I've this simple form, when the price is set to 120 $:
<input type="checkbox" name="addon[book]" value="120" /> book
<input type="checkbox" name="addon[plane]" value="420" /> Plane
Could I send two values (USD & €) with thr form?
EDIT:
I added name="addon[book]" because I'll display the name too
EDIT 2:
PHP:
foreach($addon as $name => $value) {
echo 'your addons: '.$name;
}
$total = array_sum(array_map("intval", $_POST["addon"]));
echo 'the total '.$total.' $';
<input type="hidden" name="addon[book_USD]" value="250" />
<input type="checkbox" name="addon[book_EUR]" value="120" /> book
However NEVER trust the input from the form. Check the price in the backend code or users can change the price!
EDIT
What about json encoding?
<input type="checkbox" name="addon[book]" value="{"USD":250,"EUR":120}" /> book
EDIT2
To explode the values you'll have to use json_decode()
EDIT3
As others (and myself) already stated what you are trying to do (at least from the looks of it) is that you use the price from the input field as the price the user is going to pay.
That is not the best thing you can do, cause users can easily change the price of the input field.
I don't know your code but somehting like the following would be much better:
<input type="checkbox" name="addon[book]" value="book1">
And in your PHP code:
$prices = array('book1'=>array('USD'=>250, 'EUR'=>120),
'book2'=>array('USD'=>120, 'EUR'=>60),
);
Related
i have a form in html that when the certain fields are clicked i want it to add up the values in the php part, so i thought that if i put the php part in the value area of the html then it would add it up, but it adds them all up but not the specific ones when clicked, Please help:
<p>
<input type="checkbox" name="one" value= <?php $number = 2.39; ?>
<label for="one">Four 100-watt light bulbs for $2.39</label>
<p>
$total = $number + $numberone + $numbertwo + $numberthree;
echo "Total cost is " .$total;
echo $card;
?>
</form>
First, you need to echo out the number value in your form, not just assign the variable, nothing will be rendered there. Also, I find that if you're adding numbers for totals, it's easier to name them in a fashion that you can pull the values back out in an array
name="one"
would become
name="price[]"
or something of the like.
<p>
<input type="checkbox" name="price[]" value= <?php echo('2.39'); ?>
<label for="one">Four 100-watt light bulbs for $2.39</label>
</p>
Then on the server side, just sum the totals
$total = 0;
foreach($_POST['price'] AS $value){
$total += $value;
}
You'll want to do some input sanitization, but this example should get you going.
This example will only work on the server-side after a form submission, if you want to add them up in realtime on the page, you'd have to use ajax to add the values up.
Given this code:
<input type="checkbox" id="Coke" name="Price" value="70" />
<input type="checkbox" id="Fanta" name="Price" value="70" />
<input type="checkbox" id="Sprite" name="Price" value="70" />
I would like to know how, if my user selects Fanta checkbox, I want my php variable $type="Fanta" but I need form checkbox VALUES to stay NUMERIC for total price calculation.
It's not clear what exactly you're asking, but I believe you basically want 2 fields, one that defines the price and one that defines the selected type.
In that case, your best bet would be to store the prices server-side (That way people can't modify them too, which is good!). If you do this, your checkboxes will look like this:
<input type="checkbox" id="Coke" name="type[]" value="Coke" />
<input type="checkbox" id="Fanta" name="type[]" value="Fanta" />
<input type="checkbox" id="Sprite" name="type[]" value="Sprite" />
Your backend code would look like this:
$prices = array(
'Coke' => 70,
'Fanta' => 70,
'Sprite' => 70
);
$types = $_POST['type'];
$total = 0;
foreach($types as $key => $type) {
if (!isset($prices[$type]))
continue;
$total += $prices[$type];
}
// Use $total as your total price for whatever calculation
echo $total;
As per your comment, if you still want these prices client side for calculations, you can use json_encode to output it into a script tag and use the prices directly. It's basically going to turn the server-side prices array into a client-side array of prices.
<script type="text/javascript">
var prices = <?= json_encode($prices) ?>;
// Now you can use prices['Coke'] etc, based off the value of the selected checkbox.
</script>
I would like to know how, if my user selects Fanta checkbox,
Then name you field fanta:
<input type="checkbox" id="Fanta" name="fanta" value="70" />
Once you have done that you can get the values using either the $_POST or the $_GET superglobal (depending on your form method):
if (isset($_POST['fanta'])) {
echo $_POST['fanta'];
}
However you should never ever ever rely on the prices coming from the clientside!
but I need form checkbox VALUES to stay NUMERIC for total price calculation.
That is not going to happen because in HTTP values are being send as strings. Luckily PHP does automatic type juggling for you so you will still be able to do calculations with the string values.
http://codepad.viper-7.com/GOhHdz
In some situations you want to make it a integer value explicitly. In that case you can use type casting:
var_dump((int) '18');
http://codepad.viper-7.com/kJlGoS
When you post a form, anyway you will get 70 as value.
echo $_POST['Price'];
gives 70
<input type="checkbox" value="Coke" name="Price" rel=70 />
<input type="checkbox" value="Fanta" name="Price" rel="70" />
<input type="checkbox" value="Sprite" name="Price" rel="70" />
use javascript to get rel attribute value for selected checkbox for total price
I'm doing this one using PHP.
I'm doing some basic quiz application and it has a backend. On my backend, I am setting up a quiz for students to answer. One of my interface is like this.
If the user checked the box, it means 1950 is the answer. How would I process that one in my database to determine that 1950 has been the answer of the question.
My Database is like this.
tbl_choices
Id,Choice,isAnswer
so ideally, it would be stored like this.
tbl_choices
ID CHOICE isAnswer
001 1900 0
002 1800 0
003 1950 1
004 1850 0
My question here is how would I code it in a sense when a user will check the checkbox and the textinput right beside it will have a value of isAnswer as 1.
Just an additional info: When a user will click that + button it will add a new textinput and if user will click - button it will delete a textinput, but I got that all covered.
The choices are dynamic, it will changed, that above that I've shown you is just an example.
P.S: Sorry for the title, I don't know what's the title of this kind of question :-)
Your help would be greatly appreciated and rewarded!
you can try html like this :
<input type="checkbox" value="1900" name="answer1[]">
<input type="text" value="1900" name="answer2[]" />
<input type="checkbox" value="1800" name="answer1[]">
<input type="text" value="1800" name="answer2[]" />
<input type="checkbox" value="1950" name="answer1[]">
<input type="text" value="1950" name="answer2[]" />
<input type="checkbox" value="1850" name="answer1[]">
<input type="text" value="1850" name="answer2[]" />
and then use php code:
foreach($_POST['answer2'] as $v){
if(in_array($v, $_POST['answer1'])) {
$s = 1;
}else
$s = 0;
$sql = "INSERT INTO table VALUES(null, $v, $s)";
}
also on click plus update values of both check box and text field
in general you can use checkboxes as an array when submiting information, just name the checkboxes as an array like
<input type="checkbox" value="1900" name="answer1[]">
<input type="checkbox" value="1800" name="answer1[]">
<input type="checkbox" value="1950" name="answer1[]">
<input type="checkbox" value="1850" name="answer1[]">
then on the server side you handle $_POST["answer1"] as an array and cycle through the possible answers, something like this
if (is_array($_POST["answer1"]))
{
foreach($_POST["answer1"] as $answer)
{
// insert into database here
}
}
important: this will only show what a user actualy selected, if an option is not clicked then it will not be part of the array
I think it would make sense to have more than one table, one for the questions with their options and then one for the answers with the fields id, choice_id. Otherwise it is going to make generating the questions a lot more difficult especially when a number of students answer the same question?
One more thing, you could add up in the answers of your question, add row and delete row based on + and - button.
The code for that:
<script type="text/javascript">
$(document).ready(function() {
$("#plus").click(function() {
$('#mytable2 tbody>tr:last').clone(true).
insertAfter('#mytable2 tbody>tr:last');
$('#mytable2 tbody>tr:last #st').val('');
$('#mytable2 tbody>tr:last #newst').val('');
$('#mytable2 tbody>tr:last #plus').val('+');
return false;
});
});
for more detail, you may refer following link:
Add Row on Button click
I am using position absolute's validation engine for my form. I would like to check whether at least one checkbox from group is selected. In examples it is done by setting the same name attribute for group of checkboxes.
I cannot name checkboxes with the same name, because I am saving their state in database with following code:
$values = array(
'checkbox1' => null,
'checkbox2' => null
);
foreach (array_intersect_key($_POST, $values) as $key => $value) {
$values[$key] = mysql_real_escape_string($value);
}
$query_add_candidate=sprintf("INSERT INTO dbase (checkbox1, checkbox2) VALUES ('$values[checkbox1]', '$dates[checkbox2]')"
Now checkbox1 and checkbox2 are validated individually, beacuse they have different names. How can I check if selected is at least one of them?
Here is my HTML code:
<input class="validate[minCheckbox[1]] checkbox" type="checkbox" name="checkbox1" id="maxcheck1" value="1"/> Text1
<input class="validate[minCheckbox[1]] checkbox" type="checkbox" name="checkbox2" id="maxcheck2" value="2"/> Text2
on php ,
if(!$_POST['checkbox1'] && !$_POST['checkbox2']){
echo 'Error check at least one';
}
but what you really want is an array,
HTML,
<input type="checkbox" value="ch1" name="check[]" />
<input type="checkbox" value="ch2" name="check[]" />
php
<?php
if(empty($_POST['check'])){
echo 'Error: hey, check at least one will you!?';
}
?>
so this way you don't have to check all of them one by one, especially if you have loads of them on the same page.
NOTICE: You should also know, if checkbox is not ticked it will also not be set on the php $_POST superglobal, otherwise if it is ticked, it will show whatever the value="..." holds,
if its posted then its checked,
so if you have it in $_POST["checkbox_name"] then its checked, otherwise it wont be posted.
You can either add loads of code to reimplement control arrays in a poor way, or you can alter the code that builds your query so it can accept control arrays.
I would prefer the latter.
i have a kohana application, and i have a form with several checkboxes, and the user is supposed to check his preferences there in the form. so i have a relation 1:n between the user table and the preferences table. my problem is that i want to save those preferences, selected in the form, and i don;t know how.
i have the form:
<form id="address" method="POST" action="<?= Route::url('Save user preferences' , array('user_id' => $user));?>">
<? foreach ($prefered_products as $pp): ?>
<input type="checkbox" name="user_preferences_preference[]" value="<?= $pp ?>" /><?= $pp->product; ?><br />
<? endforeach; ?>
<button type="submit">Salveaza preferintele tale</button>
</form>
and i save the data:
foreach ($_POST['user_preferences_preference'] as $up) {
$user_preferences->prefered = $up;
$user_preferences->user = $this->user;
$user_preferences->save();
}
$this->view->message = __('Thank you for your feedback!');
but seems like the way i parse the preferences is not correct, i am getting: ErrorException [ Warning ]: Invalid argument supplied for foreach()
any idea about how am i supposed to get the multiple $_post preferences?
thank you!
I have a slightly different way of doing this.
When I create a checkbox I also create an identical hidden field set to zero
<input type="hidden" name="my_check" value="0" />
<input type="checkbox" name="my_check" value="$value" />
The checkbox, if ticked, will override the hidden value. This way when you send the form you end up with $_POST['checkbox]=1 or 0, but it always exists in the $_POST.
The nice thing about this method is you can extend the Form::checkbox helper so that it's always present and you don't have to worry about it for every form / controller.
p.s. in you above example you would probably want to do it like this:
<input type="hidden" name="user_preferences_preference[$pp->id]" value="0" />
<input type="checkbox" name="user_preferences_preference[$pp->id]" value="<?= $pp ?>" />
<?= $pp->product; ?><br />
Or use a $key value instead of $pp->id.
The problem is that a checkbox will only post data when set. You should reverse check the values. Ie;
Fetch all preference (id's) from the database
Check if a value is found in the $_POST var
If not, update to false (or 0 or whatever) in db, if set, read out the value.