I'm generating a form with php/mysql. I'm using checkbox that looks like that:
<input type="checkbox" id="my2_3" name="my2_3" />
<input type="checkbox" id="my2_4" name="my2_4" />
<input type="checkbox" id="my2_5" name="my2_5" />
My issue is to retrieve those data (whether the checkbox is checked or not and the id).
How can I retrieve that with php without knowing in advance what will be the $_POST[""] to request?
<input type="checkbox" id="my2_3" name="my[]" value="my2_3" />
<input type="checkbox" id="my2_4" name="my[]" value="my2_4" />
<input type="checkbox" id="my2_5" name="my[]" value="my2_5" />
I changed the name attribute to an array,
foreach($_POST['check'] as $value) {
$check_msg .= "Checked: $value\n";
}
You can use foreach($_POST as $key => $value) { ... } to iterate over all POST vars.
It'd be easier for you if you changed the name attribute to create a php array. Check the documentation on creating arrays in HTML form.
Checkboxes are only posted when they are ticked. So you need to inspect $_POST and use isset() to determine whether or not the key you are looking for (the name attribute of a checkbox) is present. If it is, the checkbox was ticked. If not, the checkbox was unticked.
Related
I've got a problem.
I don't know how to put the value of my checkbox in my MySQL database with PHP.
So :
<input type="checkbox" name="checkiard" value="IARD">
How to put the value "IARD" in my database ONLY if the checkbox is check ?
Thank you guys.
You can access the value of checkbox as any other input types. Its simply
if(isset($_POST['checkiard'])) {
$optionArray = implode(",", $_POST["checkiard"]);
}
Try this.
If you have more than one checkbox then you markup should be something like this
<input type="checkbox" name="checkiard[]" value="IARD-1">
<input type="checkbox" name="checkiard[]" value="IARD-2">
<input type="checkbox" name="checkiard[]" value="IARD-3">
you must keep the name same for all the checkbox.
How can I use the conditional OR in a form with isset?
I have this but it does not work.
FORM HTML:
...
<input type="checkbox" name="carga1">
<input type="checkbox" name="carga2">
...
and the PHP
$cargas=array($_POST['carga1'],$_POST['carga2'],$_POST['carga3'],
$_POST['carga4'],$_POST['carga5'],$_POST['carga6'],
$_POST['carga7'],$_POST['carga8'],$_POST['carga9'],
$_POST['carga10'],$_POST['carga11'],$_POST['carga12'],
$_POST['carga13'],$_POST['carga14'],$_POST['carga15'],
$_POST['carga16'],$_POST['carga17'],$_POST['carga18']);
if(isset($cargas[0]) ││ isset ($cargas[1])){
$cargas[0]=5.62;
$cargas[1]=4.5;
echo "$cargas[0]<br>";
echo "$cargas[1]<br>";
}
i expect that this works but is not.
Only checked checkbox is posted to the server.You have to change your condition using pregmatch and work accordingly.
$postData = $_POST;
foreach ($postData as $key => $value) {
$match = preg_match('|cargas(\d+)|', $key, $matches);
if ($match) {
$index = $matches[1];
if($index == 0 || $index == 1){
// do your stuff which you would have done in case of $cargas[0] ,$cargas[1]
}
}
}
I think array is not Suitable way to do this try following
try this
<input type="checkbox" name="carga1">
<input type="checkbox" name="carga2">
.....................................
<input type="submit" name="submit">
<?php
if(isset($_POST['submit'])){
//
$category1=$_POST['carga1'];
$category2=$_POST['carga2'];
$category3=$_POST['carga3'];
if(isset($category1) ││ isset ($category2)){
$category1=5.62;
$category2=4.5;
echo "$category1<br>";
echo "$category2<br>";
}
}
?>
only the checked checkboxes get posted. so it needs slightly different appraoch.
You can acheive it like this-
put a hidden input with the same name as the checkbox that might not be checked. I think it works so that if the checkbox isn't checked, the hidden input is still successful and sent to the server but if the checkbox is checked it will override the hidden input before it. This way you don't have to keep track of which values in the posted data were expected to come from checkboxes.
<form>
<input type='hidden' id='testName' value='0' name='carga1'>
<input type='checkbox' id='testNameHidden' value='1' name='carga1'>
</form>
Before submitting the form , disabled the hidden field based on the checked condition.
<script>
if(document.getElementById("testName").checked){
document.getElementById('testNameHidden').disabled = true;
}
</script>
I personally think its the easiest approach for this.
ok, check boxes in html works as follows,
<input type="checkbox" name="carga1" value="1">
<input type="checkbox" name="carga2" value="123">
in php,
if the check box is in checked state during the submission, you will get
isset($_POST['carga1']) as true, else the form element would not be available in post data, hence false.
and in cheked state you will get value for
$_POST['carga1'] as 1 and
$_POST['carga2'] as 123
and if you want to group the check boxes in form you can use a single name for multiple check boxes and different values,
<input type="checkbox" name="carga[]" value="1">
<input type="checkbox" name="carga[]" value="2">
<input type="checkbox" name="carga[]" value="3">
<input type="checkbox" name="carga[]" value="4">
and in php you will get an array of selected values of the check boxes
$arr=$_POST['carga'];
and you can use foreach to iterate through the values,,,
I am simply trying to pass my checkbox values through a session variable for use if the user goes back at some point. After going to my first page and POSTING, I want these selections stored in a SESSION variable. I've had no luck so far in figuring this one out. My code is below.
Here is my html of my checkboxes. I have about 15 checkboxes with the same name as below. I take all those checkboxes and break them down in another script for insertion into a database.
<input type='checkbox' name='list[]' id='product' value='Product'></input>
Here I am setting my variable with the POST of the checkboxes.
$checkboxes = $_POST['list'];
$_SESSION['list'] = $checkboxes;
How can I pass these checkbox selections into and out of a session variable for selecting elements on a previous page?
Change:
<input type='checkbox' name='list[]' id='product' value='Product'></input>
To
<input type='checkbox' name='list[0]' id='product' value='Product'></input>
<input type='checkbox' name='list[1]' id='product' value='Product'></input>
etc.
And use foreach:
Okay so. We know that in $_SESSION['list'] we have only checked ones!
foreach ($_SESSION['list'] as $key => $value)
{
echo '<input type="checkbox" name="list['$key']" value="'.$value.'" checked="checked >';
}
Just thought I share my code / solution for storing the html form checkbox value in a session. My search did not get me to cover all scenarios that I needed.
My scenario includes that I pass a default state for checked or not checked.
HTML Form Code:
<input type="hidden" name="product[]" value = 0>
<input name="product[]" type="checkbox" value = 1 <?php echo (($productvalue == 1) ? 'checked' : '')?>>
PHP Form processing code:
$productvalue = ((isset($_POST['product'])) ? array_sum((array)$_POST['product']) : ((isset($_SESSION['productsession'])) ? $_SESSION['productsession'] : 0));
$_SESSION['productsession'] = $productvalue;
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.