I've run into an issue I find very confusing. I have a form with one checkbox. I need the form to apply a value of 1 or 0 if the checkbox is checked or not.
<input type="checkbox" name="admin">
Then the PHP, something like this:
$update_data['admin'] = isset($_POST['admin']) ? '1' : '0';
It works if it's checked. I'm not sure how to go about getting the "off" state.
PHP Code need to be changed
$update_data['admin'] = empty($_POST['admin']) ? '0' : '1';
isset() will only check whether the value is set i.e. Null or Not. In ur case it set to ZERO
empty on the other hand check for both value is set to null and value is Zero if either of them true then return true .
and in HTML
<input type='checkbox' value ='1' name='admim'>
When checkbox is submitted with no value, its value is 'on' if retrieved from $_POST['admin']. I guess you can also do
$update_data['admin'] = ($_POST['admin'] === 'on') ? '1' : '0';
update_data['admin'] becomes '0'. Isn't that what you want to achieve?isset($_POST['admin']) before checking if it has value 'on'. Otherwise, it will throw a notice: undefined index, when it's not set. I prefer working with no notice at all.Checking if something is defined with isset is different from getting its value. Try this:
<input type="checkbox" name="admin" value="checked_or_whatever_value_you_like">
if(isset($_POST['admin'])){
$update_data['admin'] = $_POST['admin'] == 'checked_or_whatever_value_you_like' ? '1' : '0';
}
Everything should work as intended :)
Just to make sure that for was submitted:
admin
If checkbox is unchecked, the value (and it's key) wont be passed to query string.
So, check
If (isset($_POST['submit'])){
$update_data['admin'] = isset($_POST['admin']) ;
//actions if form has been submitted.
}
It seems to work with me, here is my sample code :
<form action="" method="POST">
<input type="checkbox" name="admin">
<input type="submit">
</form>
<?php
$check = isset($_POST['admin']) ? '1' : '0';
echo $check;
var_dump($check);
?>
it will produce 1 string(1) "1" when you check the checkbox and 0 string(1) "0" if it's unchecked.
I found the answer in another post. With:
$update_data['admin'] = ($_POST['admin'] == 1) ? '1' : '0';
