I want to get the value of a checkbox once it checked.
From my code
$vat_checkbox = $this->input->post('vat_checkbox');
print_r($vat_checkbox);
die();
it display "on". I will use it for validation. What would be the proper way without using javascript?
When checkbox is checked you will get value as on else you will not get that tag also. so You can do something like this.
$post['vat_checkbox'] = $this->input->post('vat_checkbox');
if(isset($post['vat_checkbox']) && $post['vat_checkbox'] == 'on') {
$post['vat_checkbox'] = 1;
} else {
$post['vat_checkbox'] = 0;
}
Here $post['vat_checkbox'] you can use for operation
Just add value attribute in input tag if you dont want to do with jquery
<form action="test.php" method="POST">
<input type="checkbox" name="vat_checkbox_1" value="1" checked>
<input type="checkbox" name="vat_checkbox_2" checked>
<input type="submit" name="submit" value="SUBMIT">
</form>
If you added value then it will give you value from value attribute else "on"
Output:
Array
(
[vat_checkbox_1] => 1
[vat_checkbox_2] => on
[submit] => SUBMIT
)
Here, In Controller you can directly use your checkbox data without any manipulation.
How to read if a checkbox is checked in PHP?
If your HTML page looks like this:
<input type="checkbox" name="test" value="value1">
After submitting the form you can check it with:
isset($_POST['test'])
or
if ($_POST['test'] == 'value1') ...
Zend Framework use a nice hack on checkboxes, which you can also do yourself:
Every checkbox generated is associated with a hidden field of the same name, placed just before the checkbox, and with a value of "0". Then if your checkbox as the value "1", you'll always get the '0' or '1' value in the resulting GET or POST
<input type="hidden" name="foo" value="0" />
<input type="checkbox" name="foo" value="1">
When using checkboxes as an array:
<input type="checkbox" name="food[]" value="Orange">
<input type="checkbox" name="food[]" value="Apple">
You should use in_array():
if(in_array('Orange', $_POST['food'])){
echo 'Orange was checked!';
}
Remember to check the array is set first, such as:
if(isset($_POST['food']) && in_array(...
Let your html for your checkbox will be like
<input type="checkbox" name="check1">
Then after submitting your form you need to check like
if (isset($_POST['check1'])) {
// Checkbox is selected
} else {
// Alternate code
}
Assuming that check1 should be your checkbox name.And if your form submitting method is GET then you need to check with $_GET variables like
if (isset($_GET['check1'])) {
// Checkbox is selected
}
$check_value = isset($_POST['my_checkbox_name']) ? 1 : 0;
I've been using this trick for several years and it works perfectly without any problem for checked/unchecked checkbox status while using with PHP and Database.
HTML Code: (for Add Page)
<input name="status" type="checkbox" value="1" checked>
Hint: remove checked if you want to show it as unchecked by default
HTML Code: (for Edit Page)
<input name="status" type="checkbox" value="1"
<?php if ($row['status'] == 1) { echo "checked='checked'"; } ?>>
PHP Code: (use for Add/Edit pages)
$status = $_POST['status'];
if ($status == 1) {
$status = 1;
} else {
$status = 0;
}
Hint: There will always be empty value unless user checked it. So, we already have PHP code to catch it else keep the value to 0. Then, simply use the $status variable for database.
To check if a checkbox is checked use empty()
When the form is submitted, the checkbox will ALWAYS be set, because ALL POST variables will be sent with the form.
Check if checkbox is checked with empty as followed:
//Check if checkbox is checked
if(!empty($_POST['checkbox'])){
#Checkbox selected code
} else {
#Checkbox not selected code
}
You can check the corresponding value as being set and non-empty in either the $_POST or $_GET array depending on your form's action.
i.e.: With a POST form using a name of "test" (i.e.: <input type="checkbox" name="test"> , you'd use:
if(isset($_POST['test']) {
// The checkbox was enabled...
}
You can do it with the short if:
$check_value = isset($_POST['my_checkbox_name']) ? 1 : 0;
or with the new PHP7 Null coalescing operator
$check_value = $_POST['my_checkbox_name'] ?? 0;
Learn about isset which is a built in "function" that can be used in if statements to tell if a variable has been used or set
Example:
if(isset($_POST["testvariabel"]))
{
echo "testvariabel has been set!";
}
Well, the above examples work only when you want to INSERT a value, not useful for UPDATE different values to different columns, so here is my little trick to update:
//EMPTY ALL VALUES TO 0
$queryMU ='UPDATE '.$db->dbprefix().'settings SET menu_news = 0, menu_gallery = 0, menu_events = 0, menu_contact = 0';
$stmtMU = $db->prepare($queryMU);
$stmtMU->execute();
if(!empty($_POST['check_menus'])) {
foreach($_POST['check_menus'] as $checkU) {
try {
//UPDATE only the values checked
$queryMU ='UPDATE '.$db->dbprefix().'settings SET '.$checkU.'= 1';
$stmtMU = $db->prepare($queryMU);
$stmtMU->execute();
} catch(PDOException $e) {
$msg = 'Error: ' . $e->getMessage();}
}
}
<input type="checkbox" value="menu_news" name="check_menus[]" />
<input type="checkbox" value="menu_gallery" name="check_menus[]" />
....
The secret is just update all VALUES first (in this case to 0), and since the will only send the checked values, that means everything you get should be set to 1, so everything you get set it to 1.
Example is PHP but applies for everything.
Have fun :)
$is_checked = isset($_POST['your_checkbox_name']) &&
$_POST['your_checkbox_name'] == 'on';
Short circuit evaluation will take care so that you don't access your_checkbox_name when it was not submitted.
A minimalistic boolean check with switch position retaining
<?php
$checked = ($_POST['foo'] == ' checked');
?>
<input type="checkbox" name="foo" value=" checked"<?=$_POST['foo']?>>
<?php
if (isset($_POST['add'])) {
$nama = $_POST['name'];
$subscribe = isset($_POST['subscribe']) ? $_POST['subscribe'] : "Not Checked";
echo "Name: {$nama} <br />";
echo "Subscribe: {$subscribe}";
echo "<hr />";
}
?>
<form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>" method="POST" >
<input type="text" name="name" /> <br />
<input type="checkbox" name="subscribe" value="news" /> News <br />
<input type="submit" name="add" value="Save" />
</form>
<form>
<input type="check" id=chk1 value="1">
<input type="check" id=chk2 value="1">
<input type="check" id=chk3 value="1">
</form>
when you check on chk2 you can see values as:
<?php
foreach($_POST as $key=>$value)
{
if(isset($key))
$$key=strip_tags($value);
}
insert into table (chk1,chk2,chk3) values ('','1','');
?>
in BS3 you can put
<?php
$checked="hola";
$exenta = $datosOrdenCompra[0]['exenta'];
var_dump($datosOrdenCompra[0]['exenta']);
if(isset($datosOrdenCompra[0]['exenta']) and $datosOrdenCompra[0]['exenta'] == 1){
$checked="on";
}else{
$checked="off";
}
?>
<input type="checkbox" id="exenta" name="exenta" <?php echo $checked;?> > <span class="label-text"> Exenta</span>
Please Note the usage of isset($datosOrdenCompra[0]['exenta'])
Wordpress have the checked() function.
Reference: https://developer.wordpress.org/reference/functions/checked/
checked( mixed $checked, mixed $current = true, bool $echo = true )
Description
Compares the first two arguments and if identical marks as checked
Parameters
$checked
(mixed) (Required) One of the values to compare
$current
(mixed) (Optional) (true) The other value to compare if not just true
Default value: true
$echo
(bool) (Optional) Whether to echo or just return the string
Default value: true
Return #Return
(string) html attribute or empty string
i have fixed it into a PHP form with a checkbox
$categories = get_terms( ['taxonomy' => 'product_cat', 'hide_empty' => false] );
foreach ($categories as $categorie) {
echo "<input type="checkbox" value="$categorie->term_taxonomy_id" name="catselected[]"> $categorie->slug";
}
This way i add it to the Woocommerce tabel.
wp_set_post_terms( $product_id, $_POST['catselected'], 'product_cat' );
filter_input(INPUT_POST, 'checkbox_name', FILTER_DEFAULT, FILTER_FORCE_ARRAY)
<?php
if(isset($_POST['nameCheckbox'])){
$_SESSION['fr_nameCheckbox'] = true;
}
?>
<input type="checkbox" name="nameCheckbox"
<?php
if(isset($_SESSION['fr_nameCheckbox'])){
echo 'checked';
unset($_SESSION['fr_nameCheckbox']);
}
?>
you should give name to your input .
then which box is clicked you will receive 'on' in your choose method
Array
(
[shch] => on
[foch] => on
[ins_id] => #
[ins_start] => شروع گفتگو
[ins_time] => ما معمولاً در چند دقیقه پاسخ میدهیم
[ins_sound] => https://.../media/sounds/ding-sound-effect_2.mp3
[ins_message] => سلام % به کمک نیاز دارید؟
[clickgen] =>
)
i have two checked box in my form name with 'shch' and 'foch'
This is my form and categories comes from the database with while loop.
I want to insert the checked inputs only in to database.
How can i detect which checkbox is selected ?
<form action="account.php" method="POST">
<ul class="account-info">
<li>Category1 : <input type="checkbox" value="val1" name="cat1"></li>
<li>Category2 : <input type="checkbox" value="val2" name="cat1"></li>
<li>Category3 : <input type="checkbox" value="val3" name="cat1"></li>
<!-- while continues -->
<li>Category100 : <input type="checkbox" value="val100" name="cat1"></li>
</ul>
<input type="submit" value="submit" />
</form>
In account.php only the check boxes will be posted. As you've named them all the same though, only 1 will be posted, the last checkbox. If you want them to have the same name and come through as an array you need to add [] after the name, like this:
<input type="checkbox" value="val100" name="cat1[]">
Then in your account.php where they are submitted you can do this:
foreach($_POST['cat1'] as $val)
{
echo "$val<br>";
}
That will echo out the values of all the checked boxes.
First off, you have your options set up as if they were radio buttons all having the same name turning into 1 value out of the 3 possible. If you want them to be conventional checkboxes you have to give them separate names.
in your PHP you would check if the array_key_exists for the checkbox name in question, this is how I usually translate the checkbox fields in a form to be easier to use:
<?php
$checked = array(
'cat1' => array_key_exists('cat1', $_POST),
'cat2' => array_key_exists('cat2', $_POST),
'cat3' => array_key_exists('cat3', $_POST)
);
print_r($checked);
exit;
?>
change the name="cat1" to name="cat[1][]"
in your account.php page
foreach($_POST['cat'] as $category){
foreach($category as $value){
echo $value;
}
}
You can check it like that:
This code will check which categories are activated
assuming that your database returns categories from 0 to x
$i = 0;
while(true){
if ($_POST["cat".$i."]) {
//category activated
}
else {
//no category found -> loop ends
break;
}
$i++;
}
I am using the code below in my php file to get the values from a multiple checkbox.
if(!empty($_POST['check_list'])) {
foreach($_POST['check_list'] as $check) {
update_comment_meta($check, 'consider', 1);
}
}
The problem is that this code is apparently putting in the array $_POST['check_list'] only the checked values.
My need is to perfom the function update_comment_meta also on uncheked values, by putting '0' as the third parameter instead of '1'.
For more details, I give the code generating the HTML form:
<form action="" id="primaryPostForm" method="POST">
<?php
$defaults = array(
'post_id' => $current_post);
$com= get_comments( $defaults );
foreach ($com as $co) {
if(get_comment_meta($co->comment_ID, 'consider', true)==1) {
?><input type="checkbox" name="check_list[]" value="<?php echo $co->comment_ID; ?>" checked="checked">
<?php }
else {
?><input type="checkbox" name="check_list[]" value="<?php echo $co->comment_ID; ?>" >
<?php
}}
</form>
Your usual help is always appreciated.
sending unchecked value to post is somewhat not that easy.Better solution is that you name checkbox in a way using which you can easily iterate over them in post page.
Use hidden input along with checkbox.Checkbox prioritize over hidden input.
<form>
<input type='hidden' value='0' name='check_box_con'>
<input type='checkbox' value='1' name='check_box_con'>
</form>
Now after submit, as both have same name , check_box_con will show hidden field value if unchecked , else will override and show original.
For more see
Post the checkboxes that are unchecked
Here is the solution I used ( based on PeeHaa comment):
if(!empty($_POST['check_list'])) {
foreach ($com as $co) {
if (in_array($co->comment_ID,$_POST['check_list']))
update_comment_meta($co->comment_ID, 'consider', 1);
else
update_comment_meta($co->comment_ID, 'consider', 0);
}
}
In fact POST variable works like this with checkboxes, so the simple way is to use server side language to know what are values not sent via POST.
Thank you for your time.
hello i have the following problem:
i would like to create a filter for a search engine. i have some inputfields for specific search terms and beside a respective checkbox. so that looks like:
inputfield a: [_____] filter for a: on/off: [ ]
inputfield b: [_____] filter for b: on/off: [ ]
inputfield c: [_____] filter for c: on/off: [ ]
the code structure of that is:
first of all check if the inputfield is empty and the checkbox is set checked. in case of checked it will be unchecked after submit. the other way around, if just the inputfield is filled and the checkbox unchecked, it also will error out, that there is a mistake and the filter can't work. so i'm using for each filter an own error array like (the name and value of the first checkbox is name="filter_a" value="1") :
...
$checkbox_filter_a = $db->real_escape_string(htmlentities(trim($_POST['filter_a'])));
...
$filter_a = (!empty($checkbox_filter_a)) ? 1 : 0;
...
$errors_a = array();
if ($filter_a == 1){
if (empty($input_a)){
$errors_a[] = 'the filter needs some input';
}
}
if (!empty($input_a)){
if ($filter_a == 0){
$errors_a[] = 'filter is not activated';
}
}
if there is no error and both criteria are fulfilled the filter either is on or not.
so the logical behind that is, when loading the page the checkbox have to be unchecked. after regarding the criteria to filter it is on.
to display the status checked or unchecked under the conditions below it should be checked after submit or either not. therefor i have this code for each filter (respective checkbox_filter_b, ...) the part of the checkbox after the inputfield:
<?php
if (checkbox_filter_a == 0 ) {
echo '<input type="checkbox" name="checkbox_filter_a" value="1" checked/>';
}else {
echo '<input type="checkbox" name="checkbox_filter_a" value="1"/>';
}
?>
what does not satisfy at all. this is because of the following problem:
when loading the page it will show all checkboxes are unchecked. if i try to cause an error because of no filled input or just checked checkbox for one of these filters, after submit all other checkboxes are automatically checked.
so if there is someone who could help me out i really would appreciate. thanks a lot.
Perhaps you could do it this way, by defining default values for your check boxes and values at the start of your script. Then change them with the values of the POSTed if there set or not.
<?php
//Setup Variable Defaults, if POST dont change them then there no complicated ifelse's
$filter_a=null;
$checkbox_filter_a='<input type="checkbox" name="checkbox_filter_a" value="1"/>';
$filter_b=null;
$checkbox_filter_b='<input type="checkbox" name="checkbox_filter_b" value="1"/>';
$filter_c=null;
$checkbox_filter_c='<input type="checkbox" name="checkbox_filter_c" value="1"/>';
//Check for post
if($_SERVER['REQUEST_METHOD'] == 'POST'){
//If the check box is not checked checkbox_filter_a will fail this part
// so $filter_a will still be null
if(isset($_POST['filter_a']) && isset($_POST['checkbox_filter_a'])){
$filter_a = trim($_POST['filter_a']);
$checkbox_filter_a ='<input type="checkbox" name="checkbox_filter_a" value="1" checked/>';
}
if(isset($_POST['filter_b']) && isset($_POST['checkbox_filter_b'])){
$filter_b = trim($_POST['filter_b']);
$checkbox_filter_b = '<input type="checkbox" name="checkbox_filter_b" value="1" checked/>';
}
if(isset($_POST['filter_c']) && isset($_POST['checkbox_filter_c'])){
$filter_c = trim($_POST['filter_c']);
$checkbox_filter_c = '<input type="checkbox" name="checkbox_filter_c" value="1" checked/>';
}
}
echo <<<FORM
<form method="POST" action="">
<p>Inputfield a: <input type="text" name="filter_a" value="$filter_a" size="20"> filter for a: on/off:$checkbox_filter_a</p>
<p>Inputfield b: <input type="text" name="filter_b" value="$filter_b" size="20"> filter for b: on/off:$checkbox_filter_b</p>
<p>Inputfield c: <input type="text" name="filter_c" value="$filter_c" size="20"> filter for c: on/off:$checkbox_filter_c</p>
<p><input type="submit" value="Submit"></p>
</form>
FORM;
//now here all you have to do is see if these values are not null and build your query
echo $filter_a.'<br />';
echo $filter_b.'<br />';
echo $filter_c.'<br />';
?>