you can use multiple inputs with the same name:
<input name="tablerow[]" type="text" value="A" />
<input name="tablerow[]" type="text" value="B" />
<input name="tablerow[]" type="text" value="C" />
And these come through the $_POST['tablerow'] as an array. The length of the array is the number of fields. Then add additional fields to that.
For accessibility, you should add a link at the top that allows the user to hop directly to the first "new" field - otherwise they need to tab through the entire form to get to the new field. (See my comment above about if JS is really unavoidable as you and they can avoid this scenario!)
I have a small problem with my PHP Code and as always, any help is hugely appreciated.
The code was originally designed by another person and I seem to have come across a problem that I can't fix.
The structure of the page is as follows:
A while loop to output the data, each of course, has a unique id.
A checkbox that must be ticked before pressing the 'update' button
(several update buttons present pending on how many rows are
returned.
This is what i'm confused on, he has designed it to they must tick the 'checkbox' before pressing update, otherwise, the script doesn't know which 'id' to update. Why is it like this?!
<?php
if($_POST['accept']){
if(!$_POST['check']){
echo "<div class='error_input'>Error! please tick box to confirm </div>";
}else{
$form_id=$_POST['fid'];
$customer=$_POST['customer'];
mysql_query("UPDATE job SET customer='$customer'WHERE f_id=$form_id ");
echo "<div class='form_ok'>Job has been updated.</div>";
}
?>
If I just comment out the check box, and the user clicks the 'accept' button, it doesn't work, so clearly the 'checkbox' is pointing to the unique ID of the row, but I can't see it?
<input type="checkbox" name="check" value="1" required/>
<input type="submit" name="accept" value="Accept Job">
My issue is, I want to be able to remove this annoying checkbox, and once the user has pressed 'accept' add the unique ID into a session, which I know can be done by:
$_SESSION['user_id'] = $user_id;
As they then get redirected to a pop-up box to which I need this unique ID to pull further data from the database.
I've had a go at implemented this:
<input type="submit" name="accept" value="<?php echo"$user_id"; ?>" class="sbutton">
which works in a nutshell, how ever, it's not user friendly and I can't access the user_id, when I use the $_POST feature, it saves the 'name' field.
I know this is long winded, I hope i've given you enough information, many thanks in advance.
It seems like there is another hidden field in there with the job ID, and each row has it's own <form> tags - so if you'll remove the check for the check field than you're fine.
Like that:
<?php
if($_POST['accept'])
{
$form_id=$_POST['fid'];
$customer=$_POST['customer'];
mysql_query("UPDATE job SET customer='".$customer."' WHERE f_id=".$form_id);
echo "<div class='form_ok'>Job has been updated.</div>";
}
?>
By the way - it's best that you'll check and secure the values from the $_POST with check for numbers and securing against SQL Injection with mysql_real_escape_string function
What I have so far is a paginated page, showing all users in a database system. Each page shows 30 users and has a checkbox next to each user, what I need is a way for users to select and deselect these users and for these selections to propagate through, so if the user goes back to page 1 from page 2, all users from page 1 will still be checked.
I also need a way to record this information, so that once the user has looked at all the pages and clicks a submit form all checked users information can be processed. I am thinking of using javascript to record the information and php sessions to store it, but with the way I am trying now, when a user clicks a checkbox, it is not ticked.
Does anyone have a better way of doing this/see how I can fix this problem?
Thanks.
<script type="text/javascript">
function log_export($str) {
document.check.data.value = $str;
document.check.submit();
}
</script>
<?php
if(isset($_POST['data'])) {
echo $_POST['data'];
}
?>
<form name="check" method = "post" action = "">
<input type="hidden" name="data">
<input type="checkbox" name="A" onclick="log_export('1')" />
<input type="checkbox" name="B" onclick="log_export('2')" />
<input type="checkbox" name="C" onclick="log_export('3')" />
</form>
Few ways you could do this, but I'd avoid using javascript to do it. You could use an array in your $_SESSION to keep the list across pages.
<form name="check" method = "post" action = "">
<input type="checkbox" name="person[A]" />
</form>
(note: The form elements are named person[A], person[B]...etc, so they can be accessed as an array in php and make your life easier.)
Then in the php you can store this in the session...
$_SESSION['saved_list'] = $_REQUEST['person'];
This way the session variable saved_list will contain the array person with all the checked boxes in it. You'll need to be careful not to overwrite the array each time however, so adding...
$_REQUEST['person'] = array_merge($_SESSION['saved_list'], $_REQUEST['person']);
...before this should keep them (if I'm remembering my merge functions correctly).
Alternatively, you could just use html to save the checkboxes already ticked. When page 2 receives the results from page 1, it could print them out as hidden elements at the end of the page 2 form. This way they can exist across pages, however this could become a bit unwieldy with 30 names a page.
I'd suggest storing it in a php session array, this shouldnt really involve using Javascript, it just over-complicates matters.
Why you don't change your form method to GET and make the pagination link so it contains every parameters passed to the form and the page number. I think it make everything more simple to handle that case with parameters passed on the URL against posted one.
you can create those links like this:
for ($i =0; $i < $max_page; $i++){
echo "{$_SERVER['REQUEST_URI']}?$_SERVER['QUERY_STRING']&p={$i}";
and you just have to change your backend to use $_GET instead of $_POST.
I'm looking for any direction on a really quick and dirty webpage. I'm going to have two static items, say person A and person B. I would like to click a (+) or (-) button next to each of them which then increments or decrements an integer that's displayed relative to each person.
Anyone having a quick tut or anything would be useful.
Aside from this, how hard would it be to keep a viewable log of each time the value was altered either incremented or decremented, would it be easy to add in date/time to that?
Edit
Alright, concerning mysql. I have a db already setup from a previous wordpress installation. I'm going to create a new tables named 'points', should this have 2 fields? One for a person A and one for a person B?
Since you want it to remember the value between sessions (ie- if I incremented the counter, left the website, and came back, I expect it to still be incremented) you need to store the value server-side. Databases are the best recommendation for this.
If you're planning to use PHP (which I assume from the tags), then MySQL is one of the easiest databases to implement. If you already have a MySQL database set up at your host, then this will be easy. If not, how to set up a MySQL database will be another question you need to ask.
Since you want quick and dirty the best method would be a form. Either POST or GET (preferably GET if you want people to send a "vote up this image" link, preferably POST if you don't want such links to be possible). This is easy, but it also requires reloading the page which is why modern voting systems use AJAX calls (javascript).
Your HTML form would look something like this:
<!-- Person A goes here -->
This person has a score of <!-- We'll do this soon -->.
<form method="get" <!-- or post --> action="vote.php">
<input type="submit" name="submit_button" value="Vote Up!" />
<input type="submit" name="submit_button" value="Vote Down =(" />
<input type="hidden" name="person" value="A" />
</form>
<!-- Similar for person B -->
Note that <!-- --> is the syntax for an HTML comment (these will be removed in the final website)
In vote.php you would need to first see if the form was submitted, then see WHICH submit button was pressed (vote up or down), then see which person it applies to. Then we do our database entry.
<?php
if(isset($_GET['submit_button'])){
// They submit the form
$add = ($_GET['submit_button'] == 'Vote Up!') ? 1 : -1;
$person = $_GET['person'];
$link = mysql_connect('localhost', 'user', 'password');
mysql_select_db('database', $link);
mysql_query("UPDATE table SET value=value+$add WHERE person=$person");
} else {
die("You didn't submit the form =(");
}
?>
Mind you this is a REALLY dirty method (there is no parsing of the query and no checks made. This is very susceptible to an SQL injection. Do NOT use this in a database with important information. In fact- probably don't use this at all without a few changes =) )
Now then, this basically takes the table table, finds the entry where person equals whatever person was selected (chosen by which form was used to submit), then adds either +1 or -1 to value. You can change any of these variable names in your own table. The next step: reading the value to display on the previous page. Remember that before I just had the comment <!-- we'll do this soon -->. We'll get to that now.
In the beginning of your first page you want to read the database. This means your first page must also be PHP.
<?php
$link = mysql_connect('localhost', 'user', 'password');
mysql_select_db('database', $link);
$result = mysql_query("SELECT value FROM table WHERE person=A");
...
Now you have a MySQL resource, but you need the value out of it.
...
$row = mysql_fetch_row($result);
...
And now we display it with the information.
<!-- Person A goes here -->
This person has a score of <?php echo $row[0]; ?>.
<form method="get" <!-- or post --> action="vote.php">
<input type="submit" name="submit_button" value="Vote Up!" />
<input type="submit" name="submit_button" value="Vote Down =(" />
<input type="hidden" name="person" value="A" />
</form>
Then you repeat for person B. This is really the dirtiest method since it involves one call to the database per person. Ideally you'd grab all values you want in a single call and then iterate over the returned resource and determine who was who. Or, if you really wanted to be fancy, you could already know who was who by using SORT ASC =)
Like I said, though, this is the quickest, easiest, and dirtiest method to do what you want using PHP and MySQL.
Anyway I'd go for the database storing of person data and increment by id .
This is the flow for it :
Create mysql or mysqli database "person", create table "rates" id - autoincrement
rate will be integer.
Create php file with database connection and the functions related to it.
you can use same file to create increment function, when row is the result from the integer relative to this entry :
$rate = $row['rate'];
function incvar(){
global $rate;
if(isset($rate) || $rate>0){
return $rate++;
}
}
function decvar(){
global $rate;
if(isset($rate) || $rate>0){
return $rate--;
}
}
Now create query updating existing fields with results from those functions.
Ideally is to create ajax request onclick to this file to increase and decrease the integer. For fast execution use jquery.