Hi I have a form like that
<form method=post action="control.php">
<input name="cat[]" type="checkbox" value="blabla" checked>blabla
<input name="cat[]" type="checkbox" value="bleble" checked>bleble
.
.
.
<input name="send" type="submit" id="send" value="send">
</form>
in control.php, I want to get unchecked box when I use $_POST[cat]. How can I do that? thanks for help...
Checkbox groups (cat[]) can easily be generated from an array, using a foreach.
$cat=array(
'blabla' => 'blabla',
'bleble' => 'bleble',
...
);
<? foreach ($cat as $k=>$v) : ?>
<input name="cat[]" type="checkbox" value="<?=$k?>" checked /><?=$v?>
<? endforeach; ?>
If you have an array with all the possible checkboxes, it is very easy to compare it with the POSTed array of selected checkboxes, and find out which ones are missing.
You can use array_diff for that:
$unchecked=array_diff(array_keys($cat), $_POST['cat']);
You can't get the unchecked box, you can only get the checked ones.
If you need the unchecked boxes, you'll have to look at the checked boxes and figure out which ones were not checked.
Related
I am using array of checkboxes in my draggable UI, so that we can change the row order by drag and drop. When I drag the bottom entries to top I am not getting all the checked checkboxes on POST.
You can try this by moving row in inspect element.
<form type="post" name="chekfrm" action="index.php">
<table>
<tr><td><input type="checkbox" name="dconf_check[]" value="18" checked="checked" id="dconf_18" title="name"></td></tr>
<tr><td><input type="checkbox" name="dconf_check[]" value="13" checked="checked" id="dconf_13" title="name"></td></tr>
<tr><td><input type="checkbox" name="dconf_check[]" value="19" checked="checked" id="dconf_19" title="name"></td></tr>
</table>
<input type="submit" name="submit" value="submit">
print_r($this->input->post("dconf_check"));
The issue was because of not closing the form in CodeIgniter (echo form_close();).
It was getting all checked checkboxes on POST, when it is not dragged it's place.
When I drag 4th one on the top then it will post only the checkboxes greater than or equal to 4, means we will not get the first three.
I have html checkbox like this:
<form action="" method="post">
<input type="checkbox" name="language[]" value="php" />PHP<br />
<input type="checkbox" name="language[]" value="html" />HTML<br />
<input type="checkbox" name="language[]" value="java" />Java<br />
<input type="checkbox" name="language[]" value="c++" />C++<br />
<input type="submit" value="send" />
</form>
Now I want to detect the checkbox is not checked using this PHP
if($_POST)
{
if(empty($_POST['language']))
{
echo "bla";
}
else
{
foreach($_POST['language'] as $value)
{
echo 'Checked: '.$value.'
';
}
}
}
The output is always show the checbox checked.
My question is, how can I detect the checkbox is not checked?
Example I do not check PHP and Java.
You don't need to validate checkbox by checkbox in order to determine if they are checked or not, you won't get the unchecked checkboxes values at the time you send the form, so, sending the form like this:
<form action="" method="post">
<input type="checkbox" name="language[]" value="php" />PHP<br /> <!-- checked -->
<input type="checkbox" name="language[]" value="html" />HTML<br /><!-- checked -->
<input type="checkbox" name="language[]" value="java" />Java<br /><!-- unchecked -->
<input type="checkbox" name="language[]" value="c++" />C++<br /><!-- unchecked -->
<input type="submit" value="send" />
</form>
In your PHP, you will get an array as follows:
$_POST['languages'] = array("php", "html");
Now, lets say you have an array of all the values in order to check which ones you need to delete, and which ones you need to add, a rough code example would be as follows:
$allValues = array('php', 'html', 'java', 'c++');
$valuesForAdd = $_POST['language'];
$valuesForDeletion = array_diff($allValues, $valuesForAdd);
First you need the selectable items array in the backend:
$items = array('php','html','java','c++');
You have the posted (selected) languages array here:
$_POST['language']
Not selected languages array:
$not_selected_languages = array_diff($items,$_POST['language']);
I hope it helps.
Only 'checked' checkboxes get sent as parameters in a POST request.
If you want to know which aren't checked, you could have the value list stored on PHP side; then once you receive POST data - compare the array on PHP side with POST array.
$all_vals = array('php', 'c++', 'html', 'java');
$post_vals = $_POST['languages'];
foreach ($post_vals as $post_val)
if in_array($post_val, $all_vals)
$checkbox checked
else
$checkbox not checked
I assume this gives you enough liberty to do what you need.
This question will show what a newbie I am. The situation is this. It's a photo contest.
People upload a photo and to the right on the same line is a checkbox.
Voters check the box if they like the photo. They can select up to, say, 5 photos.
Keeping it simple, my problem isn't with MySQL, but with the form. Each row has a checkbox, which is a form. The SUBMIT button is the problem. The only way I can figure out to have submit work is by putting a submit button with each checkbox. Of course, that's ridiculous. What I want is to read all the checked boxes and have ONE submit button when the voter is finished. Spent hours on this and can't see how to have the SUBMIT by itself that the voter can click and have all the checked values inserted into the database a one time.
Any notions? I know this sound very primitive, but just getting into this.
Thanks ahead of time for any help
You can enclose all the checkboxes in a single html form tag and have the submit button inside it. It'll automatically submit data in all checkboxes
Or
You can use javascript/jQuery to run through all the checkboxes. And submit the form.
Well, there are all sorts of javascript ways to go out and grab the data you want and submit it, but let's keep it simple.
[voteform.html]
<form action="process_script.php">
<img src="image1"><input type="checkbox" name="vote_for_image[]" value="1">
<img src="image2"><input type="checkbox" name="vote_for_image[]" value="2">
<input type="submit">
</form>
... then ... (please note the [RETURN ERROR...] and [DATABASE...] blocks are just place holders for you to fill in code)
[process_script.php]
<?
if (count($_GET['vote_for_image'] > 5) {
[RETURN ERROR 'Please select no more than 5 images to vote for']
}
else {
foreach ($_GET['vote_for_image'] as $index => $image_id) {
[DATABASE INSERT OR UPDATE FOR $image_id]
}
}
?>
Set the checkbox[] as name attribute for each checkbox and on submission you can address the valiues as arrays
<body>
<form action="checkbox.php" method="post">
<input type="checkbox" name="checkbox[]" value="a">
<input type="checkbox" name="checkbox[]" value="b">
<input type="checkbox" name="checkbox[]" value="c">
<input type="checkbox" name="checkbox[]" value="d">
<input type="submit" name="Submit" value="Submit">
</form>
<?php
if(isset($_POST['Submit']))
{
echo $_POST['checkbox'];
}
?>
</body>
the above will give you
Array (
[0] => a
[1]=>b
[2] => c
[3]=>d
)
Try this code
//HTML
<form method='post'>
<input type='checkbox' name='photo[]' value='1' />
<img src='test1.jpg' />
<input type='checkbox' name='photo[]' value='2'/>
<img src='test2.jpg' />
<input type='submit' value="Submit" name="submit" />
</form>
//PHP
if(isset($_POST['submit']))
{
if(isset($_POST['photo']))
{
if(count($_POST['photo']) > 5)
{
// Display error msg
}
else
{
// Contains all ids voted on
$img_ids=explode(',',$_POST['photo']);
// insert or update DB for the image ids
}
}
}
I have an array of checkboxes name="box[]". Through PHP I make sure that they're checked after they're submitted by echoing "checked='checked'" if they were checked at submit event.
Now, if I check the third box, the value jumps down to the first checkbox after submit, since the array was empty up until the third checkbox. Same, if I check the 2nd and 3rd checkbox, they jump down to 1st and 2nd after submit. This is the code I'm using:
<form method="post">
<input type="checkbox" name="box[]" value="true" <?php if ($box[0] == true) echo "checked='checked'"; ?>><br>
<input type="checkbox" name="box[]" value="true" <?php if ($box[1] == true) echo "checked='checked'"; ?>><br>
<input type="checkbox" name="box[]" value="true" <?php if ($box[2] == true) echo "checked='checked'"; ?>><br>
<p>
<input type="submit" value="Submit">
</form>
Try it at:
http://experiencerapanui.com/selecttest.php
Can I make the checkboxes fill up the array with a value "false" or whatever, if the box is unchecked? Which way should I go?
****** EDIT ******
Thanks to phant0m, I managed to come up with a solution:
<form method="post">
<input type="checkbox" name="box[]" value="1" <?php if (in_array("1", $box)) echo "checked='checked'"; ?>><br>
<input type="checkbox" name="box[]" value="2" <?php if (in_array("2", $box)) echo "checked='checked'"; ?>><br>
<input type="checkbox" name="box[]" value="3" <?php if (in_array("3", $box)) echo "checked='checked'"; ?>><br>
<p>
<input type="submit" value="Submit">
</form>
Putting unique values for the checkboxes, then if I find the value in the array $box[], the box is marked as checked.
This does not work, because only those checkboxes, that are checked, are being put into the $box array.
Either use different names, or different values to distinguish between them.
Consider this: You check the second and the third checkbox. In PHP, you will receive:
$_POST['box'] = array(0 => "true", 1 => "true");
You cannot know, which checkboxes have been checked, unless all of them are.
The POST value should start with isset, then !empty($array) determines if the POST value is an array and prevents a null array error when no options are selected.
&& is_array($_POST['box']) could be used in addition to !empty($_POST['box']) as well to check the validity of the array.
A variable is used in the following examples for the value field, as it makes it easier to define and populate inputs when using a foreach loop and may be sanitized if needed as a preventive measure.
It would probably be a good idea to sanitize the $_POST array also, and enclosing it in a function with the validation would allow it all to be called from the checkbox input and keep the input area tidy.
<input type="checkbox" name="box[]" value="<?php echo $unique_id; ?>" <?php if(isset($_POST['box']) && !empty($_POST['box']) && in_array($unique_id, $_POST['box'])) echo "checked='checked'"; ?>>
OR
<input type="checkbox" name="box[]" value="<?php echo $unique_id; ?>" <?php my_function(); ?>>
Excellent question and solutions! There seem to be relatively few examples that use an array method to preserve Post selections, and the one provided here is relevant and very helpful even years later.
I'm getting database from database and each row has a id and im showing it like this in html
<td><input type="checkbox" value"1">test1</td></tr>
<td><input type="checkbox" value"2">test2</td></tr>
and so on...
now lets say that user checked ten check boxes out of 15 and then clicked submit .
how to get values of those boxes in php???
Your checkboxes need to have a name & a value attribute:
<input type='checkbox' name='test1' value='1'> Test1
<input type='checkbox' name='test2' value='1'> Test2
then when that is posted you can access the values in PHP via $_POST:
$test1 = $_POST['test1']
$test2 = $_POST['test2']
Keep in mind that the values will only be returned if the box is checked, so most likely instead of the above PHP, you're more than likely just going to want to check if the value exists.
give the checkboxes names:
<td><input type="checkbox" value"2" name='test'>test2</td></tr>
Than in php just read the request
$test = $_REQUEST['test']
if the OP doesn't have these checkboxes inside of a , any amount of PHP code will make absolutely no difference (FROM Blender)
they will be in either the $_GET or the $_POST array
Try this way..
<form action="#" method="post">
<input type="checkbox" name="check_list[]" value="1"><label>Test 1</label><br/>
<input type="checkbox" name="check_list[]" value="2"><label>Test 1</label><br/>
<input type="checkbox" name="check_list[]" value="3"><label>Test 3</label><br/>
<input type="submit" name="submit" value="Submit"/>
</form>
<?php
if(isset($_POST['submit'])){//to run PHP script on submit
if(!empty($_POST['check_list'])){
// Loop to store and display values of individual checked checkbox.
foreach($_POST['check_list'] as $selected){
echo $selected."</br>";
}
}
}
?>