PHP get checkbox value in checked/unchecked [duplicate] - php

Question

This question already has answers here:
Get checked and unchecked checkboxes value
(3 answers)
Closed 8 years ago.
<?php
// $groups is fetch_array from mysql
foreach($groups as $group) {
if ($group['delete_user'] === 'Y') {
$checked = "checked=\"checked\";
}
else {
$checked = '';
}
?>
<input type = "checkbox" name="delete_user[<?php echo $group['id']; ?>]" <?php echo $checked; ?>>
<?php
}
?>
Will output:
<form action="test.php" method="post">
<input type="checkbox" name="delete_user[1]">
<input type="checkbox" name="delete_user[2]">
<input type="checkbox" name="delete_user[3]">
<input type="checkbox" name="delete_user[4]" checked="checked">
<input type="submit" name="save_action" value="Save">
</form>
And when I check inputs as wanted, then this will process input.
<?php
if(isset($_POST['save_action']) {
if (empty($_POST['delete_user'])) {
$_POST['delete_user'] = array();
}
foreach($_POST['delete_user'] as $del) {
is_checked($del); //#todo
}
}
?>
I am looking for way to check if check-box is checked and return proper value ( Y or N ). In this point I declared is_checked() function for this purpose.

Answer 1

I would do it like this:
<form action="test.php" method="post">
<input type="checkbox" name="delete_user[]" value="1">
<input type="checkbox" name="delete_user[]" value="2">
<input type="checkbox" name="delete_user[]" value="3">
<input type="checkbox" name="delete_user[]" value="4" checked="checked">
<input type="submit" name="save_action" value="Save">
</form>
Now in PHP you can loop over the $_POST['delete_user'] and it will contain the values of the selected items.
foreach($_POST['delete_user'] as $item)
{
// code to delete $item
}

Answer 2

As the comments already mentioned, only the checked checkboxes will be set
So you either have to take the index as ID or add a val to each input element.
The latter would probably be cleaner (in my opinion)
<?php
// $groups is fetch_array from mysql
foreach($groups as $group) {
if ($group['delete_user'] === 'Y') {
$checked = "checked=\"checked\";
}
else {
$checked = '';
}
?>
<input type = "checkbox" name="delete_user[]" <?php echo $checked; ?> value="<?php echo $group['id'];?>">
<?php
}
?>
And the code which does something with the inputs:
<?php
if(isset($_POST['save_action']) {
if (empty($_POST['delete_user'])) {
$_POST['delete_user'] = array();
}
foreach($_POST['delete_user'] as $del) {
// do something with $del - the id
}
}
?>

Answer 3

Use the checkbox name just as an array and then give the id as value. See the below code.
<?php
// $groups is fetch_array from mysql
foreach($groups as $group) {
if ($group['delete_user'] === 'Y') {
$checked = "checked=\"checked\";
}
else {
$checked = '';
}
?>
<input type = "checkbox" name="delete_user[]" value="<?php echo $group['id']; ?>" <?php echo $checked; ?>>
<?php
}
?>
Then on the action page place this code
<?php
foreach($_POST['delete_user'] as $del) {
is_checked($del); //#todo
}
}
?>
This will work fine.